Citric Acid as a Small Molecule Binder for Si-Based Li-Ion Battery Anode Materials

被引：1

作者：

Salehabadi, Mina ^{[1
]}

Medhi, K. ^{[1
]}

Werner-Zwanziger, U. ^{[1
]}

Obrovac, M. N. ^{[1
,2
,3
]}

机构：

[1] Dalhousie Univ, Dept Chem, Halifax, NS B3H 4R2, Canada

[2] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 4R2, Canada

[3] Dalhousie Univ, Dept Proc Engn & Appl Sci, Halifax, NS B3H 4R2, Canada

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2025年 / 172卷 / 02期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

batteries; -; Li-ion; electrode binders; silicon anode; HIGH-CAPACITY; ELECTROCHEMICAL-BEHAVIOR; CYCLING PERFORMANCE; NEGATIVE ELECTRODES;

D O I：

10.1149/1945-7111/adb185

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this study, citric acid (CA) dissolved in propylene glycol (PG) was shown to be an effective binder/solvent system for Si-based anode materials in Li-ion batteries. In this system, PG serves both as a slurry solvent and provides viscosity to the slurry to inhibit the settling of active particles and for proper rheology during the coating process, while the small CA molecule serves as a binder/artificial solid electrolyte interphase. After 50 cycles, SiO/carbon black/CA electrodes had a higher capacity retention (93%) than conventional electrodes with lithium polyacrylate (LiPAA) polymeric binder (68%), due to superior maintenance of adhesion amongst active particles. This demonstrates that small molecules may be used as effective binders for Si-based anode materials when a slurry solvent is used that can take on the role of maintaining the slurry rheology.

引用

页数：9

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