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- W3186366294 abstract "Potassium-ion batteries (PIBs) have aroused enormous interest from researchers for future electrochemical energy storage due to the low cost and abundant reserve of potassium resource. Although hard carbon materials are regarded as promising candidates for PIBs anodes, it is still a great challenge to achieve a fast and stable charging/discharging process owing to the sluggish kinetics of large-radius potassium ions. Herein, a nitrogen/oxygen co-doped bi-continuous nanoporous carbon scaffold (denoted as BNCS) anode is successfully fabricated using low-cost polyacrylonitrile as precursor through a supercritical CO2 foaming and pyrolysis method without any post-treatment. As an anode material for PIBs, the BNCS delivers a high reversible specific capacity (325 mA h g−1 at 0.1 A g−1 after 300 cycles), excellent rate performance (118 mA h g−1 at 10 A g−1) and ultra-stable cyclability (184 mA h g−1 at 1 A g−1 after 5000 cycles). The attractive electrochemical performances can be ascribed to the synergic contribution from hierarchically interconnected micro-meso-macroporous structure and nitrogen/oxygen co-doping. This template-free and scalable method provides a promising nanoporous carbon strategy for preparing high-performance PIBs anode materials." @default.
- W3186366294 created "2021-08-02" @default.
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- W3186366294 date "2021-09-01" @default.
- W3186366294 modified "2023-09-25" @default.
- W3186366294 title "Supercritical CO2 foaming strategy to fabricate nitrogen/oxygen co-doped bi-continuous nanoporous carbon scaffold for high-performance potassium-ion storage" @default.
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- W3186366294 doi "https://doi.org/10.1016/j.jpowsour.2021.230275" @default.
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