Synthesis of high-performance Mo2S3/NiS2-RGO anode materials and its applications in sodium-ion batteries and sodium-ion capacitors

被引:14
作者
Liu, Jian [1 ]
Xu, Ying-Ge [1 ]
Kong, Ling-Bin [1 ,2 ]
机构
[1] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
[2] Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China
基金
中国国家自然科学基金;
关键词
Mo2S3; NiS2-RGO composites; Sodium-ion capacitors (SICs); Sodium-ion batteries (SIBs); LITHIUM-ION; CARBON; STORAGE; NANOPARTICLES; COMPOSITE; ELECTRODE; NANORODS; GROWTH; ARRAYS;
D O I
10.1007/s11581-020-03573-x
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Herein, molybdenum trisulfide/nickel disulfide-reduced graphene oxide (Mo2S3/NiS2-RGO) composites as anode material for sodium-ion batteries (SIBs) and sodium-ion capacitors (SICs) were synthesized by one-step facile hydrothermal method. Through electron microscopy analysis, it could be observed that the Mo2S3/NiS2 nano-rods and nano-balls were dispersed uniformly over the two-dimensional RGO sheets. When tested as an anode material, Mo2S3/NiS2-RGO showed a considerable reversible capacity of 653.1 mA h g(-1) at 100 mA g(-1) after 50 cycles and capacity retention of 197.5 mA h g(-1) at 5000 mA g(-1) after 226 cycles. The sodium storage mechanism of Mo2S3/NiS2-RGO was explained by ex situ XPS. Furthermore, as-fabricated SICs delivered an excellent specific energy of 182.7 W h kg(-1) (at 1120 W kg(-1)), and SIBs exhibited the discharge capacities of 85 mA h g(-1) at 2 C. Overall, the superior electrochemical performances of Mo2S3/NiS2-RGO demonstrated that it was a promising anode materials to construct high-performance full cell.
引用
收藏
页码:4499 / 4510
页数:12
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