In this work, we report the fabrication of a high performance thin-film microbattery composed of TiO2nts as anode, a polymer thin layer as electrolyte, and porous LiNi0.5Mn1.5O4 as cathode. The effect of electrolyte electrodeposition into both the anode and cathode prior assembling shows a significant increase of the discharge capacity values due to the improvement of the electrode-electrolyte interface. The full microbattery reveals an operating voltage of 2.1 V with high electrochemical performance at C/10 with a discharge capacity of 169 mAh g−1 (82 μAh cm−2 μm−1) at the first cycle and 150 mA h g−1 (70 μAh cm−2 μm−1) at the 10th cycle. Comparison of the capacities at C/10 and C/2 with the microbattery composed of raw electrodes revealed an increment of around 100% even for 100 cycles.
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