Hydrothermal Synthesis of Nickel Phosphate Nanorods for High‐Performance Flexible Asymmetric All‐Solid‐State Supercapacitors |
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| Authors: | Junhong Zhao Shaomei Wang Zhen Run Guangqin Zhang Weimin Du Huan Pang |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan, P. R. China;2. State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, Jiangsu, P. R. China |
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| Abstract: | Ni20(OH)12(H2O)6](HPO4)8(PO4)4]·12H2O nanorods are successfully synthesized via a one‐pot hydrothermal reaction. A high‐performance flexible asymmetric all‐solid‐state supercapacitor based on the obtained Ni20(OH)12(H2O)6](HPO4)8(PO4)4]·12H2O nanorods (positive electrode) and graphene nanosheets (negative electrode) is successfully assembled. It is the first report of this nanomaterial applied for all‐solid‐state supercapacitors. Interestingly, a maximum volumetric energy density of 0.446 mW h cm?3 at a current density of 0.5 mA cm?2 and a maximum power density of 44.1 mW cm?3 at a current density of 6.0 mA cm?2 are achieved by the as‐assembled device. What's more, the device also shows excellent mechanical flexibility and little capacitance change after over 5000 charge/discharge cycles at a current density of 0.5 mA cm?2. |
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| Keywords: | flexible asymmetric all‐solid‐state high performance hydrothermal synthesis nickel phosphate nanorods supercapacitor |
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