Core/shell structure NiCo2O4@MnCo2O4 nanofibers fabricated by different temperatures for high-performance supercapacitors. (7th March 2018)

• Record Type: Journal Article
• Authors: Wang, Qing; Qin, Xuefeng; Jiang, Pengcheng; Dai, Jianfeng; Li, Weixue; Gao, Haoran
• Is Part Of: Materials research express. Volume 5:Number 3(2018)
• Publication Date: 2018-03-07
• Subjects: co-electrospinning -- nanocomposites -- supercapacitors -- NiCo2O4@MnCo2O4; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aab0eb
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: Core/shell structure NiCo2 O4 @MnCo2 O4 nanofibers (NiCo2 O4 @MnCo2 O4 NFs) were prepared by a facile co-electrospinning method and heat treatment. The composites annealed at 500 °C have a complete, continuously obvious core/shell structure, and clear interface of composites with good morphology, while annealed at 600 °C were stacked on each other and were unable to sustain three-dimensional network structures and 700 °C calcination have completely lost one-dimensional structure. The core NiCo2 O4 is about 70 nm in diameter and the MnCo2 O4 shell behaves a thickness about 60 nm. When investigated as an electrode material for supercapacitors, the NiCo2 O4 @MnCo2 O4 NFs annealed at 500 °C exihibited the specific capacitance of 463 F g −1 (0.926 F cm −2 ) at 1 A g −1, higher than that annealed at 600 °C 362 F g −1, 1 A g −1 (0.724 F cm −2, 1 A g −1 ) and 700 °C 283 F g −1, 1 A g −1 (0.566 F cm −2, 1 A g −1 ). These results suggest that core/shell NiCo2 O4 @MnCo2 O4 NFs annealed at 500 °C have formed a good morphology with continuously complete core/shell structure which lead to good properties would be potential electrodes for supercapacitors.