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首页> 外文会议>NATO Advanced Study Institute on New Trends in Intercalation Compounds for Energy Storage, Sep 22-Oct 2, 2001, Sozopol, Bulgaria >LIMITATION OF CATHODE ELECTROLYTE REACTION IN LITHIUM ION BATTERIES
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LIMITATION OF CATHODE ELECTROLYTE REACTION IN LITHIUM ION BATTERIES

机译：锂离子电池中阴极电解质反应的局限性

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摘要

One of the main drawbacks of the lithiated oxides such as LiNi_(0.8)Co_(0.2)O_2 is the strong interaction between the electrode and the electrolyte which can lead to exothermic reactions upon cycling and thus presents a major risk of thermal hazard in a lithium ion battery. To prevent this exothermic reaction, we have tried to protect the surface of the LiNi_(0.8)Co_(0.2)O_2 particles by a thin layer of Li_(3x)La_(2/3-x)[]_(1/3.2x)TiO_3 which is a good Li-ion conductor. The aim was to enable the lithium to intercalate into the cathode material through the coating layer and to prevent the surface of the cathode to be directly in contact with the electrolyte. The treatment has been performed by sol-gel method. Precursors of lithium, lanthanum and titanium have been dissolved in propylene glycol, 2-propanol or ethanol in appropriate amounts. The cathode powder has been dispersed in the solution and stirred. After evaporating the solvent, the powder was heated at 800℃ for 24 h.
机译：锂化氧化物（例如LiNi_（0.8）Co_（0.2）O_2）的主要缺点之一是电极与电解质之间的强相互作用，这可能导致循环时发生放热反应，因此对锂构成热危害的主要风险离子电池。为了防止这种放热反应，我们尝试通过薄薄的Li_（3x）La_（2 / 3-x）[] _（1 / 3.2x）保护LiNi_（0.8）Co_（0.2）O_2颗粒的表面TiO_3是一种很好的锂离子导体。目的是使锂能够通过涂层插入到阴极材料中，并防止阴极的表面直接与电解质接触。该处理已经通过溶胶-凝胶法进行。将锂，镧和钛的前体以适当的量溶解在丙二醇，2-丙醇或乙醇中。将阴极粉末分散在溶液中并搅拌。蒸发溶剂后，将粉末在800℃下加热24小时。

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