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3D self-supported hierarchical NiCo architectures with integrated capacitive performance and enhanced electronic conductivity for supercapacitors

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  • Tang, YanRu
  • Cheng, Baohai

Abstract

3D self-supported hierarchical Ni and Co co-hydroxide architectures are promising electrode materials for supercapacitor application attributed to their prominent properties such as binder-free electrode fabrication process and high power density. However, the intrinsic conductivity of Ni and Co co-hydroxide is poor. How to develop a new type of supercapacitors exhibiting enhanced electronic conductivity and involving pseudocapacitive performance and electric double-layer capacitive performance is still challenging. Herein, we present a facile co-electrodeposition method to fabricate self-standing NixCo2x(OH)y@Ni/ITO monolithic electrode by growing a layer of NixCo2x(OH)y with layered structure on surface of conductive Ni nanotube, which increases specific surface area and prompts fast ion adsorption/de-adsotption (electrochemical double layer capacitance performance) and fast surface redox reactions (pseudo-capacitance performance). With the conductive Ni nanotube as current collector and electronic conductor, the binder-free NixCo2x(OH)y@Ni/ITO electrode exhibits high specific capacitance (92.4 mF cm−2 at 0.1 mA cm−2, the mass of active material per cm−2 is typically in 100 s μg). Moreover, NixCo2x(OH)y@Ni/ITO hybrids display excellent cycling stability with 93.3% capacitance retention after 5000 cycles. The results suggest NixCo2x(OH)y@Ni/ITO nanostructure constructed based on integrated features of pseudocapacitive performance and electric double-layer capacitive performance and enhanced electronic conductivity is expected to be a type of excellent electrode material for supercapacitor.

Suggested Citation

  • Tang, YanRu & Cheng, Baohai, 2016. "3D self-supported hierarchical NiCo architectures with integrated capacitive performance and enhanced electronic conductivity for supercapacitors," Energy, Elsevier, vol. 112(C), pages 755-761.
    • Handle: RePEc:eee:energy:v:112:y:2016:i:c:p:755-761
    DOI: 10.1016/j.energy.2016.06.104
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    References listed on IDEAS

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    1. H. B. Li & M. H. Yu & F. X. Wang & P. Liu & Y. Liang & J. Xiao & C. X. Wang & Y. X. Tong & G. W. Yang, 2013. "Amorphous nickel hydroxide nanospheres with ultrahigh capacitance and energy density as electrochemical pseudocapacitor materials," Nature Communications, Nature, vol. 4(1), pages 1-7, October.
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    Cited by:

    1. Ensafi, Ali A. & Ahmadi, Najmeh & Rezaei, Behzad & Abdolmaleki, Amir & Mahmoudian, Manzar, 2018. "A new quaternary nanohybrid composite electrode for a high-performance supercapacitor," Energy, Elsevier, vol. 164(C), pages 707-721.
    2. Nguyen, Tuyen & Boudard, Michel & João Carmezim, M. & Fátima Montemor, M., 2017. "NixCo1-x(OH)2 nanosheets on carbon nanofoam paper as high areal capacity electrodes for hybrid supercapacitors," Energy, Elsevier, vol. 126(C), pages 208-216.
    3. Lamiel, Charmaine & Nguyen, Van Hoa & Hussain, Iftikhar & Shim, Jae-Jin, 2017. "Enhancement of electrochemical performance of nickel cobalt layered double hydroxide@nickel foam with potassium ferricyanide auxiliary electrolyte," Energy, Elsevier, vol. 140(P1), pages 901-911.
    4. Iqbal, Muhammad Faisal & Ashiq, Muhammad Naeem & Hassan, Mahmood-Ul & Nawaz, Rahat & Masood, Aneeqa & Razaq, Aamir, 2018. "Excellent electrochemical behavior of graphene oxide based aluminum sulfide nanowalls for supercapacitor applications," Energy, Elsevier, vol. 159(C), pages 151-159.
    5. Xu, Le & Zhao, Yan & Lian, Jiabiao & Xu, Yuanguo & Bao, Jian & Qiu, Jingxia & Xu, Li & Xu, Hui & Hua, Mingqing & Li, Huaming, 2017. "Morphology controlled preparation of ZnCo2O4 nanostructures for asymmetric supercapacitor with ultrahigh energy density," Energy, Elsevier, vol. 123(C), pages 296-304.

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