Integrated gas expansion and activation strategy to prepare shaddock peel-derived nitrogen doped honeycomb carbon for high performance supercapacitor
Integrated gas expansion and activation strategy to prepare shaddock peel-derived nitrogen doped honeycomb carbon for high performance supercapacitor
复制标题
集成气体膨胀和活化策略制备高性能超级电容器用柚皮衍生氮掺杂蜂窝碳
DOI:
10.1007/s10934-022-01278-2
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发表时间:
2022-06
影响因子:
2.6
通讯作者:
Chang-Dai Si
中科院分区:
文献类型:
--
作者:
Shi-Jia Long;Chang-Dai Si
Shaddock peel-derived nitrogen doped honeycomb carbon (NHPC) has been prepared by a facile integrated gas expansion, activation and nitrogen doping strategy using urea and potassium carbonate (K2CO3) as the mixed activating agents. The thermal decomposition of urea to generate ammonia plays a dual role of a nitrogen source and gas expanding agent, while the K2CO3 plays a pore-creating medium. The NHPC exhibits honeycomb-like microstructure feature and possesses a large specific surface area (1438.5 m2 g−1), high nitrogen doping (6.23 wt%) and well-developed mesopores. Consequently, the NHPC used as electrode for supercapacitor exhibits high specific capacitance of 225 F g−1 at 0.25 A g−1 and good rate capability. In addition, the symmetric supercapacitor fabricated with NHPC material in 1 M K2SO4 aqueous electrolyte delivers high energy density of 18 W h kg−1 operated in the wide voltage of 2.0 V and superior cyclability of 97.8% capacity retention after 30,000 cycles.
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