Performance of Water-soluble Binder Based on Carboxymethyl Cellulose Sodium in Silicon Electrode of Lithium-ion Battery

SUN Xing-shen; LIN Xiang-yu; ZHAO Sheng-yun; FAN Rong-yu; YANG Zi-tao; LIU He; SONG Zhan-qian

doi:10.14028/j.cnki.1003-3726.2025.24.354

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Performance of Water-soluble Binder Based on Carboxymethyl Cellulose Sodium in Silicon Electrode of Lithium-ion Battery

更新时间：2025-03-28

- Performance of Water-soluble Binder Based on Carboxymethyl Cellulose Sodium in Silicon Electrode of Lithium-ion Battery
- Polymer Bulletin Vol. 38, Issue 4, Pages: 676-688(2025)
- 作者机构：
  
  1.中国林业科学研究院林产化学工业研究所，生物质化学利用国家工程实验室，国家林业和草原局林产化学工程重点实验室，江苏省生物质能源与材料重点实验室，南京 210042
  2.武夷学院，福建省生态产业绿色技术重点实验室，绿色化工技术福建省高等学校重点实验室，武夷山 354300
  3.南京林业大学，江苏省林业资源高效加工利用协同创新中心，南京 210037
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2025.24.354
  CLC：
- Received：21 November 2024，
  
  Accepted：18 January 2025，
  
  Published Online：26 February 2025，
  
  Published：20 April 2025
- 稿件说明：
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孙兴燊, 林详宇, 赵升云, 范荣玉, 杨自涛, 刘鹤, 宋湛谦. 羧甲基纤维素钠基水溶性黏结剂在锂离子电池硅电极中的应用. 高分子通报, 2025, 38(4), 676–688.

Sun, X. S.; Lin, X. Y.; Zhao, S. Y.; Fan, R. Y.; Yang, Z. T.; Liu, H.; Song, Z. Q. Performance of water-soluble binder based on carboxymethyl cellulose sodium in silicon electrode of lithium-ion battery. Polym. Bull. (in Chinese), 2025, 38(4), 676–688.
孙兴燊, 林详宇, 赵升云, 范荣玉, 杨自涛, 刘鹤, 宋湛谦. 羧甲基纤维素钠基水溶性黏结剂在锂离子电池硅电极中的应用. 高分子通报, 2025, 38(4), 676–688. DOI： 10.14028/j.cnki.1003-3726.2025.24.354.

Sun, X. S.; Lin, X. Y.; Zhao, S. Y.; Fan, R. Y.; Yang, Z. T.; Liu, H.; Song, Z. Q. Performance of water-soluble binder based on carboxymethyl cellulose sodium in silicon electrode of lithium-ion battery. Polym. Bull. (in Chinese), 2025, 38(4), 676–688. DOI： 10.14028/j.cnki.1003-3726.2025.24.354.

摘要

林业生物质资源纤维素的衍生物羧甲基纤维素钠(CMC-Na)，因其环境友好、原料来源广泛、可再生等优势，在锂离子电池领域备受关注。为提升CMC-Na在锂离子电池(LIBs)硅负极的应用性能，以阴离子型多糖CMC-Na和阳离子型高聚物聚乙烯亚胺(PEI)为原料，通过简便高效的物理共混法，构筑基于阴阳离子相互作用的交联型黏结剂(C-PEI-10%)。与油溶性PVDF和纯CMC-Na对比，研究具有三维(3D)交联结构的C-PEI-10%作为锂离子电池硅负极黏结剂的

黏附强度、电池性能和电化学性能。实验表明，使用C-PEI-10%作为黏结剂的电极Si@C-PEI-10%展现出优异的剥离强度，平均剥离力为2.42 N，优于2个对比电极Si@PVDF (0.57 N)和Si@CMC-Na (1.52 N)。在0.2 C电流密度下循环100圈，电极Si@C-PEI-10%的充电比容量高达2249.1 mAh·g

−1

，容量保持率为82.54%，而电极Si@PVDF和Si@CMC-Na的充电比容量分别为166.9和1430.3 mAh·g

−1

，容量保持率分别为10.86%和58.33%。此外，电极Si@C-PEI-10%表现出优异的倍率特性和可逆性，在1 C条件下的充电比容量仍有2030.5 mAh·g

−1

，明显优于电极Si@PVDF的16.7 mAh·g

−1

和Si@CMC-Na的1477.3 mAh·g

−1

。研究表明，通过阴离子和阳离子的静电相互作用原理制备的C-PEI-10%黏结剂具有优异的黏附强度，能显著提高硅电极的电池性能和电化学稳定性。

Abstract

Carboxymethyl cellulose sodium (CMC-Na)

a derivative of cellulose

has attracted considerable attention in the field of lithium-ion batteries (LIBs) because of its environmental friendliness

wide range of raw material sources

and renewability. In this study

a cross-linked binder (C-PEI-10%) based on the electrostatic interaction between the anionic polysaccharide (CMC-Na) and cationic polymer polyethyleneimine (PEI) was prepared through a simple and efficient physical blending method. Compared with PVDF and CMC-Na

the binding strength

cycle stability

and electrochemical performance of C-PEI-10% with a three-dimensional (3D) cross-linking structure as a Si electrode binder for LIBs were studied. The Si electrode using C-PEI-10% as a binder exhibits excellent peel strength

with an average peel force of 2.42 N

superior to the two comparative electrodes Si@PVDF (0.57 N) and Si@CMC-Na (1.52 N). After cycling 100 times at a current density of 0.2 C

the charging specific capacity of the Si@C-PEI-10% electrode is 2249.1 mAh·g

−1

with a capacity retention rate of 82.54%

the charging specific capacities of Si@PVDF and Si@CMC-Na electrodes are 166.9 and 1430.3 mAh·g

−1

respectively

with capacity retention rates of 10.86% and 58.33%. In addition

Si@C-PEI-10% electrode exhibits excellent rate performance and reversibility

with a charging specific capacity of 2030.5 mAh·g

−1

at 1 C

better than 16.7 mAh·g

−1

(

Si@PVDF) and 1477.3 mAh·g

−1

(Si@CMC-Na). The C-PEI-10% binder

prepared by the principle of electrostatic interaction between anions and cations

has excellent peel strength and can significantly improve the cycle performance and electrochemical stability of Si electrodes.

关键词

Keywords

references

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