Facile synthesis of copper-manganese spinel anodes with high capacity and cycling performance for lithium-ion batteries

Abstract

Copper-manganese spinel containing anodes were synthesized by a facile sol-gel method and evaluated in lithium-ion battery applications for the first time. The synergistic effects between copper-manganese and the aqueous binder (sodium carboxymethyl cellulose) provided a high specific capacity and excellent cycling performance. It was found that the specific capacity of the copper-manganese spinel remained at 608mAhg−1 after 100 cycles at a current density of 200mAg−1. Furthermore, a relatively high reversible capacity of 278mAhg−1 could be obtained at a current density of 2000mAg−1, indicating a good rate capability. These studies suggest that copper-manganese spinel is a promising material for lithium-ion battery applications due to a combination of good electrochemical performance and low cost.