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Nano Research

Article Title

A facile strategy of in-situ anchoring of Co3O4 on N doped carbon cloth for an ultrahigh electrochemical performance

Authors

Junlin Lu, Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, Department of Applied Physics, Chongqing University, Chongqing 400044, China
Jien Li, Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, Department of Applied Physics, Chongqing University, Chongqing 400044, China
Jing Wan, Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, Department of Applied Physics, Chongqing University, Chongqing 400044, China
Xiangyu Han, Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, Department of Applied Physics, Chongqing University, Chongqing 400044, China
Peiyuan Ji, Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, Department of Applied Physics, Chongqing University, Chongqing 400044, China
Shuang Luo, Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, Department of Applied Physics, Chongqing University, Chongqing 400044, China
Mingxin Gu, Key Laboratory of Multi-Scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
Dapeng Wei, Key Laboratory of Multi-Scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, ChinaFollow
Chenguo Hu, Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, Department of Applied Physics, Chongqing University, Chongqing 400044, ChinaFollow

Keywords

Co3O4, N doping, carbon cloth, supercapacitor

Abstract

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.

Publisher

Tsinghua University Press

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