Mechanical properties of individual core-shell-structured Sn O2@C nanofibers investigated by atomic force microscopy and finite element method

Although SnO_2-based nanomaterials used to be considered as being extraordinarily versatile for application to nanosensors,microelectronic devices, lithium-ion batteries, supercapacitors and other devices, the functionalities of SnO_2-based nanomaterials are severely limited by their intrinsic vulnerabilities. Facile electrospinning was used to prepare SnO_2 nanofibers coated with a protective carbon layer. The mechanical properties of individual core-shell-structured SnO_2@C nanofibers were investigated by atomic force microscopy and the finite element method. The elastic moduli of the carbon-coated SnO_2 nanofibers remarkably increased, suggesting that coating SnO_2 nanofibers with carbon could be an effective method of improving their mechanical properties.     

CuS Electrode for All-pH Electrolyte in Aqueous Batteries

With their excellent safety, affordability, environmental friendliness and high ionic conductivity, aqueous batteries are prospective contenders to replace lithium-ion batteries. However, the pH of aqueous electrolyte might impact the battery’s electrochemical performance and even its normal operation. It is critical to develop an electrode that can work in different pH settings. The hydrothermal method and vulcanization treatment were used to successfully create copper sulfide(CuS) nanosheet in...     

Mechanical properties of individual core-shell-structured SnO<Subscript>2</Subscript>@C nanofibers investigated by atomic force microscopy and finite element method

Although SnO₂-based nanomaterials used to be considered as being extraordinarily versatile for application to nanosensors, microelectronic devices, lithium-ion batteries, supercapacitors and other devices, the functionalities of SnO₂-based nanomaterials are severely limited by their intrinsic vulnerabilities. Facile electrospinning was used to prepare SnO₂ nanofibers coated with a protective carbon layer. The mechanical properties of individual core-shell-structured SnO₂@C nanofibers were investigated by atomic force microscopy and the finite element method. The elastic moduli of the carbon-coated SnO₂ nanofibers remarkably increased, suggesting that coating SnO₂ nanofibers with carbon could be an effective method of improving their mechanical properties.     

MOFs及其衍生物在锂硫电池正极中的应用

锂硫电池因高比容量、高能量密度、低成本和环境友好等显著优点，有望成为取代锂离子电池的下一代高比能电池。然而，锂硫电池的实际应用严重受限于电极材料中存在的系列问题，如较低的离子/电子传导性、多硫化物的穿梭效应、充放电中较大的体积变化和锂负极的稳定性等。将硫与各类载体材料结合来提高活性材料的利用率和电池循环稳定性成为当前的研究热点。在已报道的各类载体材料中，具有丰富的孔道和开放活性位点的金属有机框架及其衍生物材料因其优异的结构特点引起了人们的广泛关注。总结了金属有机框架及其衍生物在提高硫正极循环稳定性中的应用进展，并对其在锂硫电池中的发展趋势进行了展望。     

High-energy cathode materials for Li-ion batteries: A review of recent developments

Lithium ion batteries(LIBs) represent one of the most promising solutions for environmentally friendly transportation such as electric vehicles. The demand for high energy density, low cost and environmentally friendly batteries makes high-capacity cathode materials very attractive for future LIBs. Layered Li NixCoyMnzO2(x+y+z=1), Li-rich oxides and Li-V-O compounds have attracted much attention due to their high capacities in recent years. In this review, we focus on the state-of-the-art research activities related to Li NixCoyMnzO2, Li-rich oxides and Li-V-O compounds, including their structures, reaction mechanisms during cycling, challenges and strategies that have been studied to improve their electrochemical performances.     

功能性建筑用钢筋的研究现状及发展趋势

热轧带肋钢筋是重要的建筑用钢之一,我国在推广应用高强钢筋的同时也越来越注重其抗震、耐蚀、防火等功能性。从抗震、耐蚀两个方面综述了建筑用热轧带肋钢筋功能性的研究现状,展望了功能性钢筋的发展趋势,并对功能性钢筋开发和应用工作提出了建议。     

基于可视化分析辅助探究钠离子电池硬碳负极研究进展

钠离子电池因成本低、安全性高等优势，已经成为当前储能领域的研究热点。为了明确钠离子电池硬碳负极的发展历程，解决钠离子电池初始库伦效率低、稳定性差以及高倍率性能差等问题，探索了硬碳中钠离子储存机制；运用CiteSpace可视化分析了钠离子电池的发展沿程，从材料设计、结构调控、功能设计及界面优化3个方面综述了硬碳负极的性能优化策略研究进展，并对现存硬碳储钠机制进行了总结与探讨。最后，对钠离子电池硬碳负极的发展方向进行了展望。     

废电池的回收和综合利用

介绍了回收利用锌锰干电池的湿法冶金法、常压冶金法、真空冶金法;回收利用镍铬干电池的干法、湿法;回收利用铅蓄电池还原工艺的湿法.     

锂电池混合盐体系的界面作用及研究进展

为进一步提升锂电池的能量密度,解决常规单盐电解质存在的热稳定性差、电导率低、锂枝晶等问题,发展新型混合盐电解质成为锂电池电解质重要的研究方向之一,锂盐的混合可以改变溶液离子电导率、锂离子溶解度、黏度等性质,通过对电极/电解质界面以及电极材料表界面的影响来改善电池电化学性能.本文收集整理国内外最新研究文献,综述了锂电池混...     

煤基碳负极材料在锂离子电池中的应用研究进展

随着碳达峰、碳中和成为全球共识,电化学储能技术和相关产业得到了飞速发展,与此同时电极材料的需求也与日俱增。因此,如何利用来源广泛、成本低廉的前驱体制备高性能负极材料成为国内外研究的热点。煤炭因具有碳含量高、储量丰富和价格低廉等特点成为最有潜力的负极材料前驱体。近年来,研究者以煤炭为原料制备了无定型碳、石墨、碳纳米管和石墨烯等负极材料,并对其在锂离子电池中的应用进行了深入研究。总结了三类典型的煤基碳负极材料在锂离子电池中应用的研究进展,并对其合成方法、优化改性及电化学性能等方面进行了综述,最后对煤基碳负极材料的发展及应用进行了展望。     

Structure improvement and electrochemical studies of bipolar nickel metal hydride batteries for hybrid electric vehicles

Inrecentyears,globalenvironmentalpollutionproblemssuchasacidrain,greenhouseeffectandairpollutionbecomemoreandmoreserious,especiallyinbigcities[1].Thedevelopmentandcommercializationofelectricvehiclesandhybridelectricvehiclesisakeyfactorintheresolutionofthesematters[2].However,thefinalacceptanceofthesezero emissionvehiclesdependsstronglyontheperformanceofbatteries.Ni/MHispres entlythemostpromisingbatterysystemforhybridvehi clespropulsionintheshortandmid term,whichhasmanyadvantagessuchashighener…     

Recycling of Spent Nickel-Cadmium Batteries

A technique for recycling spent nickel-cadmium batteries, which makes separaion of cadmium and nickel possible, is developed by laboratory-scale experiments. NH3-H2CO3 aqueous solution was used in this leaching technique. Since neutralization and/or solvent extraction were not required in the separation procedure of nickel and cadmium, the closed systemizaion of the process becomespossible. Experimental results show that, (1) if the NH3 concentraion of leaching solution is sufficiently high and the ratio of H2CO3 toNH3 is properly adjusted, both Ni(OH)2 and Cd(OH)2 react with NH, and quickly dissolve into leaching solution, and (2) Ni(OH)2 can beconverted into insoluble NiO by calcination at 500℃, and CdO from Cd(OH)2 by calcination maintains good solubility in NH3-H2CO3aqueous solution. As a conclusion, the recycling technique characterized by two step leaching can be developed based on such changesin dissolution behavior by calcination. Meanwhile, the yields of 99.8% for nickel and 97.6% for cadmium are obtained, and the puritiesof Recycling of Spent Nickel-Cadmium BatterieRecycling of Spent Nickel-Cadmium Batteries Recycling of Spent Nickel-Cadmium Batteriesrecovered nickel and cadmium are 99.9% and 98.6%, respectively.     

预防蓄电池过放电保护电路

用蓄电池做后备电源的系统 (或设备 ) ,常因过放电导致电池提前报废而造成设备故障 .根据电池电压随容量变化的规律 ,利用电压比较器和电压基准源设计制作了电池放电保护电路 ,当电池放电量接近容量的 5 0 %时 ,启动预警信号 ;当电池放电量达到容量的 80 %时 ,电路自动切断负载 ,防止电池过度放电 ,延长电池寿命 ,保证系统 (或设备 )在供电恢复正常后能正常运行 .     

镍氢动力串联电池组均衡充电方法研究

指出串联电池组的不一致性产生的原因.研究了基于拓朴结构分类的集中式均衡充电方法和独立式均衡充电方法,通过对上述方法的对比分析,提出了分散-集中式二级均衡充电方法,它适用于对串联电池数目比较大的混合动力电池组进行均衡充电.用此方法对MH-Ni电池组进行充电均衡仿真实验,结果表明用该方法进行均衡充电效果良好.     

国产450A-600V车用智能功率模块的研发

基于国内封装厂商的六合一IGBT模块GD450HTT60C7S,额定值为450A/600V。采用某款驱动IC设计了该IPM模块的智能驱动和保护电路,实现了包括控制电压源欠压保护、过流/短路保护和过温保护功能。IPM的控制接口采用较为常用的方形截面的排针结构,与高压相连的驱动电源和低压的PWM信号在空间上充分隔离。该IPM已经成功用于一款高功率密度的车用集成控制器。     

电动车用动力电池的研究概况

为了解决环境与噪音污染以及能源危机问题，世界上许多国家都投入了大量人力物力进行电动车及动力电源的研究．综述了电动车用动力电池的基本情况，对目前研究开发较多的几种电动车电池的性能进行了阐述和比较，指出了电动车电池发展过程中存在的问题，并结合自己的研究实际，提出了一些解决这些问题的对策，最后展望了电动车用动力电池的发展前景，希望能对我国电动车及动力电源的研究工作提供有意义的参考．     

钠离子电池正极材料研究进展

面对化石燃料日益枯竭、锂资源短缺等问题,钠离子电池以资源丰富、理论成本低、快充性能好、低温性能优异等优势被认为是发展新能源、大规模储能和低速电动交通工具中具有较大潜力的二次电池。钠离子电池正极材料是影响电池能量密度、循环性能、倍率性能等参数的重要因素之一,钠离子电池正极材料包括过渡金属氧化物、聚阴离子类化合物、普鲁士蓝类化合物和有机类化合物。总结并介绍了钠离子正极材料,概括了钠离子电池的优劣势,分析了各类正极材料的自身特性和研究方向,对钠离子电池正极材料的发展方向进行了展望。     

锂离子电池负极材料的研究现状及研究方向

在简要介绍锂离子电池的工作原理的基础上,对锂离子电池负极材料的研究现状进行分析,比较各种负极材料的优缺点,并对未来的研究方向进行展望,指出对各类锂离子电池负极材料,应该结合其优缺点,有针对性和侧重点地单独研发,如开发高容量型合金负极、高功率/高安全型钛酸锂负极以及低成本型金属氧化物负极材料。     

锂离子电池用高容量合金类硅基负极材料研究进展

锡、硅负极材料由于具有高的比容量等优点,成为提高锂离子电池能量密度的首选负极材料。首先介绍了目前产业界开发锡、硅负极材料的进展,并从商业化的角度比较了这两类材料在开发工艺及实际使用电性能方面的区别。进一步从基础研发角度重点阐述了不同结构的硅基材料(单质硅、硅氧化物、硅碳复合物及硅合金)的电性能改性研究进展,指出了具有工业化前景的工艺方法。     

Study of the Charge Acceptance of Small-Size Sealed Lead-Acid Batteries

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