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MS 2 (M = Co and Ni) Hollow Spheres with Tunable Interiors for High‐Performance Supercapacitors and Photovoltaics
Author(s) -
Peng Shengjie,
Li Linlin,
Tan Huiteng,
Cai Ren,
Shi Wenhui,
Li Chengchao,
Mhaisalkar Subodh G.,
Srinivasan Madhavi,
Ramakrishna Seeram,
Yan Qingyu
Publication year - 2014
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201303273
Subject(s) - materials science , supercapacitor , capacitance , electrolyte , spheres , chemical engineering , nanotechnology , redox , energy storage , electrode , photovoltaics , specific surface area , photovoltaic system , catalysis , ecology , power (physics) , chemistry , physics , quantum mechanics , astronomy , biology , engineering , metallurgy , biochemistry
We demonstrate in this paper facile synthesis of CoS 2 and NiS 2 hollow spheres with various interiors through a solution‐based route. The obtained CoS 2 microspheres constructed by nanosheets display a three‐dimensional architecture with solid, yolk‐shell, double‐shell, and hollow interiors respectively, with continuous changes in specific surface areas and pore‐size distributions. Especially, the CoS 2 hollow spheres demonstrate excellent supercapacitive performance including high specific capacitance, good charge/discharge stability and long‐term cycling life, owing to the greatly improved faradaic redox reaction and mass transfer. Furthermore, CoS 2 hollow spheres exhibit superior electrocatalytic activity for disulfide/thiolate (T 2 /T − ) redox electrolyte in dye‐sensitized solar cells (DSCs). Therefore, this work provides a promising approach for the design and synthesis of structure tunable materials with largely enhanced supercapacitor behavior, which can be potentially applied in energy storage devices.