Graphene-anchored NiCoO2 nanoarrays as supercapacitor electrode for enhanced electrochemical performance
Graphene-anchored NiCoO2 nanoarrays as supercapacitor electrode for enhanced electrochemical performance
复制标题
DOI：
10.1016/j.electacta.2017.07.158
复制
发表时间：
2017-09
影响因子：
6.6
通讯作者：
Yingfang Zhu;Haifu Huang;Guangxu Li;Xianqing Liang;Wenzheng Zhou;Jin Guo;Wenlou Wei;Shaolong Tang
中科院分区：
文献类型：
--
作者：
Yingfang Zhu;Haifu Huang;Guangxu Li;Xianqing Liang;Wenzheng Zhou;Jin Guo;Wenlou Wei;Shaolong Tang
采用简单的水热合成方法，在泡沫镍（NF）上直接生长了多孔花状NiCoO 2/石墨烯（NiCoO 2/rGO）复合纳米阵列。由于NiCoO 2纳米片的多孔花状结构和具有高电导率的石墨烯的引入，NiCoO 2/rGO复合纳米阵列显示出上级的电化学性能，包括高比容量（1286 C g− 1，0.5 A g−1）和良好的倍率性能（1071.5C g−1，83.3%容量保持率，12 A g−1）。用NiCoO 2/rGO和rGO/NF组装的非对称超级电容器也显示出良好的性能，在288 W kg− 1功率密度下的能量密度为38.5 Wh kg− 1，并且在2000次循环后具有86.9%的良好循环稳定性。这些结果表明NiCoO 2/rGO复合纳米阵列作为一种有前途的超级电容器电极材料的潜在应用。
Porous flower-like NiCoO2and graphene (NiCoO2/rGO) composite nanoarrays were grown directly on Ni foam (NF) without any binders by a simple hydrothermal synthesis method. Due to the porous flowers-like architecture of ultrathin NiCoO2nanoflakes and the introduction of graphene with the high electrical conductivity, NiCoO2/rGO composite nanoarrays showed superior electrochemical performance including high specific capacity (1286C g−1at 0.5 A g−1), and good rate capability (1071.5C g−1, 83.3% capacity retention at 12 A g−1). The asymmetric supercapacitor assembled with NiCoO2/rGO and rGO/NF also showed good performance with the energy density of 38.5 Wh kg−1at 288 W kg−1power density and good cycle stability of 86.9% after 2000 cycles. These results demonstrate the potential application of NiCoO2/rGO composite nanoarrays as a promising electrode material for supercapacitors.