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Transforming nanoscale VO_(2)(B) into a scalable sodium-ion electrode

Nano research 2024年第10期17卷 8809-8818页

作者： Yunkai Luo Swetha Chandrasekaran Bintao Hu randy Chen marcus Worsley Bruce dunn department of Materials Science and Engineering University of CaliforniaLos AngelesCA 90095USA Lawrence Livermore National Laboratory CA 94550USA

The intermittent nature of renewable energies requires highly reliable grid-level energy storage approaches.A critical consid.r.tion in developing this technology is the areal capacity which determines battery performance and influences the cost of battery *** related importance is finding new ways of developing scalable *** recent years,threedimensional(3d)printing of conductive scaffolds has emerged as an alternative to overcome the scalability limitations of commercial tape cast *** research carried out in the current study demonstrates a successful scalability pathway for nanoscale VO_(2)(B),a desirable cathode for sodium-ion batteries which has a nano-flower morphology with a crystallite sizerodepositing VO_(2)(B)onto a graphene aerogel scaffold,we were able to achieve mass loading of over 100 mg·cm^(-2) and still possess an areal capacity of 10 mAh·cm^(-2) at a current density of 5 mA·cm^(-2).Moreover,after 1000 cycles,these electrodes retained 75% to 80% of their initial *** at high loading levels,the electrodeposited VO_(2)(B)exhibits pseudocapacitive material signatures such as a box-like voltammetry response,linear galvanostatic response,and no phase change upon *** scalability of the VO_(2)(B)electrode is demonstrated in a series of experiments which show the areal capacity to scale upon increase in both mass loading and electrode thickness,with only small changes in specific *** study establishes that nanoscale materials can be scaled up to achieve thick electrodes without compromising their electrochemical properties.

关键词： nano VO_(2)(B) sodium-ion battery scalable electrodes three-dimensional(3d)printed scaffold additive manufacturing

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Electrochemical realization of 3d Interconnected MoS_(3)/PPy Nanowire Frameworks as Sulfur-Equivalent Cathode Materials for Li-S Batteries

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Energy & Environmental Materials 2024年第2期7卷 9-17页

作者： Hongtao Yu Andreas Siebert Shilin Mei raul Garcia-diez roberto Félix Ting Quan Yaolin Xu Johannes Frisch regan G.Wilks marcus Bär Chun Pei Yan Lu department for Electrochemical Energy Storage Helmholtz-Zentrum Berlin für Materialien und Energie GmbH(HZB)Hahn-Meitner Platz 114109 BerlinGermany Guangdong Province Key Laboratory of d.r.bility for Marine Civil Engineering School of Civil EngineeringShenzhen UniversityShenzhenGuangdong 518060China department of Interface design HZBAlbert-Einstein-Str.1512489 BerlinGermany Energy Materials In-Situ Laboratory Berlin(EMIL) Albert-Einstein-Str.1512489 BerlinGermany Helmholtz-Institute Erlangen-Nürnberg for renewable Energy(HI ErN) Albert-Einstein-Str.1512489 BerlinGermany department of Chemistry and Pharmacy Friedrich-Alexander-Universität Erlangen-NürnbergEgerlandstr.391058Erlangen Germany Institute of Chemistry University of Potsdam14467Potsdam Germany

The development of freestanding and bind.r.free electrode is an effective approach to perform the inherent capacity of active materials and promote the mechanism study by minimizing the interference from ***,we construct a freestanding cathode composed of MoS_(3)/PPy nanowires(NWs)deposited on porous nickel foam(NF)(MoS_(3)/PPy/NF)through electrochemical methods,which can work efficiently as sulfur-equivalent cathode material for Li-S *** structural stability of the MoS_(3)/PPy/NF cathode is greatly enhanced due to its significant tolerance to the volume expansion of MoS_(3)d.r.ng the lithiation process,which we ascribe to the flexible 3d framework of PPy NWs,leading to superior cycling performance compared to the bulk-MoS_(3)/NF *** the interference of bind.r.and carbon additives,the evolution of the chemical and electronic structure of Mo and S species d.r.ng the discharge/charge was studied by X-ray absorption near-edge spectroscopy(XANES).The formation of lithium polysulfides was excluded as the driving cathode reaction mechanism,suggesting the great potential of MoS_(3)as a promising sulfur-equivalent cathode material to evade the shuttle effect for Li-S *** present study successfully demonstrates the importance of structural design of freestanding electrode enhancing the cycling performances and.r.vealing the corresponding mechanisms.

关键词： 3d-Network electrochemical lithium-sulfur battery MoS_(3) PPy

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Insights into the hydrogen evolution reaction in vanadium redox flow batteries:A synchrotron radiation based X-ray imaging study

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Journal of Energy Chemistry 2024年第4期91卷 132-144页

作者： Kerstin Köble Alexey Ershov Kangjun duan Monja Schilling Alexand.r.rampf Angelica Cecilia TomášFaragó marcus Zuber Tilo Baumbach roswitha Zeis Helmholtz Institute Ulm Karlsruhe Institute of Technology89081 UlmGermany Laboratory for Applications of Synchrotron radiation Karlsruhe Institute of Technology76131 KarlsruheGermany Institute for Photon Science and Synchrotron radiation Karlsruhe Institute of Technology76344 Eggenstein-LeopoldshafenGermany department of Electrical Electronicsand Communication EngineeringFaculty of EngineeringFriedrich-Alexander-Universität Erlangen-Nürnberg(FAU)91058 ErlangenGermany department of Mechanical and Industrial Engineering University of TorontoToronto M5S 3G8OntarioCanada

The parasitic hydrogen evolution reaction(HEr)in the negative half-cell of vanadium redox flow batteries(VrFBs)causes severe efficiency ***,a deeper und.r.tanding of this process and the accompanying bubble formation is *** benchmarking study locally analyzes the bubble distribution in thick,porous electrodes for the first time using deep learning-based image segmentation of synchrotron X-ray *** large three-dimensional data set was processed precisely in less than one minute while minimizing human errors and pointing out areas of increased HEr activity in *** study systematically varies the electrode potential and material,concluding that more negative electrode potentials of-200 m V *** hydrogen electrode(rHE)and lower cause more substantial bubble formation,resulting in bubble fractions of around 15%–20%in carbon felt ***,the bubble fractions stay only around 2%in an electrode combining carbon felt and carbon *** detected areas with high HEr activity,such as the bord.r.subregion with more than 30%bubble fraction in carbon felt electrodes,the cutting edges,and preferential spots in the electrode bulk,are potential-independent and suggest that larger electrodes with a higher bulk-to-bord.r.ratio might reduce HEr-related performance *** described combination of electrochemical measurements,local X-ray microtomography,AI-based segmentation,and 3d morphometric analysis is a powerful and novel approach for local bubble analysis in three-dimensional porous electrodes,providing an essential toolkit for a broad community working on bubble-generating electrochemical systems.

关键词： Vanadium redox flow battery Synchrotron X-ray imaging Tomography Hydrogen evolution reaction Gas bubbles deep learning

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1例家族性腺瘤性息肉病家族史阴性的年轻女孩患有肠系膜纤维瘤

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世界核心医学期刊文摘（儿科学分册） 2005年第11期1卷 61-61页

作者： Huerta S. Heubner d.r. marcus d.r. 王经纬 department of Surgery University of California Irvine Orange CA 92868United States

Mesenteric fibromatosis (MF) is a rare, benign tumor commonly associated with Gardner’s syndrome. The signs and symptoms in patients with MF are insidious. Patients may present with abdominal pain or discomfort when the tumors reach large sizes, which is typical at the time of diagnosis. differentiating MF from other neoplasms such as gastrointestinal stromal tumorsmay present a diagnostic dilemma, especially in patients without any history of familial adenomatous polyposis. In the present report, we discuss a young girl who presented with MF. A pertinent review of the literature is also presented. This case is peculiar in that MF presented at a young age in a patient without history of familial adenomatous polyposis and occurred in the omentum with local invasion to the stomach.

关键词：肠系膜纤维瘤腺瘤性息肉胃肠肿瘤发病年龄文献资料

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Computed tomography-based.r.diomics diagnostic approach for differential diagnosis between early-and late-stage pancreatic ductal adenocarcinoma

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World Journal of Gastrointestinal Oncology 2024年第4期16卷 1256-1267页

作者： Shuai ren Li-Chao Qian Ying-Ying Cao marcus J daniels Li-Na Song Ying Tian Zhong-Qiu Wang department of radiology Jiangsu Province Hospital of Chinese MedicineAffiliated Hospital of Nanjing University of Chinese MedicineNanjing 210029Jiangsu ProvinceChina department of Geratology Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese MedicineNanjing 210022Jiangsu ProvinceChina department of radiology NYU Langone HealthNew YorkNY 10016United States

BACKGrOUNd One of the primary reasons for the dismal survival rates in pancreatic ductal adenocarcinoma(PdAC)is that most patients are usually diagnosed at late *** is an urgent unmet clinical need to identify and develop diagnostic methods that could precisely detect PdAC at its earliest *** A total of 71 patients with pathologically proved PdAC based on surgical resection who und.r.ent contrast-enhanced computed tomography(CT)within 30 d prior to surgery were included in the *** staging was performed in accordance with the 8th edition of the American Joint Committee on Cancer staging *** features were extracted from the region of interest(rOI)for each patient using Analysis Kit *** most important and predictive radiomics features were selected using Mann-Whitney U test,univar-iate logistic regression analysis,and minimum redundancy maximum relevance(MrMr)*** forest(rF)method was used to construct the radiomics model,and 10-times leave group out cross-validation(LGOCV)method was used to validate the robustness and.r.producibility of the *** A total of 792 radiomics features(396 from late arterial phase and 396 from portal venous phase)were extracted from the rOI for each patient using Analysis Kit *** most important and predictive features were selected using Mann-Whitney U test,univariate logistic regression analysis,and MrMr *** method was used to construct the radiomics model with the nine most predictive radiomics features,which showed a high discriminative ability with 97.7%accuracy,97.6%sensitivity,97.8%specificity,98.4%positive predictive value,and 96.8%negative predictive *** radiomics model was proved to be robust and.r.producible using 10-times LGOCV method with an average area und.r.the curve of 0.75 by the average performance of the 10 newly built *** The radiomics model based on CT could serve as a promising non-invasive method in differential diag

关键词： Pancreatic ductal adenocarcinoma radiomics Computed tomography American Joint Committee on Cancer staging

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Interpenetrated Structures for Enhancing Ion diffusion Kinetics in Electrochemical Energy Storage devices

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Nano-Micro Letters 2024年第11期16卷 718-728页

作者： Xinzhe Xue Longsheng Feng Qiu ren Cassidy Tran Samuel Eisenberg Anica Pinongcos Logan Valdovinos Cathleen Hsieh Tae Wook Heo marcus A.Worsley Cheng Zhu Yat Li department of Chemistry and Biochemistry University of California1156 High StreetSanta CruzCA 95064USA Lawrence Livermore National Laboratory 7000 East AvenueLivermoreCA 94550USA

The architectural design of electrodes offers new opportunities for next-generation electrochemical energy storage devices(EESds)by increasing surface area,thickness,and active materials mass loading while maintaining good ion diffusion through optimized electrode ***,conventional thick electrodes increase ion diffusion length and cause larger ion concentration gradients,limiting reaction *** demonstrate a strategy for building interpenetrated structures that shortens ion diffusion length and.r.duces ion concentration *** free-standing device structure also avoids short-circuiting without needing a *** feature size and number of interpenetrated units can be adjusted d.r.ng printing to balance surface area and ion *** with a 3d-printed interpenetrated polymer substrate,we metallize it to make it *** substrate has two individually ad.r.ssable electrodes,allowing selective electrodeposition of energy storage *** a Zn//MnO_(2) battery as a model system,the interpenetrated device outperforms conventional separate electrode configurations,improving volumetric energy density by 221%and exhibiting a higher capacity retention rate of 49%compared to 35%at temperatures from 20 to 0℃.Our study introduces a new EESd architecture applicable to Li-ion,Na-ion batteries,supercapacitors,etc.

关键词： Interpenetrated structure 3d printing Electrochemical energy storage Ion diffusion length Inter-electrode distance

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The effect of Laves phases and nano-precipitates on the electrochemical corrosion resistance of Mg-Al-Ca alloys und.r.alkaline conditions

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Journal of Magnesium and Alloys 2024年第6期12卷 2447-2461页

作者： Markus Felten Veronika Chaineux Siyuan Zhang Ali Tehranchi Tilmann Hickel Christina Scheu Joshua Spille Marta Lipińska-Chwałek Joachim Mayer Benjamin Berkels marcus Hans Imke Greving Silja Flenner Sandra Sefa daniela Zander Chair of Corrosion and Corrosion Protection RWTH Aachen UniversityAachen 52072 Germany Max-Planck-Institut für Eisenforschung GmbH Düsseldorf 40237 Germany Central Facility for Electron Microscopy RWTH Aachen UniversityAachen 52074 Germany Ernst ruska-Centre for Microscopy and Spectroscopy with Electrons Forschungszentrum Jülich GmbHJülich 52428Germany Mathematical Image and Signal Processing Aachen Institute for Advanced Study in Computational Engineering ScienceRWTH Aachen UniversityAachen 52062 Germany Materials Chemistry RWTH Aachen UniversityAachen 52074 Germany Institute of Materials Physics Helmholtz-Zentrum HereonGeesthacht 21502 Germany

The electrochemical corrosion mechanisms of Mg alloys were extensively studied in previous investigations of different chemical com-positions,modified surface states and various electrolyte ***,recent research focused on the active state of Mg dissolution,leading to unresolved effects of second.r. phases adjacent to a stableα-solid solution passive *** present study investigates the fundamental electrochemical corrosion mechanisms of three different Laves phases with varying phase morphologies and phase fractions in the passive state of Mg-Al-Ca *** microstructure was characterized by(transmission-)electron microscopy and synchrotron-based transmission X-ray *** electrochemical corrosion resistance was determined with a stand.r. three-electrode setup and advanced in-situ flow cell measurements.A new electrochemical activity sequence(C15>C36>α-Mg>C14)was obtained,as a result of a stable passive layer formation on theα-solid ***,nm-scale Mg-rich precipitates were identified within the Laves phases,which tend to inhibit the corrosion kinetics.

关键词： Laves phase STEM Magnesium Corrosion Passive layer

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Mitigating greenhouse gas emissions from municipal wastewater treatment in China

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Environmental Science and Ecotechnology 2024年第4期20卷 333-340页

作者： Yindong Tong Xiawei Liao Yanying He Xiaomei Cui marcus Wishart Feng Zhao Yulian Liao Yingxin Zhao Xuebin Lv Jiawen Xie Yiwen Liu Guanyi Chen Li'an Hou School of Ecology and Environment Tibet UniversityLhasa850012China School of Environmental Science&Engineering Tianjin UniversityTianjin300072China Bay Area International Business School Beijing Normal UniversityZhuhai519087China The World Bank Washington D.C.20433USA School of Mechanical Engineering Tianjin University of CommerceTianjin300134China

Municipal wastewater treatment plays an indispensable role in enhancing water quality by eliminating *** the process is vital,its environmental footprint,especially in terms of greenhouse gas(GHG)emissions,remains *** we offer a comprehensive assessment of GHG emissions from wastewater treatment plants(WWTPs)across *** analyses reveal an estimated 1.54(0.92-2.65)×10^(4)Gg release of GHGs(CO_(2)-eq)in 2020,with a dominant contribution from N_(2)O emissions and electricity *** can foresee a 60-65%reduction potential in GHG emissions with promising advancements in wastewater treatment,such as cutting-edge biological techniques,intelligent wastewater strategies,and a shift towards renewable energy sources.

关键词： Wastewater treatment Greenhouse gas emission Pollutant removal Advanced technology China

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Evaluation of the antidiabetic activity and toxicological properties of Jaundea pinnata(***.)

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Clinical Traditional Medicine and Pharmacology 2024年第2期5卷 25-31页

作者： Farouk Adedeji Oladoja Emmanuel S.Irokosu Elijah O.Oyinloye Akanji A.Murtala marcus d.Ayoola Fatimah O.Lasisi Oyinkansola T.Ad.r.bigbe department of Pharmacology and Toxicology Faculty of PharmacyOlabisi Onabanjo UniversityAgo-IwoyeOgun-State 121102Nigeria department of Pharmacology and Therapeutics Faculty of Basic Medical ScienceOlabisi Onabanjo UniversityAgo-IwoyeOgun-State 121102Nigeria department of Pharmacognosy Faculty of PharmacyObafemi Awolowo University Ile-IfeOsun-State 220282Nigeria

Background:Jaundea pinnata(JP),is a new plant native to North Africa,East Africa,Southern Nigeria,and *** is traditionally used as an anti-rheumatic,anti-inflammatory,antibacterial and antidiabetic herb,thus making it a potential source for mod.r. antidiabetic ***:This investigation aimed to assess the toxicological profile and the antidiabetic potentials of the methanol extract of the Jaundea pinnata(JP)leaf in mice and ***:Preliminary phytochemical screening of JP leaf was conducted using stand.r. *** plant extract’s acute and sub-chronic toxicity was evaluated using a modified OECd *** normal and streptozotocin-induced diabetic rats,its anti-diabetic action was tested over 28 days at doses of 100 mg/kg,200 mg/kg,and 400 mg/kg,with glibenclamide(10 mg/kg)and distilled water serving as the positive and negative controls,*** organs’histopathological analysis was also ***:According to the preliminary phytochemical analysis of the leaf extract,JP contains flavonoids,saponins,alkaloids,tannins,terpenoids,deoxy-sugars,and *** extract demonstrated an Ld50 of above 2000 mg/kg in *** days 14,21,and 28 in streptozotocin-induced diabetic rats,the extract showed a dosedependent antidiabetic effect;nevertheless,the activity of the extract at 400 mg/kg on day 28 was barely comparable to that of glibenclamide(10 mg/kg).At 250 mg/kg,500 mg/kg,and 1500 mg/kg,respectively,the extract was appreciably non-toxic to the liver and kidney,while inducing a significant change in haematological ***:The study found that JP presented antihyperglycemic properties and was relatively safe at normal dosages(<2000 mg/kg).

关键词： Jaundea pinnata diabetes mellitus Haematological and biochemical parameters

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Ocular image-based deep learning for predicting refractive error:A systematic review

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Advances in Ophthalmology Practice and.r.search 2024年第3期4卷 164-172页

作者： Samantha Min Er Yew Yibing Chen Jocelyn Hui Lin Goh david Ziyou Chen marcus Chun Jin Tan Ching-Yu Cheng Victor Teck Chang Koh Yih Chung Tham department of Ophthalmology Yong Loo Lin School of MedicineNational University of SingaporeSingapore Centre for Innovation and Precision Eye Health Yong Loo Lin School of MedicineNational University of SingaporeSingapore School of Chemistry Chemical Engineeringand BiotechnologyNanyang Technological UniversitySingapore Singapore Eye research Institute Singapore National Eye CentreSingapore department of Ophthalmology National University HospitalSingapore Ophthalmology and Visual Sciences(Eye ACP) Duke-NUS Medical SchoolSingapore

ackground:Uncorrected.r.fractive error is a major cause of vision impairment worldwide and its increasing prevalent necessitates effective screening and management ***,deep learning,a subset of Artificial Intelligence,has significantly advanced ophthalmological diagnostics by automating tasks that required extensive clinical *** recent studies have investigated the use of deep learning models for refractive power detection through various imaging techniques,a comprehensive systematic review on this topic is has yet be *** review aims to summarise and evaluate the performance of ocular image-based deep learning models in predicting refractive *** text:We search on three databases(PubMed,Scopus,Web of Science)up till June 2023,focusing on deep learning applications in detecting refractive error from ocular *** included studies that had.r.ported.r.fractive error outcomes,regardless of publication *** systematically extracted and evaluated the continuous outcomes(sphere,SE,cylind.r.and categorical outcomes(myopia),ground truth measurements,ocular imaging modalities,deep learning models,and performance metrics,adhering to PrISMA *** studies were identified and categorised into three groups:retinal photo-based(n=5),OCT-based(n=1),and external ocular photo-based(n=3).For high myopia prediction,retinal photo-based models achieved AUC between 0.91 and 0.98,sensitivity levels between 85.10%and 97.80%,and specificity levels between 76.40%and 94.50%.For continuous prediction,retinal photo-based models reported MAE ranging from 0.31d to 2.19d,and.r.(2) between 0.05 and *** OCT-based model achieved an AUC of 0.79–0.81,sensitivity of 82.30%and 87.20%and specificity of 61.70%–68.90%.For external ocular photo-based models,the AUC ranged from 0.91 to 0.99,sensitivity of 81.13%–84.00%and specificity of 74.00%–86.42%,MAE ranges from 0.07d to 0.18d and accuracy ranges from 81.60%to 96.70%.The reported papers colle

关键词： deep Learning Artificial Intelligence refractive Error retinal images Optical Coherence Tomography Photorefraction Ocular images Prediction

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