Lithium storage in perovskite lithium lanthanum titanate

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• 作者：Chunxiu Hua ; Xiangpeng Fang ; Zhaoxiang Wang ; ^{zxwang@iphy.ac.cn} ; Liquan Chen
• 关键词：Lithium lanthanum titanate ; Lithium storage mechanism ; SEI formation ; Carbon coating
• 刊名：Electrochemistry Communications
• 出版年：2013
• 出版时间：July, 2013
• 年：2013
• 卷：32
• 期：Complete
• 页码：5-8
• 全文大小：700 K

文摘

Perovskite lithium lanthanum titanate (LLTO) was synthesized using sol-gel method. It shows a reversible capacity of 145 mA h g^? 1 and moderate cycling performance between 0.01 and 2.00 V. Cyclic voltammetry and X-ray diffraction results demonstrate a two-step solid-solution reaction behavior in the voltage range of 0.00-3.00 V upon lithium insertion/extraction. A stable solid electrolyte interphase (SEI) layer is formed on the surface of LLTO after the initial discharge. Carbon coating by chemical vapor deposition improves its cycling performance significantly.