Application for Simply Recovered LiCoO2 Material as a High-Performance Candidate for Supercapacitor in Aqueous System

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• 作者：Yanan Xu ; Yanying Dong ; Xiao Han ; Xiaofeng Wang ; Yijing Wang ; Lifang Jiao ; Huatang Yuan
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2015
• 出版时间：October 5, 2015
• 年：2015
• 卷：3
• 期：10
• 页码：2435-2442
• 全文大小：480K
• ISSN：2168-0485

文摘

A new recycling way for simply recovered LiCoO₂ materials from spent Li-ion batteries (LIBs) is proposed to serve as a high-performance supercapacitor material in aqueous systems for the first time. A solvent method, using inexpensive DMF to recover the waste LiCoO₂ scraps, is suitable for industrial large-scale application with the prominent characteristics of low cost and simple technique. The recovered LiCoO₂ sample displays the maximum capacitances of 654 F g^鈥? with a capacity retention rate of 86.9% after 4000 cycles at 2 A g^鈥?. Excellent electrochemical capacitive behaviors demonstrate that the recovered LiCoO₂ material is a promising candidate for pseudocapacitors, which could overcome not only the serious resource waste and environment contamination of LiCoO₂ materials in spent LIBs but also the high-cost restriction of supercapacitor practical applications. So, it is hopeful for the recovered LiCoO₂ material to be used in supercapacitors, which has advantages of high power density, cost-effective, environment friendly and safe.