کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6466409 | 1422963 | 2017 | 9 صفحه PDF | دانلود رایگان |

- Mesoporous nanoneedle arrays of MnCo2O4.5 are synthesized on Ni foam.
- The MnCo2O4.5 nanoneedle arrays electrode exhibits the prominent electrochemical performances.
- The asymmetric device with high energy storage density and outstand cycling stability is successfully fabricated.
The aligned mesoporous nanoneedle arrays of MnCo2O4.5 (MNA-MnCo2O4.5) are synthesized on Ni foam by using a calcination-process assisted hydrothermal method. Each MnCo2O4.5 nanoneedle features abundant mesopores on the surface. The as-fabricated unique MNA-MnCo2O4.5 exhibits the prominent electrochemical performances as evidenced by the high specific capacity of 517.9 C gâ1 at 3.6 A gâ1, and 98.3% capacity retention after 1000 cycles at a current density of 7.2 A gâ1. An asymmetric MNA-MnCo2O4.5//active carbon supercapacitor is further fabricated to explore the merits of MNA-MnCo2O4.5 electrode, which manifests i) an energy storage density of 40.5 Wh kgâ1 at 376 W kgâ1, ii) a power density of 3.06 kW kgâ1 at 19.3 Wh kgâ1 and iii) an outstanding long-term cycle stability with 7.3% capacity loss after 5000 cycles. These results indicate that the synthesized MNA-MnCo2O4.5 is promising towards the practical application as high-performance supercapacitor electrode in future.
Journal: Chemical Engineering Journal - Volume 315, 1 May 2017, Pages 491-499