期刊
ELECTROCHIMICA ACTA
卷 201, 期 -, 页码 142-150出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.03.145
关键词
Asymmetric supercapacitor; Phosphates; High energy density; Pseudocapacitance
资金
- National Natural Science Foundation of China [21403099]
- Natural Science Foundation of Gansu Province [145RJZA193]
- State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology [SKLAB02014005]
Nano-sized Ni3P2O8-Co3P2O8 center dot 8H(2)O is synthesized via a facile chemical precipitation method as the active material of supercapacitors. The experiment result expresses the Ni3P2O8-Co3P2O8 center dot 8H(2)O of the Ni/Co molar ratio of 8: 2 exhibits enhanced capacitive behaviors relatively than others, it delivers a highest mass specific capacitance of 1974 F g(-1) at 0.5 A g(-1), which is higher than both Ni3P2O8 and Co3P2O8 center dot 8H(2)O. The sforzato in specific capacitance is on account of the pore structure, uniform particle morphology, and hyperbaric of Ni. An asymmetric supercapacitor is assembled using the Ni3P2O8-Co3P2O8 center dot 8H(2)O and activated carbon (AC) as positive and negative electrode, respectively. It not only sends a large specific capacitance (94 F g(-1)) but also good cycling stability (up to 5000 cycles). The impressive results presented here may be potential applications for high energy density storage systems. (C) 2016 Elsevier Ltd. All rights reserved.
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