期刊
ADVANCED MATERIALS
卷 30, 期 21, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201707025
关键词
elastomeric scaffold-like folding; energy storage; foldable supercapacitors; porous graphene films
类别
资金
- National Natural Science Foundation of China [51403016, 51773008, 51533001, 51521062]
- National Key Research and Development Program of China [2016YFC0801302]
- USA National Science Foundation [1640340, 1510828]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1510828] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Industrial Innovation & Partnersh [1640340] Funding Source: National Science Foundation
The development of fully foldable energy storage devices is a major science and engineering challenge, but one that must be overcome if next-generation foldable or wearable electronic devices are to be realized. To overcome this challenge, it is necessary to develop new electrically conductive materials that exhibit superflexibility and can be folded or crumpled without plastic deformation or damage. Herein, a graphene film with engineered microvoids is prepared by reduction (under confinement) of its precursor graphene oxide film. The resultant porous graphene film can be single folded, double folded, and even crumpled, but springs back to its original shape without yielding or plastic deformation akin to an elastomeric scaffold after the applied stress is removed. Even after thermal annealing at approximate to 1300 degrees C, the folding performance of the porous graphene film is not compromised and the thermally annealed film exhibits complete foldability even in liquid nitrogen. A solid-state foldable supercapacitor is demonstrated with the porous graphene film as the device electrode. The capacitance performance is nearly identical after 2000 cycles of single-folding followed by another 2000 cycles of double folding.
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