化工进展 ›› 2019, Vol. 38 ›› Issue (10): 4693-4704.DOI: 10.16085/j.issn.1000-6613.2019-0079

• 精细化工 • 上一篇    下一篇

高性能钠离子电池黏合剂的研究进展

朱子翼(),黎永泰,董鹏,曾晓苑,许斌,郝涛,李雪(),张英杰()   

  1. 昆明理工大学冶金与能源工程学院,锂离子电池及材料制备技术国家地方联合工程实验室,云南省先进电池材料重点实验室,云南 昆明 650093
  • 收稿日期:2019-01-11 出版日期:2019-10-05 发布日期:2019-10-05
  • 通讯作者: 李雪,张英杰
  • 作者简介:朱子翼(1991—),男,硕士,研究方向为先进二次电池及相关能源材料。E-mail:471096347@qq.com
  • 基金资助:
    国家自然科学基金(51604132);云南省应用基础研究计划(2017FB085)

Research progress of binder for high performance sodium-ion battery

Ziyi ZHU(),Yongtai LI,Peng DONG,Xiaoyuan ZENG,Bin XU,Tao HAO,Xue LI(),Yingjie ZHANG()   

  1. National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
  • Received:2019-01-11 Online:2019-10-05 Published:2019-10-05
  • Contact: Xue LI,Yingjie ZHANG

摘要:

为了实现钠离子电池优异的电化学性能,除了从电极材料的搭配方面入手,作为维持电极结构稳定性的关键材料,黏合剂的选择也至关重要。本文对黏合剂的主要作用与性能要求进行了讨论,系统综述了近年来高性能钠离子电池黏合剂的研究进展,分别阐述了聚偏氟乙烯、羧甲基纤维素、海藻酸钠、聚丙烯酸以及交联聚合物等5类黏合剂的特性:聚偏氟乙烯的化学稳定性良好,黏合效果较好,但存在溶胀率较大的问题;羧甲基纤维素具有良好的分散性,机械强度较大,由于脆性较大而需与丁苯橡胶搭配使用;海藻酸钠环保且廉价,保形性好,但稳定性较差;聚丙烯酸拥有较高的弹性模量和抗拉强度,但是力学性能较差;交联聚合物的机械强度大,弹性较好,可能存在网络缺陷。结合已有的研究报道,探讨了这些黏合剂在钠离子电池系统中的应用,展望了今后黏合剂在拓宽来源领域、匹配适合的电极材料以及消除水性黏合剂对电池性能的负面影响等方面的发展方向。

关键词: 黏合剂, 聚偏氟乙烯, 羧甲基纤维素, 海藻酸钠, 聚丙烯酸, 交联聚合物

Abstract:

In order to achieve the excellent electrochemical performance of sodium-ion battery, apart from the improvement on the combination of electrode materials, as a key material to maintain the stability of the electrode structure, the choice of binder is also crucial. In this paper, the main effects and performance requirements of binder are discussed. The research progress of binder for the high performance sodium-ion battery in recent years is systematically reviewed. The properties of five kinds of binder, such as polyvinylidene fluoride, carboxymethyl cellulose, sodium alginate, polyacrylic acid, crosslinked polymer, are described respectively: polyvinylidene fluoride has good chemical stability and adhesion, but has a problem of large swelling ratio; carboxymethyl cellulose has good dispersibility and mechanical strength, because of the large brittleness, it needs to be used together with polymerized styrene butadiene rubber; sodium alginate is environmentally friendly and cheap, with good shape retention, but poor stability; polyacrylic acid has high elasticity modulus and tensile strength, but poor mechanical properties; the mechanical strength and elasticity of crosslinked polymer are high, and there may be network defects. Combined with the existing research reports, the application of these binders in sodium-ion battery system is discussed. It is expected that the binder will broaden the source field, match the suitable electrode materials and eliminate the negative impact of the water-based binder on battery performance.

Key words: binder, polyvinylidene fluoride, carboxymethyl cellulose, sodium alginate, polyacrylic acid, crosslinked polymer

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