新型炭材料2022，Vol.37Issue(5)：1000-1010,11.DOI:10.1016/S1872-5805(22)60632-2
表面氧化和插层改性硬碳负极锂离子电容器
A high-rate and ultrastable anode for lithium ion capacitors produced by modifying hard carbon with both surface oxidation and intercalation
摘要
Abstract
Due to the difference of energy storage mechanisms between the anode and cathode materials, the power density or rate performance of a lithium-ion capacitor is greatly limited by its anode material. Hard carbon is a promising anode material for lithium ion capacitors, and its modification is an important way to improve the electrochemical performance of lithium-ion capacit-ors. A commercial hard carbon from Kuraray Inc was modified by oxidation followed by intercalation with ZnCl2 (ZnCl2―OHC). The reversible capacity of a half-cell prepared using this material was 257.4 mAh·g?1 at 0.05 A·g?1, which is obviously higher than the unmodified one (172.5 mAh·g?1). The capacity retention of a full cell prepared using ZnCl2―OHC as the anode and activated carbon as the cathode reached 43.3％ when the current density increased from 0.1 to 10 A·g?1, which is more than twice that of the untreated hard carbon. After 5000 charge-discharge cycles at 1 A·g?1, the capacity retention of the full cell was about 98.4％. The modification of hard carbon by surface oxidation and intercalation is therefore a promising way to improve its anode performance for lithium ion capacitors.关键词
锂离子电容器/负极材料/硬炭/插层Key words
Lithium ion capacitors/Anode materials/Hard carbon/Intercalation分类
通用工业技术引用本文复制引用
张璐瑶,王赫,秦楠,郑俊生,赵基钢..表面氧化和插层改性硬碳负极锂离子电容器[J].新型炭材料,2022,37(5):1000-1010,11.基金项目
国家自然科学基金(51777140) （51777140）
科技部科技支撑计划项目(2015BAG06B00) （2015BAG06B00）
同济大学中央高校基本科研基金(22120180519).The authors acknowledge the financial support from the National Natural Science Foundation of China(51777140),Science and Technology Support Project of Ministry of Science and Technology(2015BAG06B00),and Fundamental Research Funds for the Central Universities at Tongji University(22120180519). （22120180519）
