Interfacial modification for high-power solid-state lithium batteries
Interfacial modification for high-power solid-state lithium batteries
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DOI：
10.1016/j.ssi.2008.02.017
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发表时间：
2008-09-30
影响因子：
3.2
通讯作者：
Sasaki, Takayoshi
中科院分区：
文献类型：
--
作者：
Takada, Kazunon;Ohta, Narumi;Sasaki, Takayoshi
为了提高固态锂电池的高倍率性能，对LiCoO2与硫化物固体电解质之间的界面进行了改性。氧化物固体电解质Li4Ti5O12、LiNbO3和LiTaO3的薄膜插入在界面处作为缓冲层。热处理后的高倍率性能的变化表明，缓冲层应在低温下形成，以避免元素的热扩散。LiNbO3和LiTaO3的缓冲层可以在低温下形成用于界面改性，因为它们在非晶态下显示出高离子传导性，因此对于高功率密度比Li4Ti5O12更有效。(c)2008 Elsevier BY版权所有。
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. (c) 2008 Elsevier BY All rights reserved.