Controllable synthesis of hierarchical nanoporous carbon@Ni(OH)2 rambutan-like composite microspheres for high-performance hybrid supercapacitor
Controllable synthesis of hierarchical nanoporous carbon@Ni(OH)2 rambutan-like composite microspheres for high-performance hybrid supercapacitor
复制标题
用于高性能混合超级电容器的分级纳米孔碳@Ni(OH)2红毛丹类复合微球的可控合成
DOI：
10.1016/j.arabjc.2021.103580
复制
发表时间：
2021-11
影响因子：
6
通讯作者：
Jianxiong Xu
中科院分区：
文献类型：
--
作者：
Na Li;Kai Yuan;Tengjia Gao;Shun Li;Jianliang Qin;Yirong Zhu;Jingjing Du;Lijian Xu;Jianxiong Xu
设计具有优良电化学性能的新型储能装置电极材料对能源的可持续发展具有重要意义。本文通过简单的原位化学沉积法在多级纳米多孔碳/氢氧化镍（HNCMs@Ni（OH）2）复合材料上制备了Ni（OH）2纳米晶。通过调节沉积量，得到了具有核壳结构的Rambutan @Ni（OH）2微球，HNCMs表面包覆有毛状的Ni（OH）2。由于氢氧化镍的高比容量和HNCMs的互联分级多孔结构，合成的Rambutan型HNCMs@Ni（OH）2微球作为电极材料具有优异的电化学性能，在1A/g时比容量高达248.9mAh/g，在20 A/g时电容保持率为62.9%。此外，组装了具有类似拉姆丁烷的HNCMs@Ni（OH）2微球作为阴极和HNCMs作为阳极的混合超级电容器，并且在173.3W/kg的功率密度下显示出41.3Wh/kg的相当的能量密度和在5A/g下20，000次循环后85.2%的高容量保持率。作为概念验证示例，所制造的混合超级电容器可以用作能量源以瞬时点亮红色LED指示器。我们认为，所制备的类拉姆丁烷HNCMs@Ni（OH）2微球在构建先进的储能器件方面具有巨大的潜力。
Design of electrode materials with excellent electrochemical properties for advanced energy storage device are important to the sustainable development of energy resources. In this manuscript, a novel hierarchical nanoporous carbon@nickel hydroxide (HNCMs@Ni(OH)2) composites were prepared through simple in-situ chemical deposition of Ni(OH)2nanocrystals on HNCMs. By tailoring the deposition amount, core–shell structured rambutan-like HNCMs@Ni(OH)2microspheres with hairy nickel hydroxide nanocrystal covered on HNCMs were obtained. Ascribed to the high specific capacitance of nickel hydroxide and the interconnected hierarchical porous structure of HNCMs, the resultant rambutan-like HNCMs@Ni(OH)2microspheres as electrode materials display outstanding electrochemical properties including high specific capacity of 248.9 mAh/g at 1 A/g and good capacitance retention of 62.9% at 20 A/g. Furthermore, a hybrid supercapacitor with rambutan-like HNCMs@Ni(OH)2microspheres as cathode and HNCMs as anode were assembled and showed a comparable energy density of 41.3 Wh/kg at the power density of 173.3 W/kg and high capacity retention of 85.2% after 20,000 cycles at 5 A/g. As a proof of concept example, the fabricated hybrid supercapacitor can be utilized as energy source to instantaneous light up a red LED indicator. We envisioned that the as-prepared rambutan-like HNCMs@Ni(OH)2microspheres have great potential in constructing of advanced energy storage devices.