Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6602738 | Electrochimica Acta | 2018 | 9 Pages |
Abstract
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 N2 and NH3. When the mass fraction of ammonium molybdate of 1.13â¯wt.% is added in the precursor mixture solution, as-prepared C/MoxN composite shows the nanofibers of about 200â¯nm diameter with MoxN nanoparticles uniformly embedded in the N-doped carbon substrate, and delivers a specific capacitance of 251â¯Fâ¯gâ1. Three types of supercapacitor devices of PANI||C/MoxN, AC||C/MoxN and C/MoxN||C/MoxN are configured in acid electrolyte. The asymmetric supercapacitor of PANI||C/MoxN shows a maximum energy density of 14.1â¯Wh kgâ1 and power density of 312â¯Wâ¯kgâ1, which was larger than those of AC||C/MoxN device (12â¯Wh kgâ1, and 325â¯Wâ¯kgâ1) and symmetric supercapacitors of C/MoxN||C/MoxN device (4.51â¯Wh kgâ1, and 250â¯Wâ¯kgâ1). The C/MoxN||C/MoxN device exhibits good cycle life of specific capacitance retention of 78.6% at 2â¯Aâ¯gâ1 after 15, 000 cycles.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Yongtao Tan, Lei Meng, Yanqin Wang, Wenju Dong, Lingbin Kong, Long Kang, Fen Ran,