Core-shell structured Fe2O3@Fe3C@C nanochains and Ni-Co carbonate hydroxide hybridized microspheres for high-performance battery-type supercapacitor

被引：192
作者：
Dai, Shuge [1 ]
Bai, Yucheng [1 ]
Shen, Weixia [1 ]
Zhang, Sen [1 ]
Hu, Hao [5 ]
Fu, Jianwei [2 ]
Wang, Xinchang [1 ]
Hu, Chenguo [3 ]
Liu, Meilin [4 ]
机构：
[1] Zhengzhou Univ, Sch Phys & Microelect, Key Lab Mat Phys, Minist Educ, Zhengzhou 450052, Peoples R China
[2] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450052, Peoples R China
[3] Chongqing Univ, Dept Appl Phys, Chongqing 400044, Peoples R China
[4] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
[5] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Luoyang 471023, Henan, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2021年 / 482卷 / 482期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
NiCo-CHH microspheres; Fe2O3@Fe3C@C nanochains; In-situ Raman; Battery-type supercapacitors;
D O I：
10.1016/j.jpowsour.2020.228915
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：
Battery-supercapacitor hybrid (BSH) device is one of the most promising candidates for next advanced energy storage systems because it can bridge the performance gap between lithium ion batteries and conventional capacitors. Herein, we report a novel porous core-shell structured Fe2O3@Fe3C@C nanochains and urchin-like Ni-Co carbonate hydroxide hybridized (denoted as NiCo-CHH) microspheres for advanced battery-type supercapacitors. The as-obtained Fe2O3@Fe3C@C anode shows high specific capacity (611 C g(-1)) and good rate capability. The fabricated NiCo-CHH cathode delivers high specific capacity (814 C g(-1)) and excellent cycling stability. When assembled into a battery-type supercapacitor, the NiCo-CHH//Fe2O3@Fe3C@C device delivers a high energy density (95.2 Wh kg(-1)) and excellent cycling stability. Moreover, In situ Raman spectroscopy proves the reversibility of the NiCo-CHH electrode, and the synergistic effects of Ni and Co ions, further revealing its energy storage mechanism. These findings provide a novel insight on high-performance battery-type supercapacitors.
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页数：9
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