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- W4321330700 abstract "Abstract Nitrogen doping is an effective strategy to improve potassium ion storage of carbon electrodes via the creation of adsorption sites. However, various undesired defects are often uncontrollably generated during the doping process, limiting doping effect on capacity enhancement and deteriorating the electric conductivity. Herein, boron element is additionally introduced to construct 3D interconnected B, N co‐doped carbon nanosheets to remedy these adverse effects. This work demonstrates that boron incorporation preferentially converts pyrrolic N species into BN sites with lower adsorption energy barrier, further enhancing the capacity of B, N co‐doped carbon. Meanwhile, the electric conductivity is modulated via the conjugation effect between the electron‐rich N and electron‐deficient B, accelerating the charge‐transfer kinetics of potassium ions. The optimized samples deliver a high specific capacity, high rate capability, and long‐term cyclic stability (532.1 mAh g −1 at 0.05 A g −1 , 162.6 mAh g −1 at 2 A g −1 over 8000 cycles). Furthermore, hybrid capacitors using the B, N co‐doped carbon anode deliver a high energy and power density with excellent cycle life. This study demonstrates a promising approach using BN sites for adsorptive capacity and electric conductivity enhancement in carbon materials for electrochemical energy storage applications." @default.
- W4321330700 created "2023-02-19" @default.
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- W4321330700 date "2023-02-17" @default.
- W4321330700 modified "2023-10-17" @default.
- W4321330700 title "Constructing Active BN Sites in Carbon Nanosheets for High‐Capacity and Fast Charging Toward Potassium Ion Storage" @default.
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- W4321330700 doi "https://doi.org/10.1002/smll.202300440" @default.
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