Commercializable Fluorine-Doped Porous Carbon Toward Advanced 4.5 V-Class Lithium-Ion Capacitors
Sen Liu , Minyu Jia , Fulu Chu , Hao Jiang , Jiale Jia , Jinfeng Sun , Yang Liu , Linrui Hou , Changzhou Yuan
Energy & Environmental Materials ›› 2025, Vol. 8 ›› Issue (4) : e70002
Commercializable Fluorine-Doped Porous Carbon Toward Advanced 4.5 V-Class Lithium-Ion Capacitors
Low specific capacitances and/or limited working potential (≤4.5 V). of the prevalent carbon-based positive electrodes as the inborn bottleneck seriously hinder practical advancement of lithium-ion capacitors. Thus, breakthroughs in enhancement of both specific capacitances and upper cutoff potentials are enormously significant for high-energy density lithium-ion capacitors. Herein, we first meticulously design and scalably fabricate a commercializable fluorine-doped porous carbon material with competitive tap density, large active surface, appropriate aperture distribution, and promoted affinity with the electrolyte, rendering its abundant electroactive inter-/surface and rapid transport. Theoretical calculations authenticate that fluorine-doped porous carbon possesses lower adsorption energy and stronger interaction with . Thanks to the remarkable structural/compositional superiority, when served as a positive electrode toward lithium-ion capacitors, the commercial-level fluorine-doped porous carbon showcases the record-breaking electrochemical properties within a wider working window of 2.5–5.0 V (vs Li/Li+) in terms of high-rate specific capacitances and long-duration stability, much superior to commercial activated carbon. More significantly, the 4.5 V-class graphite//fluorine-doped porous carbon lithium-ion capacitors are first constructed and manifest competitive electrochemical behaviors with long-cycle life, modest polarization, and large energy density. Our work provides a commendable positive paradigm and contributes a major step forward in next-generation lithium-ion capacitors and even other high-energy density metal-ion capacitors.
fluorine-doping porous carbon / high operating potentials / improved capacitance / lithium-ion capacitors / positive electrodes
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2025 The Author(s). Energy & Environmental Materials published by John Wiley & Sons Australia, Ltd on behalf of Zhengzhou University.
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