基于ECT的聚合物锂电池组内部电容率检测装置设计

针对聚合物锂电池组温度分布均匀性难以全面、准确评估的问题,应用电容层析成像检测电池组内部电容率以间接实现电池组温度分布均匀性评估,并开发聚合物锂电池组内部电容率检测装置。该装置利用高频交流信号激励ECT传感器,C/V转换电路将电容转换为成正比的电压,经过信号调理后,上位机获得电池组内部电容率分布。实验结果表明测量装置重复测量误差在0.068 63 n F/m以内,电容率的分布呈现对称性,与电池组的内部构造相吻合,装置具有良好的重复性和可靠性。     

锂离子电池用PVDF类隔膜的研究进展

本文综述了锂离子电池的组成、隔膜的作用,介绍了PVDF作为锂电池隔膜的发展,详细介绍了目前国内外的制备方法以及优缺点,并对隔膜未来的发展趋势做了展望.     

纳米颗粒的自组装及其在锂离子电池中的应用EI北大核心CSCD

在简要介绍纳米颗粒的基本物理-化学性能及其制备现状的基础上,着重论述了纳米颗粒自组装的类型及原理,总结了纳米颗粒自组装在锂离子电池上的应用研究进展,并指出该应用中存在制备效率低、污染较大等问题,提出今后工作将集中在开发合适组装单元、揭示自组装基本原理、简化制备程序等方面,认为纳米材料合成过程中实现多层次/功能电池结构调控是未来发展的重要方向之一。     

STEM characterization for lithium-ion battery cathode materials

This article briefly reviews the status and new progress on the characterization of popular cathode materials for lithium-ion batteries by scanning transmission electron microscopy (STEM) and presents some of our own research work in this field, especially the direct observation of light elements such as Li and H with atomic resolution using the annular bright-field imaging (ABF) technique. These results demonstrate that STEM combined with high-angle annular dark-field imaging, electron energy-loss spectroscopy (EELS) and ABF imaging is a powerful tool for investigation of the atomic level microstructure of various cathode materials and resolving many fundamental issues in the battery related research field and industries, such as the mechanism of capacity fading and diffusion behavior across the interface between electrode and electrolyte.     

电池更换模式下电池管理系统的研究

针对奥运会纯电动公交车更换电池的运行模式,提出了一种主从式结构的电池管理系统。此系统除了能在车载模式下实现电池状态监测、故障报警和整车通讯之外,还能完成电池分箱拆分后的充电、维护及重组等管理功能,与传统电池管理系统相比更具模块化和通用性特点。重点分析了这种模式下电池管理系统的系统构架、功能特点、状态估算等问题,提出了整车充电与分箱充电控制相结合、电池参数识别与电池重组相配合、电池状态自校正等多种特殊处理方法,较好配合了纯电动公交车的正常运行。     

A silicon-containing nanocomposite for a thin-film lithium-ion battery

A technological basis for manufacturing of a thin-film anode based on a silicon-containing nano-composite for lithium-ion batteries is developed. The results of experimental studies of charge-discharge characteristics, morphology and phase composition for the silicon-containing nanocomposite are presented, confirming the promising character of its application as an anodic material.     

空间用锂离子电池的研究进展

锂离子电池因其优异的质量比能量、体积比能量以及循环寿命比传统的贮能电源表现出更大的优势，在很多领域都得到了广泛的应用。本文详细介绍了国内外锂离子电池在航天领域的应用情况，对国外空间用锂离子电池技术进行了评述，并对今后研究热点和发展趋势进行了展望。     

层状镍基锂离子电池正极材料的改性研究

详细阐述了国内外关于层状LiNiO2正极材料的改性研究进展,并对体相掺杂和表面包覆改性层状LiNiO2正极材料电化学性能提高的机理进行了讨论,最后对层状LiNiO2正极材料今后的发展方向进行了展望。     

Practical considerations of Si-based anodes for lithium-ion battery applications

Using Si-based anodes in Li-ion batteries is one of the most feasible approaches to achieve high energy densities despite their disadvantages, such as low conductivity and massive volume expansion, which cause unstable solid electrolyte interphase layers with mechanical failure. The forefront in research and development to address the above challenges suggests the possibility of fully commercially viable cells using various structural and interfacial modifications. In particular, we present a discussion of each dimension of Si-based anodes in multiple controlled systems, including plain, hollow, porous, and uniquely engineered structures, which are further evaluated based on their anode performances, such as initial reversibility, capacity retention for extended cycles with its efficiency, degree of volume expansion tolerance, and rate capabilities, by several practical standards in half cells. With these practical considerations, multi-dimensional structures with uniform size distributions (micrometers, on average) are strongly desired to satisfy the rigorous requirements for widespread applications. Furthermore, we closely examined several full cells composed of Si-based multicomponent anodes coupled with suitable cathodes based on practical standards to propose future research directions for Si-based anodes to keep pace with the rapidly changing market demands for diverse energy storage systems.

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动力型锂离子电池的研究进展

动力型锂离子电池已成为目前众多学者研究的热点。从活性材料,导电剂以及粘结剂等,简要介绍了动力型锂离子电池的发展及研究现状,并对未来做了展望。     

锂离子电池正极材料磷酸铁锂的研究现状

LiFePO4正极材料具有原料来源广泛、比容量高、工作电压适中、循环性能好和电化学性能稳定等优点,被认为是下一代锂离子电池首选正极材料.介绍了LiFePO4的橄榄石型晶体结构及主要合成工艺,讨论了针对其缺点的改性研究,并对LiFePO4未来发展方向作了展望.     

锂离子电池凝胶聚合物电解质制备工艺进展

凝胶聚合物电解质的应用广泛,在化学电源方面的应用主要集中应用于聚合物锂离子电池。本文介绍了锂离子电池用凝胶聚合物电解质的制备方法、各自的优缺点以及其在电池制备中的应用,重点介绍了UV固化技术在凝胶聚合物电解质制备中的应用,展望了聚合物锂离子电池UV聚合工艺的发展前景。     

锂离子电池正极材料热稳定性研究进展

对常见正极材料的热稳定性进行了综述,通过对正极材料的DSC数据的比较,可见表面包覆可以提高正极材料的热稳定性,原因是包覆材料能有效抑制活性材料和电解液的直接接触,减少热量的产生,提高电池的安全性.     

锂离子电池正极材料层状LiMnO2的研究进展

对近年来圆外层状氧化锰锂正极材料的研究进展进行了综述。详细介绍了正交和单斜同质多晶层状氧化锰锂的晶体结构，合成方法及其电化学特性。开发新的合成方法以及多组分掺杂改性以提高英应用性仍是今后．层状氧化锰锂的研究发展方向。     

Engineering empty space between Si nanoparticles for lithium-ion battery anodes

Silicon is a promising high-capacity anode material for lithium-ion batteries yet attaining long cycle life remains a significant challenge due to pulverization of the silicon and unstable solid-electrolyte interphase (SEI) formation during the electrochemical cycles. Despite significant advances in nanostructured Si electrodes, challenges including short cycle life and scalability hinder its widespread implementation. To address these challenges, we engineered an empty space between Si nanoparticles by encapsulating them in hollow carbon tubes. The synthesis process used low-cost Si nanoparticles and electrospinning methods, both of which can be easily scaled. The empty space around the Si nanoparticles allowed the electrode to successfully overcome these problems Our anode demonstrated a high gravimetric capacity (~1000 mAh/g based on the total mass) and long cycle life (200 cycles with 90% capacity retention).     

Metal oxide nano-particles for improved electrochromic and lithium-ion battery technologies

Hot-wire chemical vapor deposition (HWCVD) has been employed as an economically scalable method for the deposition of crystalline tungsten oxide nano-rods and nano-particles. Under optimal synthesis conditions, only crystalline WO₃ nano-structures with a smallest dimension of ∼10-50 nm are observed with extensive transmission electron microscopy (TEM) analyses. The incorporation of these particles into porous films led to profound advancement in state-of-the-art electrochromic (EC) technologies. HWCVD has also been employed to produce crystalline molybdenum oxide nano-rods, particles and tubes at high density. TEM analyses show that the smallest dimension of these nano-structures is ∼5-30 nm. XRD and Raman analyses reveal that the materials are highly crystalline and consist of Mo, MoO₂ and MoO₃ phases. It is also possible to fabricate large-area porous films containing these MoO_x nano-structures. Furthermore, these films have been tested as the negative electrode in lithium-ion batteries, and a surprisingly high, reversible capacity has been observed.     

高性能锂离子电池正极Calix[6]quinone（英文）

有机醌类化合物因其具有高的理论容量值而引起了人们的广泛关注.本文合成了一种新型的环状大分子Calix[6]quinone(C6Q),它由6个对苯醌单元组成,可提供12个电化学位点,是一种极具发展前景的锂离子正极材料.C6Q在0.1 C的电流密度下展示了高达423 mA h g^-1的初始放电比容量(理论放电比容量为447 mA h g^-1).经过100圈充放电循环之后,它的容量保持在216 mA h g^-1;经过300次循环之后,仍然拥有195 mA h g^-1的高容量.C6Q具有高容量和宽的电化学窗口,因此可以提供高达1201 W h kg^-1的能量密度.此外,使用有序介孔碳CMK-3固载C6Q的方法可以进一步提高C6Q的电化学性能.