广州化学2024，Vol.49Issue(4)：36-41,6.DOI:10.16560/j.cnki.gzhx.20240405
菠萝蜜核衍生硬碳的制备与储钠机理
Preparation of Hard Carbon Derived from Jackfruit Seeds and Its Mechanism of Sodium Storage
摘要
Abstract
Biomass-derived hard carbon owning to the low synthesis cost has attracted wide attention for anode materials of sodium-ion batteries.Herein we propose a high specific capacity hard carbon by the one-step carbonization method using the jackfruit kernels with low-cost as precursors under different sintering temperatures and conduct in-depth research on the correlation electrochemical performance.The results show that the hard carbon carbonized at 1300℃delivers a high reversible specific capacity of 334 mAh/g at a current density of 25 mA/g with a Coulombic efficiency of 71.4%and keeps a specific capacity of 303.8 mAh/g with a capacity retention of 90.2%at the same current density after 100 cycles.The mechanism of sodium storage is investigated by galvanostatic intermittent titration technique(GITT)and non-situ XRD.The results show that the mechanism of sodium storage satisfies the adsorption-intercalation model.Such hard carbon with promising electrochemical properties provides the chance to develop inexpensive sodium anode materials.关键词
钠离子电池/负极材料/生物质/硬碳/电化学测试Key words
sodium-ion battery/anode material/biomass/hard carbon/electrochemical testing分类
信息技术与安全科学引用本文复制引用
王磊,杨程,高彦峰,刘宇..菠萝蜜核衍生硬碳的制备与储钠机理[J].广州化学,2024,49(4):36-41,6.基金项目
国家自然科学基金(No.52202121) （No.52202121）
内蒙古科技计划(No.2021ZD0033) （No.2021ZD0033）
中国三峡集团项目(No.WWKY-2021-0027) （No.WWKY-2021-0027）
