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- W4319315050 abstract "The crystal phase structure of cathode material plays an important role in the cell performance. During cycling, the cathode material experiences immense stress due to phase transformation, resulting in capacity degradation. Here, we show phase-engineered VO2 as an improved potassium-ion battery cathode; specifically, the amorphous VO2 exhibits superior K storage ability, while the crystalline M phase VO2 cannot even store K+ ions stably. In contrast to other crystal phases, amorphous VO2 exhibits alleviated volume variation and improved electrochemical performance, leading to a maximum capacity of 111 mAh g-1 delivered at 20 mA g-1 and over 8 months of operation with good coulombic efficiency at 100 mA g-1. The capacity retention reaches 80% after 8500 cycles at 500 mA g-1. This work illustrates the effectiveness and superiority of phase engineering and provides meaningful insights into material optimization for rechargeable batteries." @default.
- W4319315050 created "2023-02-08" @default.
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- W4319315050 date "2023-02-06" @default.
- W4319315050 modified "2023-10-13" @default.
- W4319315050 title "Phase-engineered cathode for super-stable potassium storage" @default.
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- W4319315050 doi "https://doi.org/10.1038/s41467-023-36385-4" @default.
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