新型炭材料2022，Vol.37Issue(6)：1125-1134,10.DOI:10.1016/S1872-5805(21)60069-0
椰壳基硬炭作为钾离子电池负极材料的结构及其电化学性能
Microstructures and electrochemical properties of coconut shell-based hard carbons as anode materials for potassium ion batteries
摘要
Abstract
Hard carbons have recently attracted wide interest as anode materials for potassium ion batteries(PIBs)because of their high reversible capacity.But,their high preparation cost and poor cycling stability prevent their practical use.Coconut shell-de-rived hard carbons(CSHCs)were prepared from waste biomass coconut shell using a one-step carbonization method,and were used as anode materials for potassium ion batteries.The effects of the carbonization temperature on the microstructures and electrochemic-al properties of the CSHCs were investigated by X-ray diffraction,nitrogen adsorption,Raman spectroscopy,scanning electron mi-croscopy,transmission electron microscopy,and cyclic voltammetry,etc.Results indicate that the CSHC carbonized at 1 000℃(CSHC-10)has a suitable graphite microcrystal size,pore structure and surface defect content,and has the best electrochemical per-formance.Specifically,it has a high reversible specific capacity of 254 mAh·g-1 at 30 mA·g-1 with an initial Coulombic efficiency of 75.0％,and the capacity retention rates are 87.5％after 100 cycles and 75.9％after 400 cycles at 100 mA·g-1,demonstrating its excel-lent potassium storage performance.关键词
钾离子电池/椰壳基硬炭/炭化温度/微观结构/电化学性能Key words
Potassium ion battery/Coconut shell-based hard carbon/Carbonization temperature/Microstructure/Electrochemical performance分类
化学化工引用本文复制引用
黄滔,彭大春,陈醉,夏笑虹,陈玉喜,刘洪波..椰壳基硬炭作为钾离子电池负极材料的结构及其电化学性能[J].新型炭材料,2022,37(6):1125-1134,10.基金项目
National Natural Science Foundation of China(51772083,51402101) （51772083,51402101）
Science and Technology Plan-ning Project of Hunan Province(2018GK1030). 基金项目:国家自然科学基金(51772083,51402101) （2018GK1030）
湖南省科技重大专项项目(2018GK1030). （2018GK1030）
