Studies on New Materials for Battery Application by Micro-electrode Techniques

利用微电极技术研究电池应用新材料

基本信息

批准号：
06453111
负责人：
UCHIDA Isamu
金额：
$ 4.67万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06453111/
关键词：
Lithium secondary battery Lithium ion battery Battery active materials Intercalation Lithium deposition Metal hydride Micro-electrode Micro-array electrode In situ methode リチウム2次電池

项目摘要

1) Development of a new technique, micro-voltammetry targeting a single particle of redox materials in aqueous and non-aqueous systems-An experimental set-up to enable us to measure voltammograms for a single solid particle has been constructed. By using micro-manipulation techniques, the tip of a filament acting as a current lead wase contacted with a target of solid particle spread on a separator sheet soaked with an electrolyte under a microscope. Small particle experiments were carried out for metal hydrides in alkali solutions and for Li-containing layred oxides in organic solutions, and demonstrated that single particles having 10 micrometer sized were successfully made into the working electrode.2) Using the above technique, we carried out microvoltammetric studies on LaNi_5, Cl5 type Laves phase alloys and AB_5 alloys, and determined the chemical diffusion coefficients of hydrogen. This studies have been extended to LiSB materials, the layred oxides such as LiCoO_2 and LiMn_2O_4, in propylene carbonate solutions, and kinetic studies of Li-ion intercalation/deintercalation are now under investigation.3) Kinetic studies on lithium deposition/dissolution and alloy formation processes on various substrates in organic solutions were carried out by micro-disk electrodes, and kinetic parameters such as the exchange current density and diffusion coefficient have been determined as functions of temperature and solvent compositions.4) Micro-array electrodes have been applied to measure the conductivity change during Li-ion intercalation/deintercalation of LiSB cathodes. It was demonstrated that this in situ conductivity measurement with a bi-potentiostat is particularly useful in measuring both current-potential and conductivity-potential relationships simultaneously.

1）开发一种新技术，靶向水性和非水系统中的氧化还原材料粒子的微静电疗法 - 一种实验设置，使我们能够测量单个固体粒子的伏安图。通过使用微型操纵技术，丝的尖端充当当前的铅含量，与固体颗粒的靶标接触到在显微镜下用电解质浸泡的分离板上的固体靶标。在碱溶液中对金属氢化物进行了小粒子实验，并在有机溶液中进行了含Li的氧化氧化物，并证明了使用上述技术成功地将具有10微米尺寸的单个颗粒成功地制成，我们使用上述技术进行了lani_5，cl5型lani_5，cl5型laves apep phass阶段合金和AB _5差异和AB _5差异的化合物，并确定了液压差异。这项研究已扩展到LISB材料，碳酸盐溶液中的氧化氧化物，例如LICOO_2和LIMN_2O_4，以及对锂离子互生/去干扰化的动力学研究。已经确定了诸如交换电流密度和扩散系数之类的参数，该参数已被确定为温度和溶剂组成的功能。4）微阵列电极已应用于测量LISB阴极的液管插入/去除液中的电导率变化。已经证明，使用Bi-Potentiostat的原位电导率测量在同时测量电流电位和电导率电位关系方面特别有用。