The design of a flexible electrode based on carbon cloth (CC) which can solve the problem of the weak coupling effect and binding force between the substrate and active materials has stimulated intensive research on configuring supercapacitors with these materials to achieve high energy and power densities. In this paper, a N,P-doped carbon (NPC) layer as an intermediate layer is sandwiched between the active materials and carbon cloth, which can not only enable the stable and homogeneous growth of active materials on the carbon fiber but also maintain the long cycle life of the flexible electrode in supercapacitors owing to its rich structural defects, excellent hydrophilic characteristics and mechanism of heteroatom doping. Such a sandwiched flexible electrode consisting of bimetallic sulfide (BS), an N,P-doped carbon layer and carbon cloth (denoted as CC–NPC–BS) is assembled as a positive electrode in a solid-state asymmetric supercapacitor (ASC) device, which delivers a high energy density of 56.7 W h kg⁻¹ at a power density of 1.5 kW kg⁻¹ and has outstanding long cycling stability with 85% capacitance retention after 15 000 cycles.

中文翻译：

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用于高性能非对称超级电容器的双金属硫化物和碳基衬底之间的中间碳层的设计†

基于碳布（CC）的柔性电极的设计可以解决基板与活性材料之间的弱耦合效应和结合力的问题，这刺激了人们对用这些材料配置超级电容器以实现高能量和功率密度的深入研究。本文将N，P掺杂碳（NPC）层作为中间层夹在活性材料和碳布之间，这不仅可以使活性材料在碳纤维上稳定，均匀地生长，而且可以保持碳纤维的活性。由于其丰富的结构缺陷，出色的亲水性和杂原子掺杂机理，使得柔性电容器在超级电容器中的循环寿命更长。这种由双金属硫化物（BS），N，^-1在1.5 kW kg ^-1的功率密度下具有出色的长期循环稳定性，在15 000次循环后电容保持率为85％。