Support-induced morphology and content tailored NiCo2O4 nanostructures on temperature-dependent carbon nanofibers with enhanced pseudocapacitive performance

Yang, Ying; Zeng, Dehong; Gu, Lin; Liu, Baijun; Guo, Fangmin; Ren, Yang; Hao, Shijie

doi:10.1016/j.electacta.2018.08.026

Title: Support-induced morphology and content tailored NiCo₂O₄ nanostructures on temperature-dependent carbon nanofibers with enhanced pseudocapacitive performance

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Abstract

Direct anchorage of metal oxides on carbon nanofibers is challenging, and simultaneous modulation of morphology, content and thus pseudocapacitance of anchored metal oxides has never been achieved. In this paper, we report direct anchorage of NiCo₂O₄ nanostructures with tailored morphology, content and pseudocapacitance, on temperature-dependent carbon nanofibers (CNEs), which are derived from zinctrimesic acid fibers at a temperature no more than 600 degrees C. The temperature-dependent CNEs, including CNF-390, CNF-450 and CNF-600, were first investigated by SEM, TG, FT-IR, XPS and Boehm titration studies. It is found that their textural property, thermal stability and surface functionality vary depending on pyrolysis temperature. As a result, the morphology, content and thus the pseudocapacitance of anchored NiCo₂O₄ nanostructures are also temperature-dependent. It is revealed that as increasing the pyrolysis temperature, the shape of NiCo₂O₄ is transformed from embedded nanoparticles to exposed nanosheets while its content decreases from 95 to 55 wt%. The resultant NiCo₂O₄/CNF-450, bearing highly dispersed nanosheets and optimized NiCo₂O₄ content (72.6%), exhibits the best capacitive performance with a large specific capacitance of 870 F g^-1 at a scan rate of 1 mV s^-1, and a high energy density of 39.3 Wh kg^-1 in the case of power density of 300 Wmore »« less

Authors:

Yang, Ying ^[1]; Zeng, Dehong ^[1]; Gu, Lin ^[1]; Liu, Baijun ^[1]; Guo, Fangmin ^[2]; Ren, Yang ^[3]; Hao, Shijie ^[1]

China University of Petroleum, Changping, Beijing (China). State Key Laboratory of Heavy Oil Processing
China University of Petroleum, Changping, Beijing (China). State Key Laboratory of Heavy Oil Processing; Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division
Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division

Publication Date:: Thu Aug 09 00:00:00 EDT 2018

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC)

OSTI Identifier:: 1488547

Alternate Identifier(s):: OSTI ID: 1702299

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Electrochimica Acta

Additional Journal Information:: Journal Volume: 286; Journal Issue: C; Journal ID: ISSN 0013-4686

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; NiCo2O4; carbon nanofiber; content; morphology; pseudocapacitance

Citation Formats


                    Yang, Ying, Zeng, Dehong, Gu, Lin, Liu, Baijun, Guo, Fangmin, Ren, Yang, and Hao, Shijie. Support-induced morphology and content tailored NiCo2O4 nanostructures on temperature-dependent carbon nanofibers with enhanced pseudocapacitive performance.  United States: N. p., 2018. 
Web.  doi:10.1016/j.electacta.2018.08.026.

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                    Yang, Ying, Zeng, Dehong, Gu, Lin, Liu, Baijun, Guo, Fangmin, Ren, Yang, & Hao, Shijie. Support-induced morphology and content tailored NiCo2O4 nanostructures on temperature-dependent carbon nanofibers with enhanced pseudocapacitive performance.  United States.  https://doi.org/10.1016/j.electacta.2018.08.026

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                    Yang, Ying, Zeng, Dehong, Gu, Lin, Liu, Baijun, Guo, Fangmin, Ren, Yang, and Hao, Shijie. Thu .  
"Support-induced morphology and content tailored NiCo2O4 nanostructures on temperature-dependent carbon nanofibers with enhanced pseudocapacitive performance".  United States.  https://doi.org/10.1016/j.electacta.2018.08.026.  https://www.osti.gov/servlets/purl/1488547.

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@article{osti_1488547,

  title        = {Support-induced morphology and content tailored NiCo2O4 nanostructures on temperature-dependent carbon nanofibers with enhanced pseudocapacitive performance},

  author       = {Yang, Ying and Zeng, Dehong and Gu, Lin and Liu, Baijun and Guo, Fangmin and Ren, Yang and Hao, Shijie},

  abstractNote = {Direct anchorage of metal oxides on carbon nanofibers is challenging, and simultaneous modulation of morphology, content and thus pseudocapacitance of anchored metal oxides has never been achieved. In this paper, we report direct anchorage of NiCo2O4 nanostructures with tailored morphology, content and pseudocapacitance, on temperature-dependent carbon nanofibers (CNEs), which are derived from zinctrimesic acid fibers at a temperature no more than 600 degrees C. The temperature-dependent CNEs, including CNF-390, CNF-450 and CNF-600, were first investigated by SEM, TG, FT-IR, XPS and Boehm titration studies. It is found that their textural property, thermal stability and surface functionality vary depending on pyrolysis temperature. As a result, the morphology, content and thus the pseudocapacitance of anchored NiCo2O4 nanostructures are also temperature-dependent. It is revealed that as increasing the pyrolysis temperature, the shape of NiCo2O4 is transformed from embedded nanoparticles to exposed nanosheets while its content decreases from 95 to 55 wt%. The resultant NiCo2O4/CNF-450, bearing highly dispersed nanosheets and optimized NiCo2O4 content (72.6%), exhibits the best capacitive performance with a large specific capacitance of 870 F g-1 at a scan rate of 1 mV s-1, and a high energy density of 39.3 Wh kg-1 in the case of power density of 300 W kg-1. The elaborately fabricated NiCo2O4/CNF-450 also shows excellent charge-discharge stability (with the capacity retention ratio of 85.7% after 5000 cycles). The improved accessibility for more pseudocapacitive NiCo2O4 nanosheets, as well as the strong interaction between NiCo2O4 and carbon nanofiber, should be responsible for the enhanced capacitive performance of NiCo2O4/CNF-450. Lastly, this research also provides the concept of support-induced modulation of property and pseudocapacitive performance of anchored metal oxides.},

  doi          = {10.1016/j.electacta.2018.08.026},

  journal      = {Electrochimica Acta},

  number       = C,

  volume       = 286,

  place        = {United States},

  year         = {Thu Aug 09 00:00:00 EDT 2018},

  month        = {Thu Aug 09 00:00:00 EDT 2018}

}

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Title: Support-induced morphology and content tailored NiCo2O4 nanostructures on temperature-dependent carbon nanofibers with enhanced pseudocapacitive performance

Abstract

Citation Formats

Title: Support-induced morphology and content tailored NiCo₂O₄ nanostructures on temperature-dependent carbon nanofibers with enhanced pseudocapacitive performance