电池2024,Vol.54Issue(5) :617-621.DOI:10.19535/j.1001-1579.2024.05.003

空心硬碳球低温下的储锂机制及性能

Lithium storage mechanism and performance of hollow hard carbon spheres at low temperature

郭建强 龚展鹏 任家旺 张平 牛卓越 方志斌
电池2024,Vol.54Issue(5) :617-621.DOI:10.19535/j.1001-1579.2024.05.003

空心硬碳球低温下的储锂机制及性能

Lithium storage mechanism and performance of hollow hard carbon spheres at low temperature

郭建强 1龚展鹏 1任家旺 1张平 1牛卓越 1方志斌1
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作者信息

  • 1. 太原工业学院材料工程系,山西 太原 030000
  • 折叠

摘要

硬碳是一种高性能锂离子电池负极材料.以间苯二酚和甲醛溶液为原料合成前驱体,制备 3 种不同烧结温度(700℃、800℃和 900℃)下的空心硬碳球(HCS-700、HCS-800 和HCS-900),并对 3 种材料进行结构分析及低温储锂性能测试.3种硬碳材料中,HCS-800 具有较大的比表面积及合适的孔径.在-20℃下,以0.2 A/g电流在0~3 V循环,HCS-800 负极的首次放电比容量为 104 mAh/g,第 100 次循环时为 93 mAh/g,均高于HCS-700 和HCS-900 负极.循环伏安测试结果表明:在-20℃下,HCS-800 负极的赝电容机制储锂占比为 78.13%,在 3 种硬碳负极中最高.

Abstract

Hard carbon is a high-performance anode material for Li-ion battery.Precursors are synthesized using resorcinol and formaldehyde solutions as raw materials.Three kinds of hollow hard carbon spheres material(HCS-700,HCS-800 and HCS-900)are prepared at different sintering temperatures(700℃,800℃and 900℃).Structure analysis and low temperature lithium storage performance tests are conducted for these materials.Among the three kinds of hard carbon material,HCS-800 has larger specific surface area and appropriate pore size.The initial specific discharge capacity of HCS-800 anode is 104 mAh/g at-20℃and a current of 0.2 A/g in 0-3 V,and it is 93 mAh/g at the 100th cycle,which are higher than those of HCS-700 and HCS-900 anodes.The cyclic voltammetry test results show that the pseudocapacitive lithium storage contribution of HCS-800 anodes at-20℃is 78.13%,which is the highest among the three kinds of hard carbon anode.

关键词

硬碳/赝电容机制/低温/锂离子电池/电化学性能

Key words

hard carbon/pseudocapacitive mechanism/low temperature/Li-ion battery/electrochemical performance

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基金项目

太原工业学院博士(后)科研资助项目(2023KJ046)

太原工业学院来晋工作优秀博士(后)科研资助项目(2023LJ015)

出版年

2024
电池
全国电池工业信息中心 湖南轻工研究院

电池

CSTPCD北大核心
影响因子:0.336
ISSN:1001-1579
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