Carboxymethyl cellulose lithium (CMC-Li) as a novel binder and its electrochemical performance in lithium-ion batteries

The novel water-based binder CMC-Li is synthesized using cotton as a raw material. The mechanism of CMC-Li as a binder is reported. CMC-Li as a binder can increase the contents of Li+, improving the diffusion efficiency and specific capacity. The battery with CMC-Li as the binder retained 97.8 % of the initial reversible capacity after 200 cycles at 176 mAh g(-1), which is beyond the theoretical specific capacity of lithium iron phosphate (LiFePO4, LFP). The cyclic voltammetry and electrochemical impedance spectroscopy curves are weaker. The batteries obtain good electrochemical properties, are pollution free and have excellent stability.