期刊
NANO ENERGY
卷 66, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2019.104132
关键词
Intercalator strategy; Layered porous carbon; Co-doping; Zinc-ion hybrid supercapacitor
类别
资金
- National Natural Science Foundation of China [21563029, 21805237]
- Opening Foundation of the State Key Laboratory of Fine Chemicals [KF1805]
- 111 Project [D17007]
- Natural Sciences Foundation of Xinjiang Uygur Autonomous Region [2019D01C075, 2018D01C053]
Zinc-ion hybrid supercapacitors (ZHSs), inheriting the merits from supercapacitors and many batteries, exhibit promise in energy storage technologies. However, they are bottlenecked by the sluggish diffusion of Zn2+, Zn dendrite growth and inadequate cathodes. Herein, newly designed layered B/N co-doped porous carbon (LDC) guided by the intercalator is proposed for the first time as cathode material for high-energy-power ZHSs to efficiently mitigate these issues. Associated with the multiple synergy of short mass/charge transfer pathway, fast kinetics and increased electroactivity endowed by the structurally engineered LDC, the quasi-solid Zn//gelatin/ZnSO4 (gel)//LDC ZHS device exhibits intriguing Zn-storage capabilities, including exceptional energy/power density of 86.8 Wh kg(-1)/12.2 kW kg(-1) in a relatively wide voltage window of 0.2-1.8 V, long service life of 6500 cycles at 5 A g(-1) and low self-discharge. Moreover, smart watch and LED indicator can be driven well by this device. The present results highlight the facile and efficient synthesis of a layered carbon-based cathode material, significantly contributing to the rapid development of eco-friendly and scalable Zn-based hybrid energy devices.
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