Electrochemical performance of microbatteries using crystallized LiCoO2 and nano-crystalline LiMn2O4 film as cathodes and amorphous LiNiVO4 as anode

摘要

Three different electrode films of highly crystallized LiCoO2, nano-crystalline LiMn2O4 as cathode and amorphous LiNiVO4 as anode were grown on stainless steel substrates by pulsed laser deposition. Microbatteries were assembled using liquid electrode of LiPF6. The microbatteries were electrochemically tested by charge/discharge cycling and cyclic voltammetry. Both LiCoO2/LiPF6/LiNiVO4 and LiMn2O4/LiPF6/LiNiVO4 cells showed smooth charge/discharge curves. Although the cells faced a fast capacity loss in the first 10 cycles, about 20 mu A/cm(2) mu m of discharge capacity was attainable after 20 cycles.