新型炭材料2023，Vol.38Issue(2)：327-336,10.DOI:10.1016/S1872-5805(21)60059-8
氢氧化钾处理中间相炭微球应用于高倍率钾离子电池负极
KOH-treated mesocarbon microbeads used as high-rate anode materials for potassium-ion batteries
摘要
Abstract
Graphite is one of the most promising anode materials for potassium-ion batteries (PIBs) due to its low cost and stable discharge plateau. However, its poor rate performance still needs to be improved. A novel graphitic anode was designed from com-mercial mesocarbon microbeads (MCMBs) by KOH treatment. Using limited oxidation and slight intercalation, the interlayer spa-cing of graphitic layers on the surface of the MCMBs was increased, causing the K+ diffusion rate to be significantly improved. When this modified material was combined with carboxymethyl cellulose as a binder (79.2％) and used as a PIB anode, it had a high plateau capacity below 0.25 V (271 mAh g?1), superior rate capability (160 mAh g?1 at 1.0 A g?1), excellent cycling stability (about 184 mAh g?1 after 100 cycles at 0.1 A g?1), and a high initial coulombic efficiency. This work provides a simple strategy to prepare graphitic materials with an excellent potassium storage performance.关键词
钾离子电池/负极材料/中间相碳微球/倍率性能/放电平台Key words
Potassium ion battery/Anode material/Mesocarbon microbead/Rate performance/Discharge plateau分类
化学化工引用本文复制引用
肖南,郭红达,肖剑,魏一波,马晓晴,张小宇,邱介山..氢氧化钾处理中间相炭微球应用于高倍率钾离子电池负极[J].新型炭材料,2023,38(2):327-336,10.基金项目
National Natural Science Foundation of China(U2003216) （U2003216）
Fundamental Research Funds for the Central Universities of China (DUT20LAB131).基金项目:国家自然科学基金(U2003216) （DUT20LAB131）
中央高校基本科研业务费专项资金(DUT20LAB131). （DUT20LAB131）
