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Porous NiCoP nanowalls as promising electrode with high-area and mass capacitance for supercapacitors

  • Xiaomeng Zhang (张晓萌)
  • Danni Su (苏丹妮)
  • Aiping Wu (吴爱平)
  • Haijing Yan (闫海静)
  • Xiuwen Wang (王秀文)
  • Dongxu Wang (王东旭)
  • Lei Wang (王蕾)
  • Chungui Tian (田春贵)Email author
  • Li Sun (孙立)
  • Honggang Fu (付宏刚)Email author
Articles
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Abstract

The design of the electrode with high-area and mass capacitance is important for the practical application of supercapacitors. Here, we fabricated the porous NiCoP nanowalls supported by Ni foam (NiCo-P/NF) for supercapacitors with win-win high-area and mass capacitance. The NiCoOH nanowall precursor was prepared by controlling the deposition rate of Ni2+ and Co2+ on NF through a sodium acetate-assisted (floride-free) process. After the phosphorization, the NiCo-P nanowalls formed with high loading about 8.6 mg cm-2 on NF. The electrode combined several advantages favorable for energy storage: the plentiful pores beneficial for ion transport, the nanowalls for easy accommodation of electrolyte, good conductivity of NiCo-P for easy transport of electrons. As expected, the NiCo-P/NF exhibited a high specific mass capacitance (1,861 F g-1 at 1 A g-1, 1,070 F g-1 at 10 A g-1), and high area capacitance (17.31 F cm-2 at 5 mA cm-2 and 10 F cm-2 at 100 mA cm-2). The asymmetric supercapacitor (ASC) composed of NiCo-P/NF positive electrode coupled with commercial active carbon negative electrode exhibited a high energy density of 44.9 W h kg-1 at a power density of 750 W kg-1. The ASC can easily drive fans, electronic watch and LED lamps, implying their potential for the practical application.

Keywords

porous nanowalls bimetallic phosphide supercapacitor floride-free synthesis capacitance 

多孔NiCoP纳米壁用作具有大面积和高质量电容超级电容器有前景电极

摘要

设计同时具有大面积和高质量电容的电极对于超级电容器 的实际应用非常重要. 本文, 我们将多孔NiCoP纳米围墙置于Ni泡 沫(NF)上得到(NiCo-P/NF)电极, 以该电极制备的超级电容器具有 高的面积电容和和质量电容. 首先通过NaAc辅助(不含氟)工艺控 制Ni2+和Co2+在NF上的沉积速率制备NiCoOH纳米围墙母体. 可控 磷化后, 在NF上形成具有约8.6 mg cm−2的高负载量的NiCo-P纳米 围墙. 该电极具有以下特点: 有利于离子传输的丰富孔隙; 易于容纳 电解质的纳米围墙; NiCo-P易于传输电子的良好导电性. NiCo-P/NF表现出高比质量电容(在1 A g−1时为1861 F g−1, 在10 A g−1时为 1070 F g−1), 并且具有大的面积电容(在5 mA cm−2 时为 17.31 F cm−2, 在100 mA cm−2时为10 F cm−2). 由NiCo-P/NF正极与 商业活性炭负极组成的非对称超级电容器(ASC)在功率密度为 750 W kg−1时表现出44.9 W h kg−1的高能量密度. ASC可以轻松驱 动风扇、电子表和LED灯, 表明其具有实际应用的潜力.

Notes

Acknowledgements

We gratefully acknowledge the support from the National Natural Science Foundation of China (21571054, 21631004, 21805073 and 21771059), the Natural Science Foundation of Heilongjiang Province (QC2018013), and the basic research fund of Heilongjiang University in Heilongjiang Province (RCYJTD201801).

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Xiaomeng Zhang (张晓萌)
    • 1
  • Danni Su (苏丹妮)
    • 1
  • Aiping Wu (吴爱平)
    • 1
  • Haijing Yan (闫海静)
    • 1
  • Xiuwen Wang (王秀文)
    • 1
  • Dongxu Wang (王东旭)
    • 1
  • Lei Wang (王蕾)
    • 1
  • Chungui Tian (田春贵)
    • 1
    Email author
  • Li Sun (孙立)
    • 1
  • Honggang Fu (付宏刚)
    • 1
    Email author
  1. 1.Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of ChinaHeilongjiang UniversityHarbinChina

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