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- W4313292079 abstract "Defect-enriched carbon nanomaterials possess high potassium storage capacity and rapid ion transport capability; nevertheless, their rate performance is restricted by the deteriorated electronic conductivity induced by over-broken sp2-C conjugated structure. Herein, intrinsic defect-enriched carbon nanosheet (DCS) with controllable defect density is reported for the high-efficiency anode of potassium-ion batteries (PIBs). The DCS constructed by internal sp2-C configuration and external sp3-C defects can ensure good electron transport ability and afford abundant active sites for K+ storage. As PIBs anode, DCS-24 obtained by ball-milling for 24 h with optimized defect density delivers a high specific capacity of 270.9 mAh g−1 at 0.5 C, an excellent rate performance (189 mAh g−1 at 10 C), as well as long cycle durability (255.1 mAh g−1 over 3000 cycles at 1 C). Electrochemical results and density functional theory simulations indicate that the intrinsic defects of carbon materials improve the capacitive K+ storage capacity, speed up the K+ diffusion, and lower the K+ adsorption energy." @default.
- W4313292079 created "2023-01-06" @default.
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- W4313292079 date "2023-02-01" @default.
- W4313292079 modified "2023-10-17" @default.
- W4313292079 title "Controllable engineering of intrinsic defects on carbon nanosheets enables fast and stable potassium storage performance" @default.
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- W4313292079 doi "https://doi.org/10.1016/j.carbon.2022.12.076" @default.
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