Journal
JOURNAL OF ENERGY STORAGE
Volume 40, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.est.2021.102698
Keywords
Hierarchical porous carbon; Pyrophosphate; NiCo; Supercapacitor; Bacterial cellulose
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Funding
- Sichuan University [YJ202103]
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The electrode for hybrid supercapacitors, NiCo pyrophosphate/nitrogen doped carbon compound, shows high specific capacitance and good cycle stability. After 10000 cycles, the specific capacitance retention of the capacitor remains at 83.7%.
Hybrid supercapacitors, due to the synergistic effect of each composition, show higher specific capacitance and improved cycle stability compared with most traditional supercapacitors. In this work, multicomponent compound NiCo pyrophosphate/nitrogen doped carbon (NiCoPN/C) is elaborately designed and applied as the electrode for hybrid supercapacitors. The obtained sample possesses a hierarchically porous structure with surface area of up to 341.7 m(2) g(-1). In the electrochemical test, the sample gives a specific capacitance of 1240 F g(-1) at the current density of 1 A g(-1). The asymmetric supercapacitor NiCoPN/C-5//AC exhibits a high specific energy of 44.68 W h kg(-1) when specific power is 715 W kg(-1). After 10000 cycles, the specific capacitance retention of the capacitor remains at 83.7%.
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