Journal
ELECTROCHIMICA ACTA
Volume 277, Issue -, Pages 41-49Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.04.214
Keywords
Molybdenum nitride; Negative electrode; N-doped carbon; Electrospinning Supercapacitor
Categories
Funding
- National Natural Science Foundation of China [51203071, 51363014, 51463012, 51763014]
- China Postdoctoral Science Foundation [2014M552509, 2015T81064]
- Natural Science Funds of the Gansu Province [1506RJZA098]
- Program for Hongliu Distinguished Young Scholars in Lanzhou University of Technology [J201402]
- Shenyang National Laboratory for Materials Science [18LHPY002]
- State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals [18LHPY002]
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To widen the practical application of supercapacitors in acid electrolyte, carbon/molybdenum nitride (C/MoxN) nanofibers are synthesized via combination of electrospinning method and thermal treatment in mixed gas atmosphere of N-2 and NH3. When the mass fraction of ammonium molybdate of 1.13 wt.% is added in the precursor mixture solution, as-prepared C/MoxN composite shows the nanofibers of about 200 nm diameter with MoxN nanoparticles uniformly embedded in the N-doped carbon substrate, and delivers a specific capacitance of 251 F g(-1). Three types of supercapacitor devices of PANI parallel to C/MoxN, AC parallel to C/MoxN and C/MoxN parallel to C/MoxN are configured in acid electrolyte. The asymmetric supercapacitor of PANIjjC/MoxN shows a maximum energy density of 14.1Wh kg(-1) and power density of 312Wkg(-1), which was larger than those of AC parallel to C/MoxN device (12Wh kg-(1,) and 325Wkg(-1)) and symmetric supercapacitors of C/MoxN parallel to C/MoxN device (4.51Wh kg(-1), and 250Wkg(-1)). The C/MoxN parallel to C/MoxN device exhibits good cycle life of specific capacitance retention of 78.6% at 2 A g(-1) after 15, 000 cycles. (C) 2018 Elsevier Ltd. All rights reserved.
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