期刊
IONICS
卷 28, 期 3, 页码 1419-1426出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-021-04352-y
关键词
Multi-layered carbon nanosheets; Zinc-ion hybrid capacitor; Anthracene oil
资金
- Scientific Research Startup Funding of Chuzhou University [2020qd51]
- Key Laboratory of Metallurgical Emission Reduction & Resources Recycling (Anhui University of Technology), Ministry of Education [JKF21-02]
- Anhui Provincial National Science Foundation [1808085ME138]
- Natural Science Foundation of the Anhui Provincial Education Department [KJ2019A0075]
This study demonstrates the construction of aqueous zinc-ion hybrid capacitors using multi-layered carbon nanosheets, which exhibit high specific capacity, excellent rate performance, large energy/power density, and outstanding cycle stability. It also indicates the potential of synthesizing new carbon cathode materials from chemical by-products for zinc ion storage.
Zn has attracted widely attention in energy storage systems due to its characteristics of being highly safe, low-price, and environmentally friendly. Besides, the high ionic conductivity of aqueous electrolytes is beneficial for achieving high power output. Herein, the aqueous zinc-ion hybrid capacitors (ZHCs) are constructed by the multi-layered carbon nanosheets (MLCNs), Zn foil, and 1 M ZnSO4 solution as cathode, anode, and electrolyte, respectively. Of which, MLCN is prepared for the first time from a chemical by-product by a confined-tailored strategy of potassium bicarbonate. The MLCN displays well-developed mesoporous structures with high surface area of 1947.2 m(2) g(-1) and abundant cavities, which play a decisive role in enhancing charge storage and ion diffusion kinetics. As cathode for ZHC, the MLCN displays appealing Zn storage capability, such as high specific capacity of 128.7 mAh g(-1) at 0.1 A g(-1), excellent rate performance of 88.1 mA h g(-1) at 20 A g(-1), large energy/power density of 102.1 Wh kg(-1)/16.9 kW kg(-1), and outstanding cycle stability with 1.3% loss after 10,000 cycles. This work will inspire the synthesis of new carbon cathode materials from chemical by-products for Zn ion storage.
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