文献类型：期刊文献

英文题名：Dual-Dynamic Biomimetic Binder for High-Performance Silicon Anodes

作者：Liu, Yuanzhi[1];Hou, Keming[2];Li, Jiatong[2];Lian, Cheng[2];Shang, Yazhuo[2];Su, Haiping[2];Liu, Honglai[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn & Low Carbon Technol, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：17

期号：43

起止页码：59444

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20254419421695);WOS:【SCI-EXPANDED(收录号:WOS:001595318900001)】；

基金：This work was financially supported by the National Key R&D Program of China (2022YFA1503501), the National Science Foundation of China (No. 22278127, 22078088), and the Fundamental Research Funds for the Central Universities (No. 2022ZFJH004).

语种：英文

外文关键词：si anode; binder; mussel-inspiredadhesion; dual-dynamic bonds; protocatechuic aldehyde; carboxymethyl chitosan; electrochemical performance

摘要：Silicon (Si) has received widespread attention in recent years due to its high theoretical specific capacity (4200 mAh g-1) and low deembedded lithium potential, making it a highly promising anode material. However, Si materials undergo significant volume expansion after multiple cycles, leading to rapid capacity decay in practical applications. In this study, a dynamically dual-cross-linked biomimetic binder (CMCS/PA@Fe) was developed by forming a coordination compound between protocatechuic aldehyde (PA) and Fe3+ and then combining it with carboxymethyl chitosan (CMCS). Inspired by the adhesive mechanism of mussels, the catechol structure in PA can provide strong adhesion, and Fe3+ introduced through coordination increases the ionic conductivity of the composite material. In addition, the dual-dynamically reversible chemical bonds in the CMCS/PA@Fe binder, namely, Schiff base bonds and coordination bonds, form a dual-buffering mechanism, which effectively suppressed the volume expansion of the Si anode during cycling, relieved the stress inside the electrode, and induced the generation of a stabile solid electrolyte interface layer, thereby resulting in excellent electrochemical performance. After 500 cycles at a high current rate of 4 A g-1, the electrode capacity can still maintain 1184.9 mAh g-1, showing that CMCS/PA@Fe is a strong candidate for next-generation Si anode binders.