Aqueous zinc-based batteries (AZBs) attract tremendous attention due to the abundant and rechargeable zinc anode. Nonetheless, the requirement of high energy and power densities raises great challenge for the cathode development. Herein we construct an aqueous zinc ion capacitor possessing an unrivaled combination of high energy and power characteristics by employing a unique dual-ion adsorption mechanism in the cathode side. Through a templating/activating co-assisted carbonization procedure, a routine protein-rich biomass transforms into defect-rich carbon with immense surface area of 3657.5 m² g⁻¹ and electrochemically active heteroatom content of 8.0 at%. Comprehensive characterization and DFT calculations reveal that the obtained carbon cathode exhibits capacitive charge adsorptions toward both the cations and anions, which regularly occur at the specific sites of heteroatom moieties and lattice defects upon different depths of discharge/charge. The dual-ion adsorption mechanism endows the assembled cells with maximum capacity of 257 mAh g⁻¹ and retention of 72 mAh g⁻¹ at ultrahigh current density of 100 A g⁻¹ (400 C), corresponding to the outstanding energy and power of 168 Wh kg⁻¹ and 61,700 W kg⁻¹. Furthermore, practical battery configurations of solid-state pouch and cable-type cells display excellent reliability in electrochemistry as flexible and knittable power sources.

水系锌基电池 (AZB) 因其丰富且可充电的锌负极而备受关注。尽管如此，高能量和功率密度的要求对正极的开发提出了巨大的挑战。在此，我们通过在阴极侧采用独特的双离子吸附机制，构建了一种具有无与伦比的高能量和功率特性组合的水系锌离子电容器。通过模板/活化辅助碳化程序，常规富含蛋白质的生物质转化为具有 3657.5 m ²  g ^{-1巨大表面积的富含缺陷的碳}电化学活性杂原子含量为 8.0 at%。综合表征和 DFT 计算表明，所获得的碳阴极对阳离子和阴离子均表现出电容性电荷吸附，在不同的放电/充电深度下，这种吸附经常发生在杂原子部分和晶格缺陷的特定位置。双离子吸附机制使组装电池在 100 A g ^-1 (400 C)的超高电流密度下具有 257 mAh g ^{-1的最大容量和 72 mAh g -1}的保留，对应于出色的能量和功率168 Wh kg ^-1和 61,700 W kg ^-1. 此外，固态软包和电缆型电池的实用电池配置在电化学方面表现出出色的可靠性，可作为柔性和可编织的电源。