Inappropriate pore size distribution and the lack of a suitable lithium-cation source in the device are the key issues limiting the industrial application of biowaste carbon-based lithium-ion capacitors (LICs) to achieve both high energy density and power density for energy storage. Herein, the Li₂O nanowires, decomposed from Li₂C₂O₄ under three-dimensional confinement provided by wasted feather-derived carbon, are introduced as a sacrificial material for self-prelithiation activated carbon materials (prAC) cathode preparation with a high practical specific capacity of 1376 mAh/g. Accompanied by the in-situ formation of Li₂O, the volume of mesopores increases significantly to 0.319 cm³/g (32.1 vol% of the total pore volume) by activation with CO₂ yielded by the decomposition of Li₂C₂O₄. The assembled prAC/graphite LIC demonstrates a high energy density of (122 Wh/kg at 220 W/kg) and a high power density (13 kW/kg at 30 Wh/kg), as well as a superior lifespan of 10,000 cycles at 1 A/g.

不适当的孔径分布和器件中缺乏合适的锂阳离子源是限制生物废料碳基锂离子电容器（LIC）实现高能量密度和功率密度储能的工业应用的关键问题。在此，Li ₂ O 纳米线由 Li ₂ C ₂ O ₄在废弃羽毛衍生碳提供的三维约束下分解而成，被引入作为自预锂化活性碳材料（prAC）阴极制备的牺牲材料，具有高实际比容量为1376mAh/g。伴随着Li _{2 O的}原位形成，通过Li ₂ C ₂ O ₄分解产生的CO ₂活化，中孔体积显着增加至0.319 cm ³ /g（总孔体积的32.1 vol%）。组装的 prAC/石墨 LIC 表现出高能量密度（220 W/kg 时为 122 Wh/kg）和高功率密度（30 Wh/kg 时为 13 kW/kg），以及在1安/克。