Journal
NANO-MICRO LETTERS
Volume 11, Issue 1, Pages -Publisher
SHANGHAI JIAO TONG UNIV PRESS
DOI: 10.1007/s40820-019-0280-2
Keywords
3D printing; Lattices; Graphene; Supercapacitor; Porous structure; Stereolithography
Funding
- Research Grants Council of the Hong Kong Special Administrative Region of China [CityU11216515]
- City University of Hong Kong [7005070, 9667153]
- Shenzhen Science and Technology Innovation Committee [JCYJ20170818103206501]
- Natural Science Basic Research Plan in Shaanxi Province of China [2017JM5003]
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3D printing-based supercapacitors have been extensively explored, yet the rigid rheological requirement for corresponding ink preparation significantly limits the manufacturing of true 3D architecture in achieving superior energy storage. We proposed the stereolithographic technique to fabricate the metallic composite lattices with octet-truss arrangement by using electroless plating and engineering the 3D hierarchically porous graphene onto the scaffolds to build the hierarchically cellular lattices in quasi-solid supercapacitor application. The supercapacitor device that is composed of composite lattices span several pore size orders from nm to mm holds promising behavior on the areal capacitance (57.75 mF cm(-2)), rate capability (70% retention, 2-40 mA cm(-2)), and long lifespan (96% after 5000 cycles), as well as superior energy density of 0.008 m Wh cm(-2), which are comparable to the state-of-the-art carbon-based supercapacitor. By synergistically combining this facile stereolithographic 3D printing technology with the hierarchically porous graphene architecture, we provide a novel route of manufacturing energy storage device as well as new insight into building other high-performance functional electronics.
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