The hybridization of highly porous carbon materials and battery-type materials is an effective method for achieving supercapacitors with both high energy density and good rate capability. The structure of the carbon substrate should be carefully designed to meet the requirement of good conductivity and good accessibility to electrolyte and ions. In this work, graphene nanoribbon crosslinked polyimide-derived carbon aerogels (a-GCA) with hierarchical porous structures and large specific surface area of 2413.0 m² g⁻¹ have been first constructed, and then applied as a conductive template for the uniform growth of ultrathin Ni(OH)₂ nanosheets. In the obtained Ni(OH)₂/a-GCA hybrids, a-GCA can provide open and interconnected channels for rapid diffusion of ions and electrons to access Ni(OH)₂ nanosheets for fast Faradaic redox reactions, as well as enhance the stability of Ni(OH)₂ nanosheets. Consequently, the optimized Ni(OH)₂/a-GCA hybrid exhibits a high specific capacitance of 537.0 C g⁻¹ at a charge/discharge current density of 1 A g⁻¹, excellent rate capacitance retention of 78.4% at 10 A g⁻¹. Moreover, the assembled Ni(OH)₂/a-GCA//a-GCA hybrid supercapacitor device delivers a high energy density of 54.8 Wh kg⁻¹ at a powder density of 816 W kg⁻¹. Therefore, the Ni(OH)₂/a-GCA hybrid shows great potential as high-performance electrode materials in applications in energy storage device.

高度多孔的碳材料和电池型材料的混合是获得具有高能量密度和良好倍率能力的超级电容器的有效方法。碳基材的结构应仔细设计，以满足良好的导电性以及对电解质和离子的良好可达性的要求。在这项工作中，首先构建了具有分层多孔结构和大比表面积2413.0 m ²  g ^-1的石墨烯纳米带交联的聚酰亚胺衍生碳气凝胶（a-GCA），然后将其用作导电模板，以均匀生长碳纳米管。超薄Ni（OH）₂纳米片。在获得的Ni（OH）_2中/ a-GCA杂化物，a-GCA可以提供开放和相互连接的通道，用于离子和电子的快速扩散，以访问Ni（OH）₂纳米片以进行快速的法拉第氧化还原反应，并增强Ni（OH）₂纳米片的稳定性。因此，优化的Ni（OH）₂ / a-GCA杂化体在1 A g ^-1的充/放电电流密度下显示出537.0 C g ^-1的高比电容，在10 A g时的优良电容保持率达78.4％^-1。而且，组装的Ni（OH）₂ / a-GCA // a-GCA混合超级电容器装置以816 W kg ^-1的粉末密度提供54.8 Wh kg ^-1的高能量密度。。因此，Ni（OH）₂ / a-GCA杂化物作为高性能电极材料在储能装置中的应用显示出巨大的潜力。