Publisher： John Wiley & Sons Inc
E-ISSN： 1861-471x|10|8|1731-1737
ISSN： 1861-4728
Source： CHEMISTRY - AN ASIAN JOURNAL, Vol.10, Iss.8, 2015-08, pp. : 1731-1737
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Abstract
AbstractA simple hydrothermal method has been developed to prepare hexagonal tablet precursors, which are then transformed into porous sodium‐doped Ni2P2O7 hexagonal tablets by a simple calcination method. The obtained samples were evaluated as electrode materials for supercapacitors. Electrochemical measurements show that the electrode based on the porous sodium‐doped Ni2P2O7 hexagonal tablets exhibits a specific capacitance of 557.7 F g−1 at a current density of 1.2 A g−1. Furthermore, the porous sodium‐doped Ni2P2O7 hexagonal tablets were successfully used to construct flexible solid‐state hybrid supercapacitors. The device is highly flexible and achieves a maximum energy density of 23.4 Wh kg−1 and a good cycling stability after 5000 cycles, which confirms that the porous sodium‐doped Ni2P2O7 hexagonal tablets are promising active materials for flexible supercapacitors.
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