Insights on the fundamental lithium storage behavior of all-solid-state lithium batteries containing the LiNi0.8Co0.15Al0.05O2 cathode and sulfide electrolyte

分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-05-02

Peng, G [Peng, Gang][ 1,2 ] Yao, XY [Yao, Xiayin][ 1 ] Wan, HL [Wan, Hongli][ 1 ] Huang, BX [Huang, Bingxin][ 1 ] Yin, JY [Yin, Jingyun][ 1 ] Ding, F [Ding, Fei][ 2 ] Xu, XX [Xu, Xiaoxiong][ 1 ]

摘要： 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 C.

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