期刊
JOURNAL OF ENERGY STORAGE
卷 30, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.est.2020.101505
关键词
Nitrogen-doped graphene; Doped hydrogel; Stretchable supercapacitor; Energy storage; Composite powder
资金
- Academy of Finland [318114]
- Skoltech NGP Program (Skoltech-MIT joint project)
- Russian Foundation for Basic Research [20-03-00804]
- Academy of Finland (AKA) [318114, 318114] Funding Source: Academy of Finland (AKA)
Lightweight and flexible supercapacitors with high volumetric capacitance are vitally required for wearable and portable energy storage devices. We propose an eco-friendly, simple-to-fabricate high performance supercapacitor, which consists of a solid state material based on nitrogen-doped graphene flake electrodes distributed in the NaCl-containing hydrogel electrolyte, achieving a large surface area interface. Stretchability is achieved by sandwiching this structure between two single-walled carbon nanotube film current collectors. The as-prepared quasi-solid material exhibits outstanding volumetric capacitive performance, high energy density and power density values, attaining corresponding values of 806 F cm(-3), 112 mW h cm(-3) and 294 W cm(-3) at 0.3 A g(-1). This superior capacitive behavior is due to the excellent network comprising NaCl-containing hydrogel, N-Graphene powder and carbon nanotube film, offering new strategy for developing of sustainable high-performance supercapacitors.
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