Using Carboxylmethylated Cellulose as Water-Borne Binder to Enhance the Electrochemical Properties of Li4Ti5O12-Based Anodes

Abstract

Abstract The present work reports a systematic study of using carboxymethylated cellulose (CMC) as water-bornebinder to produce Li 4 Ti 5 O 12 -based anodes for manufacture of high rate performance lithium ion batteries. When theLTO-to-CB-to-CMC mass ratio is carefully optimized to be 8:1:0.57, the special capacity of the resulting electrodes is144 mAh·g − 1 at 10 C and their capacity retention was 97.7% after 1000 cycles at 1 C and 98.5% after 500 cycles at5 C, respectively. This rate performance is comparable or even better than that of the electrolytes produced using con-ventional, organic, polyvinylidene fluoride binder. Keywords: Lithium titanate, CMC binder, Electrochemical properties, Long cycle life ······························································································································· ································································································· 1. Introduction Exhaust gas emitted from vehicles is one of the big-gest contributions to the increasingly serious environmen-tal pollution nowadays. Over the years, a considerablenumber of efforts have been put in development of envi-ronmental-friendly, green fuels for automobiles instead offossil fuels [1-3]. In this context, electric vehicles (EVs)and energy storage station (ESS) have been recentlydeveloped on the basis of use of high performance lith-ium ion batteries (LIBs) with long cycle life and highenergy density [4-9]. However, the stability and safety ofLIBs remain the big technical concerns, which limits thecommercialization of LIB [10,11]. To address these issues,novel electrode materials with larger lithium ion storageat high rate have been developed [12]. Among currently developed anode materials, spinelLi