赝电容特性的三维SnS2/碳复合材料的制备及其储锂性能

doi:10.19799/j.cnki.2095-4239.2020.0118

储能科学与技术 ›› 2020, Vol. 9 ›› Issue (5): 1467-1471.doi: 10.19799/j.cnki.2095-4239.2020.0118

赝电容特性的三维SnS₂/碳复合材料的制备及其储锂性能

马新刚¹(), 臧玉魏¹, 谢连科¹, 尹建光¹, 张国英¹, 马荣春², 袁宪正²()

^1.国网山东省电力公司电力科学研究院，山东济南 250002
^2.山东大学环境科学与工程学院，山东青岛 266237

收稿日期:2020-03-25 修回日期:2020-05-19 出版日期:2020-09-05 发布日期:2020-09-08
通讯作者: 袁宪正 E-mail:qzmxg@sina.com;xzyuan@sdu.edu.cn
作者简介:马新刚（1982—），男，硕士，高级工程师，从事环保与职业卫生技术监督与服务工作，E-mail:qzmxg@sina.com；

Engineering pseudocapacitive lithium storage based on ultra-fine SnS₂-carbon3D microstructure

Xingang MA¹(), Yuwei ZANG¹, Lianke XIE¹, Jianguang YIN¹, Guoying ZHANG¹, Rongchun MA², Xianzheng YUAN²()

^1.State Grid Shandong Electric Power Research Institute, Ji‘nan 250002, Shandong, China
^2.School of Environmental Science and Engineering, Shandong University, Qingdao 266237, Shandong, China

Received:2020-03-25 Revised:2020-05-19 Online:2020-09-05 Published:2020-09-08
Contact: Xianzheng YUAN E-mail:qzmxg@sina.com;xzyuan@sdu.edu.cn

摘要/Abstract

摘要：

通过将电极材料纳米化并与导电材料复合被证实有助于提升合金转化型材料的储锂性能。通过在氮和磷掺杂的三维碳骨架材料表面引入碳包覆的SnS₂超细纳米颗粒获得了具有赝电容特性的电极材料，将其应用于锂离子电池时，展现了优异的倍率特性和循环稳定性。通过循环伏安对材料的储锂机理进行了分析，其中三维网络结构有利于离子和电子的快速传输，并且能够提供更多的活性位点从而提升材料的比容量；同时超细的SnS₂纳米颗粒可以有效缓解充放电过程中的体积膨胀，保证电极材料的结构稳定性。

关键词: 锂离子电池, 负极, 高性能, 赝电容

Abstract:

A nanostructured coating with conductive carbon is an effective way to improve the electrochemical performance of conversion-type materials. In this study, a three-dimensional porous sandwich-type structure constructed using interconnected two-dimensional N,P-co-doped carbon sheets with a composite of SnS₂ nanoparticles embedded in a carbon matrix is proposed. The resulting unique porous structure with large specific surface and structural stability is capable of facilitating ion/electron transportation and providing more active sites to adsorb more Na⁺, while the ultra-fine SnS₂ nanoparticles can accommodate the stress change accompanying the volume expansion and contribute to reducing the Na⁺ diffusion length. The composite electrode demonstrates superior stability, as well as an excellent rate capability. A kinetic analysis demonstrates enhanced surface pseudocapacitive behavior benefiting from the structural design and ultra-fine nanoparticles, which are the two main factors leading to its outstanding performance.

Key words: lithium ion batteries, anode, high performance, pseudocapacitive

中图分类号:

TQ 028.8

马新刚, 臧玉魏, 谢连科, 尹建光, 张国英, 马荣春, 袁宪正. 赝电容特性的三维SnS₂/碳复合材料的制备及其储锂性能[J]. 储能科学与技术, 2020, 9(5): 1467-1471.

Xingang MA, Yuwei ZANG, Lianke XIE, Jianguang YIN, Guoying ZHANG, Rongchun MA, Xianzheng YUAN. Engineering pseudocapacitive lithium storage based on ultra-fine SnS₂-carbon3D microstructure[J]. Energy Storage Science and Technology, 2020, 9(5): 1467-1471.

图/表 3

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赝电容特性的三维SnS₂/碳复合材料的制备及其储锂性能

Engineering pseudocapacitive lithium storage based on ultra-fine SnS₂-carbon3D microstructure

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