Sajjad Muhammad, Cheng Fang, Lu Wen
Institute of Energy Storage Technologies, Yunnan University Kunming 650091 P. R. China
College of Chemical Sciences and Engineering, Yunnan University Kunming 650091 P. R. China.
RSC Adv. 2021 Jul 22;11(41):25450-25460. doi: 10.1039/d1ra02445k. eCollection 2021 Jul 19.
Metal ion capacitors have gained a lot of interest as a new kind of capacitor-battery hybrid energy storage system because of their high power density while maintaining energy density and a long lifetime. Potassium ion hybrid capacitors (PIHCs) have been suggested as possible alternatives to lithium-ion/sodium-ion capacitors because of the plentiful potassium supplies, and their lower standard electrode potential and low cost. However, due to the large radius of the potassium ion, PIHCs also face unsatisfactory reaction kinetics, low energy density, and short lifespan. Recently, transition metal chalcogenide (TMC)-based materials with distinctive structures and fascinating characteristics have been considered an emerging candidate for PIHCs, owing to their unique physical and chemical properties. This mini-review mainly focuses on the recent research progress on TMC-based materials for the PIHC applications summarized. Finally, the existing challenges and perspectives are given to improve further and construct advanced TMC-based electrode materials.
金属离子电容器作为一种新型的电容-电池混合储能系统，因其高功率密度、同时保持能量密度和长寿命而备受关注。钾离子混合电容器（PIHCs）由于钾资源丰富、标准电极电位较低且成本低廉，被认为是锂离子/钠离子电容器的可能替代品。然而，由于钾离子半径较大，PIHCs也面临反应动力学不理想、能量密度低和寿命短等问题。近年来，具有独特结构和迷人特性的过渡金属硫族化物（TMC）基材料因其独特的物理和化学性质，被认为是PIHCs的新兴候选材料。本综述主要聚焦于总结基于TMC的材料在PIHC应用方面的最新研究进展。最后，给出了现有挑战和展望，以进一步改进并构建先进的基于TMC的电极材料。
