Novel FeNi2S4/TMD-based ternary composites for supercapacitor applications

作者：Shen, Jianfeng; Ji, Jin; Dong, Pei; Baines, Robert; Zhang, Zhuqing; Ajayan, Pulickel M.; Ye, Mingxin^*

来源：Journal of Materials Chemistry A, 2016, 4(22): 8844-8850.

DOI：10.1039/c6ta03111k

• IN-SITU GROWTH
• ASYMMETRIC SUPERCAPACITORS
• MICRO-SUPERCAPACITORS
• PERFORMANCE
• NANOSHEETS
• ELECTRODE
• GRAPHENE
• ARRAYS
• NANOCOMPOSITE
• NANOSPHERES

Ternary electrode materials based on graphene, FeNi2S4, and transition metal dichalcogenides (TMDs) were obtained via a one-pot synthesis method. Compared to binary materials, FeNi2S4 graphene (g)-2D-TMD nanocomposites exhibited better performance, which is a direct consequence of their unique ternary structures and the induced synergistic effect among their three components-ultrathin TMD nanosheets, highly conductive graphene networks, and FeNi2S4 nanoparticles. With the fabricated materials, we constructed electrodes to assess the electrochemical performance. The results are promising: the materials exhibited rapid electron and ion transport rates and large electroactive surface areas, testifying to their excellent electrochemical properties. In particular, the FeNi2S4-g-MoSe2 electrode demonstrated a maximum specific capacitance of 1700 F g(-1) at a current density of 2 A g(-1) (8.5 F cm(-2) at a current density of 10 mA cm(-2)) and a capacitance retention of approximately 106% after 4000 cycles at a charge discharge current density of 2 A g(-1). These electrochemical results indicate that the ternary composite, FeNi2S4-g-MoSe2, is a promising candidate electrode material for high-performance supercapacitors.

• 出版日期2016-6-14
• 单位复旦大学