Bifunctional iron disulfide nanoellipsoids for high energy density supercapacitor and electrocatalytic oxygen evolution applications Electronic supplementary information (ESI) available. See DOI: 10.1039/c8qi01230j

被引:28
作者
Sun, Zhiqin [1 ]
Yang, Xue [1 ]
Lin, Huiming [1 ]
Zhang, Feng [1 ]
Wang, Qian [1 ,2 ]
Qu, Fengyu [1 ,2 ]
机构
[1] Harbin Normal Univ, Key Lab Photochem Biomat & Energy Storage Mat, Coll Chem & Chem Engn, Harbin 150025, Heilongjiang, Peoples R China
[2] Harbin Normal Univ, Lab Photon & Elect Bandgap Mat, Minist Educ, Harbin 150025, Heilongjiang, Peoples R China
基金
黑龙江省自然科学基金; 中国国家自然科学基金;
关键词
METAL-ORGANIC-FRAMEWORK; REDUCED GRAPHENE OXIDE; NICKEL-COBALT SULFIDE; HYDROTHERMAL SYNTHESIS; ASYMMETRIC SUPERCAPACITORS; NEGATIVE ELECTRODE; HYDROGEN EVOLUTION; ASSISTED SYNTHESIS; CHEMICAL-SYNTHESIS; ANODE MATERIAL;
D O I
10.1039/c8qi01230j
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
To solve the problem of low energy density in supercapacitor devices, enhancing the specific capacity of the anode is essential and urgent. FeS2 nanoellipsoids have been prepared using a rapid microwave-assisted method as an anode for supercapacitors. The anode possesses a wide working potential (-1.2 to 0 V), and a high specific capacity (515 C g(-1) at 1 A g(-1)) in 2 M KOH, showing obvious improvement over conventional carbon materials used for supercapacitors. As a consequence, the maximum energy density reached 64 W h kg(-1) at 271.2 W kg(-1) thanks to the high specific capacity of the FeS2 anode, and the asfabricated brand new device was able to retain 91% of its initial capacitance after 5000 cycles. Moreover, the as-prepared FeS2 ellipsoids also exhibit efficient electrocatalytic oxygen evolution in 1 M KOH with an overpotential of 370 mV at 10 mA cm(-2) (vs. RHE). Therefore, the as-prepared FeS2 electrode holds huge potential for use in energy storage and conversion applications in the future.
引用
收藏
页码:659 / 670
页数:12
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