Interfacial modification for high-power solid-state lithium batteries

摘要：

Interfaces between LiCoO2 and sulfide solid electrolytes were modified in order to enhance the high-rate capability of solid-state lithium batteries. Thin films of oxide solid electrolytes, Li4Ti5O12, LiNbO3, and LiTaO3, were interposed at the interfaces as buffer layers. Changes in the high-rate performance upon heat treatment revealed that the buffer layer should be formed at low temperature to avoid thermal diffusion of the elements. Buffer layers of LiNbO3 and LiTaO3 can be formed at low temperature for the interfacial modification, because they show high ionic conduction in their amorphous states, and so are more effective than Li4Ti5O12 for high-power densities.

关键词： Solid electrolyte Lithium battery Nanoionics Space-charge layer LiTaO3

作者: Kazunori Takada Narumi Ohta Lianqi Zhang Katsutoshi Fukuda Isao Sakaguchi Renzhi Ma Minoru Osada Takayoshi Sasaki

作者单位: National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki 305-0044, Japan, CREST, Japan Science and Technology Agency, Japan

会议类型: 国际会议

会议名称: The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)

会议地点: 上海

会议语种:英文

页码: 1333-1337

在线出版日期: 2007-07-01（万方平台首次上网日期，不代表论文的发表时间）