Enhanced electrochemical properties of LiFePO4 (LFP) cathode using the carboxymethyl cellulose lithium (CMC-Li) as novel binder in lithium-ion battery

Lei Qiu; Ziqiang Shao; Daxiong Wang; Wenjun Wang; Feijun Wang; Jianquan Wang

doi:10.1016/j.carbpol.2014.05.027

Enhanced electrochemical properties of LiFePO4 (LFP) cathode using the carboxymethyl cellulose lithium (CMC-Li) as novel binder in lithium-ion battery

Carbohydr Polym. 2014 Oct 13:111:588-91. doi: 10.1016/j.carbpol.2014.05.027. Epub 2014 May 23.

Authors

Lei Qiu¹, Ziqiang Shao², Daxiong Wang³, Wenjun Wang³, Feijun Wang³, Jianquan Wang³

Affiliations

¹ College of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China; Beijing Engineering Technology Research Centre for Cellulose and Its Derivative Materials, Beijing 100081, PR China. Electronic address: qiulei1010@126.com.
² College of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China; Beijing Engineering Technology Research Centre for Cellulose and Its Derivative Materials, Beijing 100081, PR China. Electronic address: shaoziqiang409@163.com.
³ College of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China; Beijing Engineering Technology Research Centre for Cellulose and Its Derivative Materials, Beijing 100081, PR China.

PMID: 25037391
DOI: 10.1016/j.carbpol.2014.05.027

Abstract

Novel water-based binder CMC-Li is synthesized using cotton as raw material. The mechanism of the CMC-Li as a binder is reported. Electrochemical properties of batteries cathodes based on commercially available lithium iron phosphate (LiFePO4, LFP) and CMC-Li as a water-soluble binder are investigated. CMC-Li is a novel lithium-ion binder. Compare with conventional poly(vinylidene fluoride) (PVDF) binder, and the battery with CMC-Li as the binder retained 97.8% of initial reversible capacity after 200 cycles at 176 mAh g(-1), which is beyond the theoretical specific capacity of LFP. Constant current charge-discharge test results demonstrate that the LFP electrode using CMC-Li as the binder has the highest rate capability, follow closely by that using PVDF binder. The batteries have good electrochemical property, outstanding pollution-free and excellent stability.

Keywords: Binder; CMC-Li; Cellulose derivative; LiFePO(4); Lithium battery.