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δ-MnO2 is a promissing electrode material of supercapacitors and Li ion batteries (LIBs) owing to its low cost, layer structure and composite valence of Mn. However, the unfavorable electronic conductivity of δ-MnO2 restricts its rate capability in both of the two devices. Herein, a vertically standing Ti nanowire array modified with δ-MnO2 nanoflakes is prepared by a electrodeposition method, and...
Capacity fading of a commercial 18650 LiFePO 4 /graphite cell was investigated at different temperatures (25, 40, 50 and 60°C) until 30% of its capacity was lost. Capacity decrease of the cell is in linear relationship with cycle number and the slope of the capacity-fading line is increased by elevating temperature. The capacity-fade mechanisms were investigated by using a combination of electrochemical,...
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