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Extending the solid solution range of sodium ferric pyrophosphate:Off‐stoichiometric Na_(3)Fe(2.5)(P_(2)O_(7))_(2)as a novel cathode for sodium‐ion batteries

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Carbon Energy 2024年第4期6卷 128-139页

作者： Xiang jun Pu Kunran Yang Zibing Pan Chunhua Song yangyang lai Renjie Li Zheng‐Long Xu Zhongxue Chen Yuliang Cao Hubei Key Laboratory of Electrochemical Power Sources College of Chemistry and Molecular SciencesWuhan UniversityWuhanChina Key Laboratory of Hydraulic Machinery Transients Ministry of EducationSchool of Power and Mechanical EngineeringWuhan UniversityWuhanChina School of Chemistry and Chemical Engineering Jiangsu University of TechnologyChangzhouJiangsuChina Zonergy Corporation ZigongSichuanChina Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHung HomHong Kong SARChina

Iron‐based pyrophosphates are attractive cathodes for sodium‐ion batteries due to their large framework,cost‐effectiveness,and high energy ***,the understanding of the crystal structure is scarce and only a limited candidates have been reported so *** this work,we found for the first time that a continuous solid solution,Na_(4−α)Fe_(2+α)_(2)(P_(2)O_(7))_(2)(0≤α≤1,could be obtained by mutual substitution of cations at center‐symmetric Na3 and Na4 sites while keeping the crystal building blocks of anionic P_(2)O_(7) *** particular,a novel off‐stoichiometric Na_(3)Fe(2.5)(P_(2)O_(7))_(2)is thus proposed,and its structure,energy storage mechanism,and electrochemical performance are extensively investigated to unveil the structure–function *** as‐prepared off‐stoichiometric electrode delivers appealing performance with a reversible discharge capacity of 83 mAh g^(−1),a working voltage of 2.9 V(***^(+)/Na),the retention of 89.2%of the initial capacity after 500 cycles,and enhanced rate capability of 51 mAh g^(−1)at a current density of 1600 mA g^(−1).This research shows that sodium ferric pyrophosphate could form extended solid solution composition and promising phase is concealed in the range of Na_(4−α)Fe_(2+α)_(2)(P_(2)O_(7))_(2),offering more chances for exploration of new cathode materials for the construction of high‐performance SIBs.

关键词： extending solid‐solution range off‐stoichiometric Na_(3)Fe_(2.5)(P_(2)O_(7))_(2) sodium‐ion batteries structure-function relationship

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铁铜改性稻壳炭对双氯芬酸钠吸附性能

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环境工程学报 2024年第3期18卷 737-746页

作者：裴曼一李梅裴建川杨金艳单骁郑砚石赖阳阳宋博涵梁佳雨浙江农林大学环境与资源学院碳中和学院杭州311300 临安区市政公用和市容环境卫生保障中心杭州311300

以稻壳为原料制备铁铜改性生物炭(FCBC300),采用扫描电子显微镜、元素组成分析仪、X-射线衍射光谱仪、傅里叶红外光谱仪对其进行了系列基础理化性质表征,通过批量吸附实验研究了FCBC300在不同pH和干扰离子及有机物腐殖酸(HA)等条件下对... 详细信息

以稻壳为原料制备铁铜改性生物炭(FCBC300),采用扫描电子显微镜、元素组成分析仪、X-射线衍射光谱仪、傅里叶红外光谱仪对其进行了系列基础理化性质表征,通过批量吸附实验研究了FCBC300在不同pH和干扰离子及有机物腐殖酸(HA)等条件下对双氯芬酸钠(DCF)的去除效果和吸附机制。结果表明,改性后稻壳炭表面负载Fe_(3)O_(4)、γ-Fe_(2)O_(3)和CuO,芳香性增强、亲水性降低,对DCF的吸附性能大幅度提升。pH=5~9条件下,改性稻壳炭对DCF的吸附量约是未改性稻壳炭的20倍,吸附机制以静电作用为主;PO_(4)^(3-)的存在对吸附几乎无影响,SO_(4)^(2-)、Cl^(-)和HCO_(3)^(-)-对DCF的去除虽有轻微抑制作用,但去除率下降幅度均低于5%,HA存在则明显抑制吸附能力;FCBC300对DCF的吸附过程,更符合准一级动力学模型和Langmuir等温吸附模型,预测最大吸附量为476.1905 mg·g^(-1)。综上所述,FCBC300体现出良好的pH缓冲性、抗离子干扰性和高吸附性能,在废水处理中有较好的应用前景。

关键词：稻壳生物炭改性双氯芬酸钠吸附

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Boosting rate and cycling performance of K-doped Na_(3)V_(2)(PO_(4))_(2)F_(3) cathode for high-energy-density sodium-ion batteries

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Green Energy & Environment 2022年第6期7卷 1253-1262页

作者： Jiexin Zhang yangyang lai Peng Li Yanxia Wang Faping Zhong Xiangming Feng Weihua Chen Jianjun Liu Xinping Ai Hanxi Yang Yuliang Cao Engineering Research Center of Organosilicon Compounds&Materials of Ministry of Education College of Chemistry and Molecular SciencesWuhan UniversityWuhan430072China National Engineering Research Center of Advanced Energy Storage Materials Hunan410205China College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou450001China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of Sciences1295 Dingxi RoadShanghai200050China

As a promising cathode material,Na_(3)V_(2)(PO_(4))_(2)F_(3)(NVPF)has attracted wide attention for sodium-ion batteries(SIBs)because of its high operating voltage and high structural ***,the low intrinsic electronic conductivity and insufficient Na ion mobility of NVPF limit its ***,K-doping NVPF is prepared through a facile ball-milling combined calcination *** effects of K-doping on the crystal structure,kinetic properties and electrochemical performance are *** results demonstrate that the Na_(2.90)K_(0.10)V_(2)(PO_(4))_(3)F_(3)(K0.10-NVPF)exhibits a high capacity(120.8 mAh g^(-1) at 0.1 C),high rate capability(66 mAh g^(-1) at 30 C)and excellent cycling performance(a capacity retention of 97.5%at 1 C over 500 cycles).Also,the occupation site of K ions in the lattice,electronic band structure and Na-ion transport kinetic property in K-doped NVPF are investigated by density functional theory(DFT)calculations,which reveals that the K-doped NVPF exhibits improved electronic and ionic conductivities,and located K^(+) ions in the lattice to contribute to high reversible capacity,rate capability and cycling ***,the K-doped NVPF serves as a promising cathode material for high-energy and high-power SIBs.

关键词： Potassium doping Na_(3)V_(2)(PO_(4))_(2)F_(3) Cathode materials Sodium ion batteries Long-term stability

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基质粒径与植株密度对人工湿地净化渗滤液荧光及微生物特性的影响

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广东化工 2024年第12期51卷 116-119,107页

作者：钟铃单骁裴梓恒杨金艳赖阳阳裴曼一宋博涵李梅浙江农林大学浙江杭州311300 杭州市临安区市政公用和市容环境卫生保障中心浙江杭州311300

为了揭示基质粒径、植株密度对人工湿地净化垃圾渗滤液有机物效果的影响,以陶粒、黄菖蒲为试验材料,构建了粒径20 mm+植株密度50株/m^(2)(K1)、粒径20 mm+植株密度75株/m^(2)(K2)、粒径5 mm+植株密度50株/m^(2)(K3)3个人工湿地处理系统... 详细信息

为了揭示基质粒径、植株密度对人工湿地净化垃圾渗滤液有机物效果的影响,以陶粒、黄菖蒲为试验材料,构建了粒径20 mm+植株密度50株/m^(2)(K1)、粒径20 mm+植株密度75株/m^(2)(K2)、粒径5 mm+植株密度50株/m^(2)(K3)3个人工湿地处理系统,采用三维荧光和变性梯度凝胶电泳技术对其进行分析。结果表明,溶解性有机物(DOM)去除率、荧光强度、微生物多样性及结构粒径间K1与K3差异显著,不同植株密度间K1与K2之间荧光强度、微生物多样性差异显著。粒径变小可显著提高有机物净化,经过21天净化后,K3对DOM的去除率比K1高出29.72%(P<0.05),荧光强度下降5.04(P<0.01),粒径对微生物结构变化影响的贡献率高达57%(P=0.048);植株密度亦可促进有机物去除,显著增加微生物多样性与结构,K2相比K1 f450/500降幅达0.72。表明在应用人工湿地净化垃圾渗滤液时,可通过降低粒径基质与提高密度植株的方式,提升系统微生物丰度及结构多样性,促进有机污染物的去除。

关键词：基质粒径植株密度人工湿地垃圾渗滤液三维荧光微生物群落

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Protective eff ect and mechanism of nanoantimicrobial peptide ND-C14 against Streptococcus pneumoniae infection

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World Journal of Emergency Medicine 2024年第1期15卷 28-34页

作者： yangyang Guo Yaqi Sun Hongxia Wu Jian Lu Yuan Lin Jiaqing Zhu Meihong lai Meiqi Zhang Jun Wang Jungang Zheng Department of Intensive Care Medicine Hangzhou Traditional Chinese Medicine Hospital Affi liated to Zhejiang Chinese Medical UniversityHangzhou 310021China National Children’s Regional Medical Center National Clinical Research Center for Child HealthChildren’s HospitalZhejiang University School of MedicineHangzhou 310052China Department of Spleen and Stomach Diseases Hangzhou Traditional Chinese Medicine Hospital Affi liated to Zhejiang Chinese Medical UniversityHangzhou 310021China Department of Ultrasonic Medicine the First Affi liated Hospital of Ningbo UniversityNingbo 315010China Department of Anesthesiology the First Affi liated Hospital of Ningbo UniversityNingbo 315010China Zhejiang University School of Medicine Hangzhou 310058China The First People’s Hospital of Yuexi County Yuexi 616650China

BACKGROUND:Streptococcus pneumoniae(***)is a common pathogen that causes bacterial ***,with increasing bacterial resistance,there is an urgent need to develop new drugs to treat *** *** with a 14-carbon saturated fatty acid(ND-C14)is a novel nanoantimicrobial peptide designed by modifying myristic acid at the C-terminus of humanα-defensin 5(HD5)via an amide ***,it is unclear whether ND-C14 is effective against lung infections caused by ***:In vitro,three groups were established,including the control group,and the HD5 and ND-C14 treatment groups.A virtual colony-count assay was used to evaluate the antibacterial activity of HD5 and ND-C14 against *** morphological changes of *** treated with HD5 or ND-C14 were observed by scanning electron *** vivo,mice were divided into sham,vehicle,and ND-C14 treatment *** in the sham group were treated with 25μL of phosphate-buffered saline(PBS).Mice in the vehicle and ND-C14 treatment groups were treated with intratracheal instillation of 25μL of bacterial suspension with 2×108 CFU/mL(total bacterial count:5×10^(6) CFU),and then the mice were given 25μL PBS or intratracheally injected with 25μL of ND-C14(including 20μg or 50μg),*** rates were evaluated in the vehicle and ND-C14 treatment *** burden in the blood and bronchoalveolar lavage fluid were *** lung histology of the mice was assessed.A propidium iodide uptake assay was used to clarify the destructive eff ect of ND-C14 against ***:Compared with HD5,ND-C14 had a better bactericidal eff ect against *** because of its stronger ability to destroy the membrane structure of *** in *** vivo,ND-C14 significantly delayed the death time and improved the survival rate of mice infected with ***-C14 reduced bacterial burden and lung tissue ***,ND-C14 had a membrane per

关键词： Streptococcus pneumoniae Antimicrobial peptides Humanα-defensin 5 Infection

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Improved Initial Charging Capacity of Na-poor Na0.44MnO2 via Chemical Presodiation Strategy for Low-cost Sodium-ion Batteries

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Chemical Research in Chinese Universities 2021年第2期37卷 274-279页

作者： ZHOU Xi lai yangyang WU Xiangjiang CHEN Zhongxue ZHONG Faping Al Xinping YANG Hanxi CAO Yuliang Engineering Research Center of Organosilicon Compounds and Materials of Ministry of Education College of Chemistry and Molecular SciencesWuhan UniversityWuhan430072P.R.China Key Laboratory of Hydraulic Machinery Transients Ministry of EducationSchool of Power and Mechanical EngineeringWuhan UniversityWuhan430072P.R.China National Engineering Research Center of Advanced Energy Storage Materials Hunan410205P.R.China

Sodium-ion batteries(SIBs)are promising for grid-scale energy storage applications due to the natural abundance and low cost of *** various Na insertion cathode materials,Na0.44MnO2 has attracted the most attention because of its cost effectiveness and structural ***,the low initial charge capacity for Na-poor Na0.44MnO2 hinders its practical ***,we developed a facile chemical presodiated method using sodiated biphenly to transform Na-poor Na0.44MnO2 into Na-rich *** presodiation,the initial charge capacity of Na0.44MnO2 is greatly enhanced from 56.5 mA·h/g to 115.7 mA·h/g at 0.1 C(1 C=121 mA/g)and the excellent cycling stability(the capacity retention of 94.1%over 200 cycles at 2 C)is *** presodiation strategy would open a new avenue for promoting the practical applications of Na-poor cathode materials in sodium-ion batteries.

关键词： Sodium-ion battery Na0.44MnO2 Chemical presodiation Sodium biphenyl Initial charge capacity

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Power Flow Analytical Solutions and Multi-dimensional Voltage Stability Boundaries Based on Multivariate Quotient-difference Method

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1168-1178页

作者： Chengxi Liu Qiupin lai School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network Wuhan 430072China IEEE

This paper proposes a novel Multivariate Quotient-Difference(MQD)method to obtain the approximate analytical solution for AC power flow ***,in the online environment,the power flow solutions covering different operating conditions can be directly obtained by plugging values into multiple symbolic variables,such that the power injections and consumptions of selected buses or areas can be independently *** method first derives a power flow solution through a Multivariate Power Series(MPS).Next,the MQD method is applied to transform the obtained MPS to a Multivariate Pad´e Approximants(MPA)to expand the Radius of Convergence(ROC),so that the accuracy of the derived analytical solution can be significantly *** addition,the hypersurface of the voltage stability boundary can be identified by an analytical formula obtained from the coefficients of *** direct method for power flow solutions and voltage stability boundaries is fast for many online applications,since such analytical solutions can be derived offline and evaluated online by only plugging values into the symbolic variables according to the actual operating *** proposed method is validated in detail on New England 39-bus and IEEE 118-bus systems with independent load variations in multi-regions.

关键词： Analytical power flow solution multivariate power series multivariate Padéapproximants multivariate quotient-difference multi-dimensional voltage stability boundary

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Preface to the Special Issue:Additive Manufacturing—Expanding Production Horizon

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Acta Metallurgica Sinica(English Letters) 2024年第1期37卷 1-2页

作者： lai-Chang Zhang Centre for Advanced Materials and Manufacturing School of EngineeringEdith Cowan University270 Joondalup DriveJoondalupPerthWA6027Australia

Additive manufacturing(AM),commonly known as 3D printing,has become a transformative technology that has a profound impact on various industrial *** encompasses a set of techniques for building objects layer by layer from digital *** conventional subtractive manufacturing methods that involve removing material from large blocks,AM adds material incrementally,providing unprecedented design flexibility and efficiency.

关键词： removing printing Expanding

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Remote sensing image encryption algorithm utilizing 2D Logistic memristive hyperchaotic map and SHA-512

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Science China(Technological Sciences) 2024年第5期67卷 1553-1566页

作者： lai Qiang LIU Yuan YANG Liang School of Electrical and Automation Engineering East China Jiaotong UniversityNanchang330013China

The two-dimensional Logistic memristive hyperchaotic map(2D-LMHM)and the secure hash SHA-512 are the foundations of the unique remote sensing image encryption algorithm(RS-IEA)suggested in this *** proposed map is formed from the improved Logistic map and the memristor,which has wide phase space and hyperchaotic range and is exceptionally excellent to be utilized in specific *** proposed image algorithm uses the permutation-assignment-diffusion *** generates two position matrices in a progressive manner to achieve an efficient random exchange of pixel positions,assignment is carried through on the image pixels of the permutated image to entirely remove the original image information,strengthening the relationship between permutation and diffusion,and loop diffusion in two different directions can use subtle changes of pixels to affect the whole *** random key and plain-image SHA-512 hash values are used to produce an additional key,which is then utilized to figure out the permutation parameters and the initial value of a chaotic *** experimental results with the average NPCR=99.6094%(NPCR:number of pixels change rate),average UACI=33.4638%(UACI:unified average changing intensity),100%pass rate of the targets in the test set,the average correlation coefficient is 0.00075,and the local information entropy is 7.9025,which shows that the algorithm is able to defend against a variety of illegal attacks and provide more trustworthy protection than some of the existing state-of-the-art algorithms.

关键词： chaos memristive hyperchaotic map remote sensing SHA-512 image encryption RS-IEA

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Mechanical Performance of Bio-inspired Bidirectional Corrugated Sandwich Pressure Shell Under External Hydrostatic Pressure

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China Ocean Engineering 2024年第2期38卷 297-312页

作者： ZHANG Yi CHEN Yue YUN lai LIANG Xu Ocean College Zhejiang UniversityZhoushan 316000China Hainan Institute Zhejiang UniversitySanya 572000China

This paper aims to enhance the compression capacity of underwater cylindrical shells by adopting the corrugated sandwich structure of *** cuttlebone suffers uniaxial external compression,while underwater cylindrical shells are in a biaxial compressive stress *** suit the biaxial compressive stress state,a novel bidirectional corrugated sandwich structure is proposed to improve the bearing capacity of cylindrical *** static and buckling analysis for the sandwich shell and the unstiffened cylindrical shell with the same volume-weight ratio are studied by numerical *** is indicated that the proposed sandwich shell can effectively reduce the ratio between circumferential and axial stress from 2 to 1.25 and improve the critical buckling load by about 1.63 *** simulation shows that optimizing and adjusting the structural parameters could significantly improve the advantage of the sandwich ***,the hydrostatic pressure tests for shell models fabricated by 3D printing are carried *** to the experimental results,the overall failure position of the sandwich shell is at the center part of the sandwich *** has been found the average critical load of the proposed sandwich shell models exceeds two times that of the unstiffened shell ***,the proposed bio-inspired bidirectional corrugated sandwich structure can significantly enhance the pressure resistance capability of cylindrical shells.

关键词： bio-inspiration bidirectional corrugation sandwich shell external pressure buckling

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