材料科学
阳极
钛酸锂
锐钛矿
二氧化钛
石墨
原子层沉积
锂(药物)
钛
涂层
化学工程
电解质
钛酸酯
法拉第效率
薄膜
纳米技术
复合材料
锂离子电池
陶瓷
催化作用
电极
光催化
冶金
有机化学
电池(电)
化学
物理化学
内分泌学
工程类
物理
医学
量子力学
功率(物理)
作者
Yang Jin,Yu Han,Xinhua Liu
出处
期刊:Meeting abstracts
日期:2020-05-01
卷期号:MA2020-01 (52): 2854-2854
标识
DOI:10.1149/ma2020-01522854mtgabs
摘要
In commercial lithium ion batteries, graphite is used as the most common anode material, which are easy to generate lithium dendrites, when operating at a high current rate, causing an internal short circuit and thus suffering from critical safety issues. Titanium-based anode materials are a class of alternative materials to graphite, which has a potential to offer a significant safety advantage over the graphite anode. Lithium titanate oxide (Li 4 Ti 5 O 12 , LTO) and titanium dioxide (TiO 2 ) are two of the most studied titanium-based anodes because of their properties of intrinsic safety and small volume expansion. Recently our group deposited high electronic conductive Al-doped ZnO (AZO) films on the LTO and anatase TiO 2 samples by atomic layer deposition (ALD). The optimum AZO-coated LTO exhibited a superior rate capability and cycling stability at 55 ℃ within a potential rage of 0.1 V to 3.0 V; the optimum AZO-coated TiO 2 delivered a much higher capacity than that of the uncoated TiO 2 even after 500 cycles of discharge/charge at 1 C rate (1 C = 168 mAh g -1 ). The coating of AZO thin films is believed to improve the conductivity of the active materials, protect the active materials from the electrolyte, and suppress the undesirable interfacial reactions between them.
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