Zhong Guobao, Lei Shun, Hu Xiang, Ji Yaxin, Liu Yangjie, Yuan Jun, Li Junwei, Zhan Hongbing, Wen Zhenhai
College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China.
CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, China.
ACS Appl Mater Interfaces. 2021 Jun 30;13(25):29511-29521. doi: 10.1021/acsami.1c04278. Epub 2021 Jun 15.
Potassium-ion hybrid capacitors (PIHCs) shrewdly integrate the merits of the high energy density of battery-type anode and the high power density of capacitor-type cathode, promising prospects for potential application in a diversity of fields. Here, we report the synthesis of P-doped porous carbon nanosheets (P-PCNs) with favorable features as electrochemical storage materials, including ultrahigh specific surface area and rich activity sites. The P-PCN as Janus electrodes show highly attractive electrochemical properties of high capacity and remarkable stability for fast K storage and manifest high capacitance for PF adsorption. The P-PCNs are applied as both anode and cathode materials to set up dual-carbon PIHCs, which show the capability to deliver a high energy/power density (165.2 Wh kg and 5934.4 W kg) as well as remarkable long-life capability.
钾离子混合电容器（PIHCs）巧妙地融合了电池型阳极的高能量密度和电容器型阴极的高功率密度的优点，在众多领域具有潜在应用的广阔前景。在此，我们报道了具有优异特性的P掺杂多孔碳纳米片（P-PCNs）的合成，这些特性使其成为电化学储能材料，包括超高比表面积和丰富的活性位点。作为双面电极的P-PCN表现出极具吸引力的电化学性能，即具有高容量和出色的稳定性，可实现快速钾存储，并且对PF吸附表现出高电容。P-PCNs被用作阳极和阴极材料来构建双碳PIHCs，其表现出能够提供高能量/功率密度（165.2 Wh kg和5934.4 W kg）以及出色的长寿命性能。
