Effects of water‐based binders on electrochemical performance of manganese dioxide cathode in mild aqueous zinc batteries

作者：Hee Jung Chang, Ismael A. Rodríguez‐Pérez, Matthew Fayette, Nathan Canfield, Huilin Pan, Daiwon Choi, Xiaolin Li, David Reed · 发表于：Carbon Energy · 年份：2020 · DOI：10.1002/cey2.84 · 被引用次数：90 · 研究领域：Advanced battery technologies research、Advanced Battery Materials and Technologies、Supercapacitor Materials and Fabrication

Abstract In the majority of rechargeable batteries including lithium‐ion batteries, polyvinylidene fluoride (PVdF) binders are the most commonly used binder for both anode and cathode. However, using PVdF binder requires the organic solvent of N ‐methyl‐2‐pyrrolidone which is expensive, volatile, combustible, toxic, and has poor recyclability. Therefore, switching to aqueous electrode processing routes with non‐toxic binders would provide a great leap forward towards the realization of ideally fully sustainable and environmentally friendly electrochemical energy storage devices. Various water‐soluble binders (aqueous binders) were characterized and compared to the performance of conventional PVdF. Our study demonstrates that the electrochemical performance of Zn/MnO 2 aqueous batteries is significantly improved by using sodium carboxymethyl cellulose (CMC) binder. In addition, CMC binders offer desirable adhesion, good wettability, homogeneous material distribution, and strong chemical stability at certain pH levels (3.5–5) without any decomposition for long‐cycle life.