文献类型：期刊文献

英文题名：A Cellulose Reinforced Multifunctional Binder for High-Performance Silicon Anodes

作者：Hou, Keming[1];Li, Xinrui[2];Wang, Chenyan[1];Yang, Hongtao[1];Zhao, Jiayi[1];Li, Jiatong[1];Shang, Yazhuo[1];Su, Haiping[1];Liu, Honglai[1,3]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Suzhou Inst Nanotech & Nanob SINANO, CAS Ctr Excellence Nanosci, I Lab, Suzhou 215123, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：15

期号：46

起止页码：53455

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20234915155904);WOS:【SCI-EXPANDED(收录号:WOS:001108509700001)】；

基金：This work was financially supported by the National Key R&D Program of China (Grant 2022YFA1503501), the National Science Foundation of China (Grant 21908053), and the Fundamental Research Funds for the Central Universities (Grant 2022ZFJH004).

语种：英文

外文关键词：lithium-ion battery; Sianodes; multifunctional; polymer binder; SEI

摘要：Silicon (Si) has garnered significant interest as a potential anode material for next-generation lithium-ion batteries due to its high theoretical capacity. However, Si anodes suffer from substantial volume expansion during the charge and discharge processes, which severely undermines their cycling stability. To address this issue, developing novel binders has become an effective strategy to suppress the volume expansion of Si anodes. In this study, a multifunctional polymer binder (DCCS) was designed by the cross-linking of dialdehyde cellulose nanocrystal (DACNC) and carboxymethyl chitosan (CMCS), which forms a 3D network structure via Schiff-base bonds. The DCCS binder with abundant chemical and hydroxyl bonds shows strong adhesion between Si nanoparticles and current collectors, thus enhancing the mechanical properties of the electrode. Furthermore, the DACNC also served as the protecting buffer layer to release the inner stress and stabilize the solid electrolyte interface (SEI). At 4 A g(-1), the resulting Si@25%DCCS electrode demonstrated a capacity of 1637 mAh g(-1) after 500 cycles, with an average capacity fading rate of 0.07% per cycle. Therefore, this multifunctional binder is considered a promising binder for high-performance Si anodes.