NIMTE OpenIR  > 2018专题
New perspective to understand the effect of electrochemical prelithiation behaviors on silicon monoxide
Shen, Chengxu; Fu, Rusheng; Xia, Yonggao; Liu, Zhaoping
2018
发表期刊RSC ADVANCES
卷号8期号:26页码:14473-14478
摘要Electrochemical prelithiation is a facile, effective and extensively used method to improve the initial coulombic efficiency of SiO. However, much less research attention has been devoted to prelithiation effect on initial several cycles. Here, we introduce a new perspective to evaluate the prelithiation behaviors, which could understand in depth the electrochemical prelithiation behaviors and their effects on the following two cycles. Then X-ray photoelectron spectroscopy was further performed to pinpoint the reaction products. It has been found that the quantity of irreversible Li4SiO4, Li2O and SEI (Li2CO3 and LiF) and reversible LixSi are increasing as the prelithiation time extending. When the prelithiation time extending over 20 min, only alloy reaction of Si has been revealed. The regeneration of SEI discloses at least 7% capacity loss in the first cycle which depends on the prelithiated time. However, the reformation of SEI in the second cycles reveals 3% capacity loss. Because the coulombic efficiencies are independent on prelithiated time in the second cycle which indicates only one discharge/charge cycle is enough to form integrated SEI and adequate irreversible Li4SiO4 and Li2O except part of unreactive SiOx.
关键词Lithium-ion Batteries Ray Photoelectron-spectroscopy Anodes Performance Nanoparticles Electrolyte Cells
学科领域Chemistry
语种英语
文献类型期刊论文
条目标识符http://ir.nimte.ac.cn/handle/174433/16910
专题2018专题
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GB/T 7714
Shen, Chengxu,Fu, Rusheng,Xia, Yonggao,et al. New perspective to understand the effect of electrochemical prelithiation behaviors on silicon monoxide[J]. RSC ADVANCES,2018,8(26):14473-14478.
APA Shen, Chengxu,Fu, Rusheng,Xia, Yonggao,&Liu, Zhaoping.(2018).New perspective to understand the effect of electrochemical prelithiation behaviors on silicon monoxide.RSC ADVANCES,8(26),14473-14478.
MLA Shen, Chengxu,et al."New perspective to understand the effect of electrochemical prelithiation behaviors on silicon monoxide".RSC ADVANCES 8.26(2018):14473-14478.
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