自组装CaCO3模板法合成锂离子电池负极材料SnO2@voids@C-SnO及改性研究

doi:10.12068/j.issn.1005-3026.2023.03.008

东北大学学报（自然科学版） ›› 2023, Vol. 44 ›› Issue (3): 363-369.DOI: 10.12068/j.issn.1005-3026.2023.03.008

自组装CaCO₃模板法合成锂离子电池负极材料SnO₂@voids@C-SnO及改性研究

郝熙娟^1,2，胡剑南^1,2，赵赫^1,2，李建中^1,2

(1. 东北大学多金属共生矿生态化冶金教育部重点实验室，辽宁沈阳110819； 2. 东北大学冶金学院，辽宁沈阳110819)

修回日期:2022-09-07 接受日期:2022-09-07 发布日期:2023-03-24
通讯作者: -
作者简介:郝熙娟(1996- )，女，辽宁庄河人，东北大学硕士研究生；李建中(1976- )，男，辽宁沈阳人，东北大学教授，博士生导师.
基金资助:
国家重点研发计划项目(2019YFE0123900)；国家自然科学基金资助项目(51974069)；中央高校基本科研业务费专项资金资助项目(N2125035).

Study on Synthesis and Modification of SnO₂@voids@C-SnO as Anode Material for Lithium-Ion Battery by Self-assembled CaCO₃ Template Method

HAO Xi-juan^1,2， HU Jian-nan^1,2， ZHAO He^1,2， LI Jian-zhong^1,2

1. Key Laboratory for Ecological Metallurgy of Multimetallic Ores， Ministry of Education， Northeastern University， Shenyang 110819， China； 2. School of Metallurgy， Northeastern University， Shenyang 110819， China.

Revised:2022-09-07 Accepted:2022-09-07 Published:2023-03-24
Contact: LI Jian-zhong
About author:-
Supported by:
-

摘要/Abstract

摘要： 基于CaCO₃模板法制备出具有三维分级多孔碳骨架结构SnO₂@voids@C-SnO材料，并通过溶胶凝胶法进行Ni的添加.利用XRD和SEM对所得产物的晶体结构和微观形貌进行表征，并对电池进行电化学性能测试.结果表明，SnO₂@voids@C-SnO材料在电流密度50mA·g^-1时首次放电比容量为1092mAh·g^-1.添加Ni可以有效增加负极材料的比容量.当Ni质量分数达到25%时，材料的首次放电比容量达到1414.6mAh·g^-1，70次循环后的放电比容量仍能保持617mAh·g^-1，倍率性能优良.这主要是因为Ni的添加在一定程度上避免了纳米粒子的团聚，缓解了体积膨胀带来的影响，明显改善了负极材料的电化学性能.

关键词: SnO₂；负极材料；多孔；溶胶凝胶法；模板法

Abstract: A SnO₂@voids@C-SnO material with three-dimensional hierarchical-porous carbon skeleton structure was prepared by using CaCO₃ as template. Then， Ni element was doped in the SnO₂@voids@C-SnO material by a sol-gel method. The crystal structure and morphology of the prepared sample were characterized by XRD and SEM， respectively， and the electrochemical performance of the above sample-based battery was tested. The results show that the first discharge specific capacity of the SnO₂@voids@C-SnO material at 50mA· g^-1 was 1092mAh· g^-1. The specific capacity of the SnO₂@voids@C-SnO material can be effectively increased by Ni doping. A 25% Ni-doped material obtained the highest first discharge specific capacity of 1414.6mAh· g^-1， and still had a higher discharge specific capacity of 617mAh· g^-1 after 70 cycles， the sample also showed high-rate performance. The increased particle dispersion after Ni doping was conducive to decreasing volume expansion， thus， endowing the Ni-doped SnO₂@voids@C-SnO material with high electrochemical properties.

Key words: SnO₂; anode material; porous; sol-gel method; template method

中图分类号:

TM912

郝熙娟，胡剑南，赵赫，李建中. 自组装CaCO₃模板法合成锂离子电池负极材料SnO₂@voids@C-SnO及改性研究[J]. 东北大学学报（自然科学版）, 2023, 44(3): 363-369.

HAO Xi-juan， HU Jian-nan， ZHAO He， LI Jian-zhong. Study on Synthesis and Modification of SnO₂@voids@C-SnO as Anode Material for Lithium-Ion Battery by Self-assembled CaCO₃ Template Method[J]. Journal of Northeastern University(Natural Science), 2023, 44(3): 363-369.

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自组装CaCO₃模板法合成锂离子电池负极材料SnO₂@voids@C-SnO及改性研究

Study on Synthesis and Modification of SnO₂@voids@C-SnO as Anode Material for Lithium-Ion Battery by Self-assembled CaCO₃ Template Method

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