A hierarchical NiO/C hollow sphere composite (NiO/C-HS) was prepared via semi-sacrificial template-assisted hydrothermal and calcination methods. NiO/C-HS, with well-dispersed NiO nanosheets supported by carbon hollow spheres, exhibited excellent electrochemical performance. The method was heuristic for the design of other composites and suitable for ameliorating the poor stability of transition metal oxides.

中文翻译：

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分层NiO / C空心球复合材料的制备及其增强的超级电容器性能†

通过半牺牲模板辅助水热和煅烧方法制备了分层的NiO / C空心球复合材料（NiO / C-HS）。具有由碳空心球支撑的分散良好的NiO纳米片的NiO / C-HS表现出优异的电化学性能。该方法对于其他复合材料的设计具有启发性，并且适合于改善过渡金属氧化物的不良稳定性。