【摘 要】
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Enhancement of supercapacitors (SCs) with high-energy density and high-power density is still a great challenge.In this paper,a facile strategy for in situ anchoring of Co3O4 particles on N doped carbon cloth (pCoNCC) is reported.Due to the interaction of
【机 构】
：
Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials,Department of Applied
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Enhancement of supercapacitors (SCs) with high-energy density and high-power density is still a great challenge.In this paper,a facile strategy for in situ anchoring of Co3O4 particles on N doped carbon cloth (pCoNCC) is reported.Due to the interaction of the doped N and Co3O4,the electrochemical performance improves significantly,reaching 1,940.13 mF·cm-2 at 1 mA·cm-2 and energy density of 172.46 μWh·cm-2 at the power density of 400 μW·cm-2,much larger than that without N doping electrode of 28.5 mF·cm-2.An aqueous symmetric supercapacitor (ASSC) assembled by two pCoNCC electrodes achieves a maximum energy density of 447.42 μWh·cm-2 and a highest power density of 8,000 μW·cm-2.Utilizing such a high-energy storage ASSC,a digital watch and a temperature-humidity detector are powered for nearly 1 and 2 h,respectively.Moreover,the ASSC displays a superb electrochemical stability of 87.7％ retention after 10,000 cycles at 40 mA·cm-2.This work would provide a new sight to enhance active materials performance and be beneficial for the future energy storage and supply systems.
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