Three-dimensional interconnected cobalt oxide-carbon hollow spheres arrays as cathode materials for hybrid batteries |
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| Authors: | Jiye Zhan Xinhui Xi Yu Zhong Xiuli Wang and Jiangping Tu |
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| Institution: | State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310028, China;State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310029, China;State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310030, China;State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310031, China |
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| Abstract: | Hierarchical porous metal oxides arrays is critical for development of advanced energy storage devices.Herein, we report a facile template-assisted electro-deposition plus glucose decomposition method for synthesis of multilayer CoO/C hollow spheres arrays. The CoO/C arrays consist of multilayer interconnected hollow composite spheres with diameters of ~350 nm as well as thin walls of ~20 nm.Hierarchical hollow spheres architecture with 3D porous networks are achieved. As cathode of high-rate hybrid batteries, the multilayer CoO/C hollow sphere arrays exhibit impressive enhanced performances with a high capacity(73.5 m Ahg~(-1)at 2 Ag~(-1)), and stable high-rate cycling life(70 m Ahg~(-1)after12,500 cycles at 2 Ag~(-1)). The improved electrochemical performance is owing to the composite hollowsphere architecture with high contact area between the active materials and electrolyte as well as fast ion/electron transportation path. |
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| Keywords: | Cobalt oxide Hollow spheres Cathode Arrays Hybrid battery |
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