Abstract Cobalt silicate (Co2SiO4) have been received increasing attention as the electrode for energy storage devices recently, however, its specific capacitance achieved is far from being desired for supercapacitor electrode. Herein, nickel hydroxide coated on Co2SiO4 nanobelts [denoted as Co2SiO4@Ni(OH)2] core–shell structure was synthesized using Co2SiO4 nanobelts as the template to improve electrochemical properties of Co2SiO4. The as-synthesized Co2SiO4@Ni(OH)2 displays surface area with 270 m2 g−1. As the supercapacitor electrode, at 1 A g−1, the specific capacitance of Co2SiO4@Ni(OH)2 is achieved to be 1101 F g−1, which is superior to that of Co2SiO4 (193 F g−1) and Ni(OH)2 (380 F g−1). This work demonstrates that Co2SiO4@Ni(OH)2 core–shell structure can improve the specific capacitance of Co2SiO4 and it can be considered as a promising candidate for supercapacitor electrode.

中文翻译：

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合成 Co2SiO4/Ni(OH)2 核壳结构作为具有增强电化学性能的超级电容器电极材料

摘要 近年来，硅酸钴（Co2SiO4）作为储能器件的电极受到越来越多的关注，但其实现的比电容远非超级电容器电极所期望的。在此，以 Co2SiO4 纳米带为模板合成了包覆在 Co2SiO4 纳米带上的氢氧化镍 [表示为 Co2SiO4@Ni(OH)2] 核壳结构，以改善 Co2SiO4 的电化学性能。合成后的 Co2SiO4@Ni(OH)2 表面积为 270 m2 g-1。作为超级电容器电极，在 1 A g-1 时，Co2SiO4@Ni(OH)2 的比电容达到 1101 F g-1，优于 Co2SiO4 (193 F g-1) 和 Ni( OH)2 (380 F g-1)。