The effect of LiBF4 concentration on the discharge and stability of LiMn2O4 half cell Li ion batteries

Abstract

Electrolytes were prepared with different LiBF4 salt concentrations in the ratio of 2:1 (w/w) Ethylene Carbonate (EC): Dimethyl Carbonate (DMC) solvents. Different LiBF4 concentrations were used in the electrolytes to assemble half-cells containing metallic Li anode and nanostructured LiMn2O4 cathode material. To investigate the effect of LiBF4 salt concentration on the electrochemical performance of nanostructured LiMn2O4 cathode material, electrochemical tests were performed at room temperature. For LiBF4-EC-DMC based electrolytes, the optimum LiBF4 salt concentration was found and results showed that higher salt concentration provides higher electrochemical capacity for the bare nanostructured LiMn2O4 cathode materials but did not result in preventing capacity fade due to electrode degradation. (C) 2015 Elsevier Ltd. All rights reserved.