All-solid-state high performance asymmetric supercapacitors based on novel MnS nanocrystal and activated carbon materials

被引:121
作者
Chen, Teng [1 ]
Tang, Yongfu [1 ]
Qiao, Yuqing [1 ]
Liu, Zhangyu [1 ]
Guo, Wenfeng [1 ]
Song, Jianzheng [1 ]
Mu, Shichun [2 ]
Yu, Shengxue [1 ]
Zhao, Yufeng [1 ]
Gao, Faming [1 ]
机构
[1] Yanshan Univ, Coll Environm & Chem Engn, Key Lab Appl Chem, Qinhuangdao 066004, Peoples R China
[2] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
基金
中国国家自然科学基金;
关键词
HIERARCHICAL POROUS CARBON; MANGANESE SULFIDE NANOCRYSTALS; CATALYTIC GRAPHITIZATION; GRAPHENE; ENERGY; OXIDE; ELECTRODES; STORAGE; CAPACITANCE; MECHANISMS;
D O I
10.1038/srep23289
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
All-solid-state high-performance asymmetric supercapacitors (ASCs) are fabricated using gamma-MnS as positive electrode and porous eggplant derived activated carbon (EDAC) as negative electrode with saturated potassium hydroxide agar gel as the solid electrolyte. The laminar wurtzite nanostructure of gamma-MnS facilitates the insertion of hydroxyl ions into the interlayer space, and the manganese sulfide nanowire offers electronic transportation channels. The size-uniform porous nanostructure of EDAC provides a continuous electron pathway as well as facilitates short ionic transportation pathways. Due to these special nanostructures of both the MnS and the EDAC, they exhibited a specific capacitance of 573.9 and 396 F g(-1) at 0.5 A g(-1), respectively. The optimized MnS//EDAC asymmetric supercapacitor shows a superior performance with specific capacitance of 110.4 F g(-1) and 89.87% capacitance retention after 5000 cycles, a high energy density of 37.6 Wh kg(-1) at a power density of 181.2 W kg(-1) and remains 24.9 Wh kg(-1) even at 5976 W kg(-1). Impressively, such two assembled all-solid-state cells in series can light up a red LED indicator for 15 minutes after fully charged. These impressive results make these pollution-free materials promising for practical applications in solid aqueous electrolyte-based ASCs.
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页数:9
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