CMC as a binder in LiNi0.4Mn1.6O4 5V cathodes and their electrochemical performance for Li-ion batteries

• DOI: 10.1016/j.electacta.2011.11.094
• Publication Date: 2011-12-17T06:59:48Z
• Authors: Zhongli Wang; Nicolas Dupré; Anne-Claire Gaillot; Bernard Lestriez; Jean-Frédéric Martin; Lise Daniel; Sébastien Patoux; Dominique Guyomard
• Keywords: Binder; EIS; Lithium ion batteries; CMC; [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]; 600; 540; 01 natural sciences; 7. Clean energy; 5V batteries; 0104 chemical sciences

Abstract Aqueous processing would reduce the costs and toxicity associated with the making of the composite electrode. In the present study, carboxymethyl cellulose is used as a binder for 5 V cathode material LiNi0.4Mn1.6O4. Compared with electrodes using polyvinylidene difluoride binder, CMC-based LiNi0.4Mn1.6O4 electrodes display a better discharge capacity at all rates. At 0.2 C, the discharge capacity is close to the theoretical capacity (146 mAh g−1) and the self-discharge is 10% lower. Polyvinylidene difluoride can be efficiently replaced by carboxymethyl cellulose for LiNi0.4Mn1.6O4 in terms of electrochemical performance and brings the advantage of an environment friendly and low cost electrode processing.