竹基生物质硬碳的制备与储钠性能研究  

Preparation of bamboo-based biomass hard carbon and study on its sodium storage property

作　　者：邹飞杨 吉闫 左宇程 张京涛 葛志清 陈召勇 ZOU Fei-yang;JI Yan;ZUO Yu-cheng;ZHANG Jing-tao;GE Zhi-qing;CHEN Zhao-yong(School of Materials Science and Engineering,Changsha University of Science&Technology,Changsha 410114,China;New Energy Power Battery Institute,Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学材料科学与工程学院,湖南长沙410114 [2]长沙理工大学新能源动力电池研究所,湖南长沙410114

出　　处：《现代化工》2024年第11期98-103,共6页Modern Chemical Industry

基　　金：国家自然科学基金面上项目(51874048);国家自然科学基金青年项目(21905278)。

摘　　要：通过调整竹基生物质硬碳粒径提高电解液的渗透,高温煅烧增加其封闭微孔数量,改善竹基生物质硬碳低电压平台储钠容量和钠离子迁移动力学。结果表明,平均粒径为19μm的竹基生物质硬碳在30 mA/g电流密度下的可逆储钠比容量为374.37 mAh/g,首次库伦效率为76.88%,100次循环后可逆储钠比容量为326.9 mAh/g,在300 mA/g电流密度下容量保持率为91.5%。该研究为精确调节生物质衍生硬碳的微观结构以获得优异的钠离子存储性能提供了一种新的策略。The permeability of electrolyte is improved by adjusting the particle size of bamboo-based biomass hard carbon,and the number of closed micropores in hard carbon is increased by calcination at high temperature.Therefore,the sodium storage capacity and sodium ion migration kinetics of bamboo-based biomass hard carbon are improved.Results show that the reversible sodium storage capacity of bamboo-based biomass hard carbon with an average particle size of 19μm is 374.37 mAh·g-1 at 30 mA·g-1 of current density,the first coulomb efficiency is 76.85%,the reversible sodium storage capacity is 333.1 mAh·g-1 after 100 cycles,and the capacity retention rate is 91.5%at 300 mA·g-1 of current density.This study provides a new strategy for precisely regulating the microstructure of biomass-derived hard carbon to obtain excellent sodium ion storage performance.

关 键 词：硬碳 生物质 竹炭 钠离子电池 

分 类 号：TQ152[化学工程—电化学工业]