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Constructing mild expanded graphite microspheres by pressurized oxidation combined microwave treatment for enhanced lithium storage

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Rare Metals 2021年第4期40卷 837-847页

作者： Can-Liang Ma Zhen-hui Hu Ning-Jing Song Yun Zhao Yan-Zhen Liu hui-qi wang Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province Institute of Molecular ScienceShanxi UniversityTaiyuan 030006China College of Chemistry and Chemical Engineering Jinzhong UniversityJinzhong 030619China CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China School of Energy and Power Engineering School of Material Science and EngineeringNorth University of ChinaTaiyuan 030051China

The modified graphite anode materials have some prominent advantages over other anode materials in the industrial applications.A novel simple and gentle method is proposed to synthesize the mild expanded graphite microspheres(MEGMs) from flake graphite spheres through a combined modified pressurized oxidation combined with the microwave *** microstructural results demonstrate that moderately expanded MEGMs with an expansion volume between 4 and 10 ml·g^(-1)exhibit a highly microporous structure with an enlarged interlayer spacing,a decreased microcrystalline size,as well as an increased number of functional groups on the surface,resulting in the increased storage sites and spaces for lithium ions and the enhanced diffusion rate of lithium *** used as the anode material for lithium-ion batteries,the MEGM-T75t30 obtained by oxidation treatment at 75℃ for 30 min followed by microwave irradiation for expansion displays a high reversible capacity of 446.7 mAh·g^(-1) at 100 mA·g^(-1) after 100 cycles and excellent rate performance(330 and 116 mAh·g^(-1) at 800 and 3200 mA·g^(-1),respectively).Therefore,the MEGMs prepared by this convenient and mild method show excellent electrochemical properties and good application potential.

关键词： Pressurized oxidation Microwave treatment Mild expanded graphite microspheres Microstructure Graphitic anode material Lithium-ion battery

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Rational construction of densely packed Si/MXene composite microspheres enables favorable sodium storage

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Rare Metals 2022年第5期41卷 1626-1636页

作者： hui-qi wang Ya-Xin Zhao Li Gou Li-Yong wang Mei wang Ying Li Sheng-Liang Hu School of Energy and Power Engineering North University of ChinaTaiyuan 030051China School of Materials Science and Engineering North University of ChinaTaiyuan 030051China

The fast and reversible sodiation/desodiation of anode materials remains an indelible yet fascinating ***, a class of the densely packed Si/MXene composite microspheres is constructed and prepared, taking advantages of the synergistic effects of the activated Si nanoparticles and conductive flower-like MXene microspheres with ample ion-diffusion pathways. Consequently,the intrinsic MXene nanosheets with intelligently regulated interlayer spacing can accommodate the volume change induced strain during cycling, and the strong interaction between the Si and MXene matrix greatly contributes to the robust structural stability. As expected, the Si/MXene composite architecture exhibits boosted sodium storage performance, in terms of an inspiring reversible capacity of 751 mAh·g^(-1)at 0.1 A·g^(-1), remarkable long-term cycling stability of 376 mAh·g^(-1)at 0.1 A·g^(-1) over 500 cycles, and outstanding rate capability(after one consecutive current density changing from 0.1 to 2.0 A·g^(-1), a large capacity of 275 mAh·g^(-1) is regained after suddenly returning the initial current density back to 0.1 A·g^(-1) and in the subsequent 200 cycles this composite architecture anode still delivers a capacity of 332 mAh·g^(-1)). The kinetics analysis indicates superior pseudocapacitive property, high electronic conductivity, and favorable sodium-ion adsorption and diffusion capability,confirming fast sodium storage performance. Impressively, ex-situ X-ray diffraction and selected area electron diffraction characterizations corroborate the formation of NaSi;as the main sodiation products during the reversible evolutions of cycled proceeding with sodium-ion insertion. This work sheds light on the elaborate design of silicon-based nanostructured anodes towards advanced high-performance sodium-ion batteries.

关键词： Silicon MXene Composite microspheres Sodium-ion batteries Flower-like anode Efficient sodiumion storage

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Anti-self-discharge ultrathin all-inorganic electrochromic asymmetric supercapacitors enabling intelligent and effective energy storage

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Rare Metals 2023年第9期42卷 2957-2971页

作者： Lei Liu Chen Liu Meng-Ying wang Bin Li Ke wang Xiang-qian Fan Li-Yong wang hui-qi wang Sheng-Liang Hu Xun-Gang Diao School of Energy and Power Engineering North University of ChinaTaiyuan030051China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of ScienceShenyang110016China School of Energy and Power Engineering Beihang UniversityBeijing100191China Research Center for Photovoltaics Shanghai Institute of Space Power-SourcesShanghai200245China National Key Laboratory of Electromagnetic Space Security Tianjin300308China

Electrochromic asymmetric supercapacitors(EASs), incorporating electrochromic and energy storage into one platform, are extremely desirable for next-generation civilian portable and smart electronic devices. However, the crucial challenge of their fast self-discharge rate is often overlooked, although it plays an important role in practical application. Unfortunately, very limited research on EAS has focused on this critical problem. Here, an ultrathin all-inorganic EAS with excellent anti-self-discharge performance and superior electrochromic behavior is designed and manufactured by introducing a thin nanofunctional layer at the electrode/electrolyte interface. The prototype all-inorganic EAS exhibited a wide working voltage of 2.2 V, a high energy/power density(81.2mWh·cm^(-3)/0.688 W·cm^(-3)and 30.6 mWh·cm^(-3)/11.02W·cm^(-3)), along with outstanding electrochemical and electrochromic performance even at high ***, the introduced Ta2O5layer can efficiently prohibit the redistribution and diffusion of the movable ions at the fully charged state, endowing the all-inorganic EAS with a tardy self-discharge rate of 12.6 mV·g^(-1),which is an extremely low value when compared with previous reported research. Significantly, the ultrathin allinorganic EASs could also well maintain a slow self-discharge rate and their original electrochemical characteristics under various environmental temperatures. We envision that the novel strategy of electrode/electrolyte interface engineering can effectively deal with the severe self-discharge challenge of EAS, and provide more opportunities for their practical applications.

关键词： Anti-self-discharge Electrochromic Asymmetric supercapacitors(ASCs) All-inorganic Interface

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miR-30c promotes Schwann cell remyelination following peripheral nerve injury

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Neural Regeneration Research 2017年第10期12卷 1708-1715页

作者： Sheng Yi qi-hui wang Li-li Zhao Jing qin Ya-xian wang Bin Yu Song-lin Zhou Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education Co-innovation Center of NeuroregenerationNantong UniversityNantongJiangsu ProvinceChina

Differential expression of mi RNAs occurs in injured proximal nerve stumps and includes mi RNAs that are firstly down-regulated and then gradually up-regulated following nerve *** mi RNAs might be related to a Schwann cell phenotypic *** R-30 c,as a member of this group,was further investigated in the current ***-Dawley rats underwent sciatic nerve transection and proximal nerve stumps were collected at 1,4,7,14,21,and 28 days post injury for *** sciatic nerve injury,mi R-30 c was down-regulated,reaching a minimum on day 4,and was then upregulated to normal *** cells were isolated from neonatal rat sciatic nerve stumps,then transfected with mi R-30 c agomir and co-cultured in vitro with dorsal root *** enhanced expression of mi R-30 c robustly increased the amount of myelin-associated protein in the co-cultured dorsal root ganglia and Schwann *** then modeled sciatic nerve crush injury in vivo in Sprague-Dawley rats and tested the effect of perineural injection of mi R-30 c agomir on myelin sheath *** days after surgery,sciatic nerve stumps were harvested and subjected to immunohistochemistry,western blot analysis,and transmission electron *** direct injection of mi R-30 c stimulated the formation of myelin sheath,thus contributing to peripheral nerve ***,our findings indicate that mi R-30 c can promote Schwann cell myelination following peripheral nerve *** functional study of mi R-30 c will benefit the discovery of new therapeutic targets and the development of new treatment strategies for peripheral nerve regeneration.

关键词： nerve regeneration peripheral nerve regeneration peripheral nerve injury sciatic nerve mi RNAs mi R-30c dedifferentiation Schwann cells myelination in vivo in vitro neural regeneration

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Characterization of the Microstructure Changes of Polypropylene Induced by Pan-milling

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Chinese Journal of Structural Chemistry 2002年第1期21卷 7-12页

作者： LU Can-hui wang qi ( The state Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065 ) Polymer Research Institute Sichuan University The State Key Laboratory of Polymer Materials Engineering Chengdu 610065

The microstructure changes of polypropylene induced by a complex combination of shearing, friction, compression and stretching actions during pan-milling were revealed by spectroscopic techniques. X-ray diffraction analysis showed that the structure of polypropylene transferred from crystal into amorphous after undergoing enough milling operation. No transformation between crystal forms was observed. The study of the high-frequency region of the Raman spectrum between 2800 and 3100cm-1 of polypropylene indicated that molecular motion and chain deformation of PP led to amorphization and deterioration of packing regularity during pan-milling. By co-panmilling PP with bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate under ambient condition, ESR signals of free radicals formed by mechanochemical scission of main chain were observed, and an increase of ESR intensity with milling was detected.

关键词： polypropylene microstructure change mechanochemistry pan-milling

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Zoonotic origins of human coronavirus 2019(HCoV-19/SARS-CoV-2):why is this work important?

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Zoological Research 2020年第3期41卷 213-219页

作者： Gary Wong Yu-Hai Bi qi-hui wang Xin-Wen Chen Zhi-Gang Zhang Yong-Gang Yao CAS Key Laboratory of Molecular Virology&Immunology Institut Pasteur of ShanghaiChinese Academy of SciencesShanghai 200031China Department of Microbiology-Infectiology and Immunology Laval UniversityQuebec G1V 4G2Canada CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyCenter for Influenza Research and Early-warning(CASCIRE)CAS-TWAS Center of Excellence for Emerging Infectious Diseases(CEEID)Chinese Academy of SciencesBeijing 100101China State Key Laboratory of Virology Wuhan Institute of VirologyChinese Academy of SciencesWuhanHubei 430071China State key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan School of Life SciencesYunnan UniversityKunmingYunnan 650091China Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences and Yunnan Province Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650223China Kunming College of Life Science University of Chinese Academy of SciencesKunmingYunnan 650204China KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650223China

The ongoing pandemic of coronavirus disease 2019 (COVID-19), caused by infection with human coronavirus 2019 (HCoV-19/SARS-CoV-2/2019-nCoV), is a global threat to the human population. Here, we briefly summarize the available data for the zoonotic origins of HCoV-19, with reference to the other two epidemics of highly virulent coronaviruses, SARSCoV and MERS-CoV, which cause severe pneumonia in humans. We propose to intensify future efforts for tracing the origins of HCoV-19, which is a very important scientific question for the control and prevention of the pandemic.

关键词： origin why is this work important HCoV-19/SARS-CoV-2 Zoonotic origins of human coronavirus 2019

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Transcription factor networks involved in cell death in the dorsal root ganglia following peripheral nerve injury

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Neural Regeneration Research 2018年第9期13卷 1622-1627页

作者： Jing qin Jian-Cheng Wu qi-hui wang Song-Lin Zhou Su-Su Mao Chun Yao Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education Co-innovation Center of NeuroregenerationNantong University Department of Pathological Anatomy Nantong University

The peripheral nervous system has the potential to regenerate after nerve injury owing to the intrinsic regrowth ability of neurons and the permissive *** regenerative process involves numerous gene expression changes,in which transcription factors play a critical ***,we profiled dysregulated genes in dorsal root ganglion neurons at different time points（0,3 and 9 hours,and 1,4 and 7 days） after sciatic nerve injury in rats by RNA *** the present study,we investigated differentially expressed transcription factors following nerve injury,and we identified enriched molecular and cellular functions of these transcription factors by Ingenuity Pathway *** analysis revealed the dynamic changes in the expression of transcription factors involved in cell death at different time points following sciatic nerve *** addition,we constructed regulatory networks of the differentially expressed transcription factors in cell death and identified some key transcription factors（such as STAT1,JUN,MYC and IRF7）.We confirmed the changes in expression of some key transcription factors（STAT1 and IRF7） by quantitative reverse transcription-polymerase chain ***,our analyses provide a global overview of transcription factor changes in dorsal root ganglia after sciatic nerve injury and offer insight into the regulatory transcription factor networks involved in cell death.

关键词： nerve regeneration cell death transcription factors dorsal root ganglia neurons peripheral nerve injury sciatic nerve ingenuitypathway analysis Cytoscape bioinformatics analysis STAT1 IRF7 neural regeneration

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A pulmonary source of infection in patients with sepsis-associated acute kidney injury leads to a worse outcome and poor recovery of kidney function

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World Journal of Emergency Medicine 2020年第1期11卷 18-26页

作者： Yi-wen Fan Shao-wei Jiang Jia-meng Chen hui-qi wang Dan Liu Shu-ming Pan Cheng-jin Gao Department of Emergency Medicine Xinhua Hospital Shanghai Jiaotong University School of Medicine

BACKGROUND:Hospital mortality rates are higher among patients with sepsis-associated acute kidney injury(SA-AKI)than among patients with ***,the pathogenesis underlying SA-AKI remains *** hypothesized that the source of infection affects development of *** aim to explore the relationship between the anatomical source of infection and outcome in patients with ***:Between January 2013 and January 2018,113 patients with SA-AKI admitted to our Emergency Center were identifi ed and divided into two groups:those with pulmonary infections and those with other sources of *** each patient,we collected data from admission until either discharge or *** also recorded the clinical outcome after 90 days for the discharged ***:The most common source of infection was the lung(52/113 cases,46%),followed by gastrointestinal(GI)(25/113 cases,22.1%)and urinary(22/113,19.5%)*** analysis showed that patients with SA-AKI had a significantly worse outcome(30/52 cases,P<0.001)and poorer kidney recovery(P=0.015)with pulmonary sources of infection than those infected by another *** also showed that patients not infected by a pulmonary source more likely experienced shock(28/61 cases,P=0.037).CONCLUSION:This study demonstrated that the source of infection infl uenced the outcome of SA-AKI patients in an independent *** injury may influence renal function in an asyet undetermined manner as the recovery of kidney function was poorer in SA-AKI patients with a pulmonary source of infection.

关键词： Sepsis Infection source Acute kidney injury Lung injury Renal function

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Simulation study of transverse optical klystron radiation

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Nuclear Science and Techniques 1997年第4期 8-11页

作者： Xu Hong Liang, Diao Cao Zheng, Liu Jin Ying, He Duo hui, Jia qi Ka and wang Xiang qi ( National Synchrotron Radiation Laboratory,University of Science and Technology of China Hefei 230027, China )

ＳｉｍｕｌａｔｉｏｎｓｔｕｄｙｏｆｔｒａｎｓｖｅｒｓｅｏｐｔｉｃａｌｋｌｙｓｔｒｏｎｒａｄｉａｔｉｏｎＸｕＨｏｎｇＬｉａｎｇ，ＤｉａｏＣａｏＺｈｅｎｇ，ＬｉｕＪｉｎＹｉｎｇ，ＨｅＤｕｏＨｕｉ，ＪｉａＱｉＫ... 详细信息

ＳｉｍｕｌａｔｉｏｎｓｔｕｄｙｏｆｔｒａｎｓｖｅｒｓｅｏｐｔｉｃａｌｋｌｙｓｔｒｏｎｒａｄｉａｔｉｏｎＸｕＨｏｎｇＬｉａｎｇ，ＤｉａｏＣａｏＺｈｅｎｇ，ＬｉｕＪｉｎＹｉｎｇ，ＨｅＤｕｏＨｕｉ，ＪｉａＱｉＫａａｎｄＷａｎｇＸｉａｎｇＱｉ（...

关键词： Spontaneous emission Monte Carlo simulation Emittance Energy spread

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腔内CdTe电光调QCO_2窄脉冲激光外差信号特性分析

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中国激光 2001年第12期28卷 1085-1088页

作者：王春晖王骐李琦陆威哈尔滨工业大学光电子技术研究所哈尔滨150001

较详细地研究了腔内CdTe电光调QCO2 窄脉冲激光及其外差信号的时域频域特性,发现它的激光脉冲时域波形有很长的拖尾,拖尾持续时间与CdTe晶体外触发电压开关宽度有关,触发宽度越宽拖尾越长,反之则短。进行了调QCO2 脉冲激光微弱信号检测... 详细信息

较详细地研究了腔内CdTe电光调QCO2 窄脉冲激光及其外差信号的时域频域特性,发现它的激光脉冲时域波形有很长的拖尾,拖尾持续时间与CdTe晶体外触发电压开关宽度有关,触发宽度越宽拖尾越长,反之则短。进行了调QCO2 脉冲激光微弱信号检测实验,即将脉冲激光衰减到用直接探测方法无法检测的程度,此时再用外差检测方法,在脉冲包络之内及其拖尾部分观察到了较强的外差中频信号,从实验上验证了外差探测灵敏度远远高于直接探测。根据该激光脉冲拖尾持续时间部分可控的特性,从理论上讨论了CO2

关键词：外差探测光电调Q脉冲激光雷达 CdTe

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