期刊
JOURNAL OF POWER SOURCES
卷 307, 期 -, 页码 724-730出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.01.039
关键词
LiNi0.8Co0.15Al0.05O2 cathode; Post-annealing; Surface defects; Li10GeP2S12 solid electrolyte; All-solid-state lithium batteries
资金
- National High Technology Research and Development Program of China, (863 Program) [2013AA050906]
- National Natural Science Foundation of China [51172250, 51202265]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09010201]
- Key Scientific and Technological Innovation Team Project of Zhejiang province [2013PT16]
An insightful study on the fundamental lithium storage behavior of all-solid-state lithium battery with a structure of LiNi0.8Co0.15Al0.05O2 (NCA)/Li10GeP2S12/Li-In is carried out in this work. The relationship between electrochemical performances and particle size, surface impurities and defects of the NCA positive material is systematically investigated. It is found that a ball-milling technique can decrease the particle size and remove surface impurities of the NCA cathode while also give rise to surface defects which could be recovered by a post-annealing process. The results indicate that the interfacial resistance between the NCA and Li10GeP2S12 is obviously decreased during the ball-milling followed by a post-annealing. Consequently, the discharge capacity of NCA in the NCA/Li10GeP2S12/Li-In solid-state battery is significantly enhanced, which exhibits a discharge capacity of 146 mAh g(-1) at 25 degrees C. (C) 2016 Elsevier B.V. All rights reserved.
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