Arbitrary-Shaped Graphene-Based Planar Sandwich Supercapacitors on One Substrate with Enhanced Flexibility and Integration.
The emerging smart power source-unitized electronics represent an utmost innovative paradigm requiring dramatic alteration from materials to device assembly and integration. However, traditional power sources with huge bottlenecks on the design and performance cannot keep pace with the revolutionized progress of shape-confirmable integrated circuits. Here, we demonstrate a versatile printable technology to fabricate arbitrary-shaped, printable graphene-based planar sandwich supercapacitors based on the layer-structured film of electrochemically exfoliated graphene as two electrodes and nanosized graphene oxide (lateral size of 100 nm) as a separator on one substrate. These monolithic planar supercapacitors not only possess arbitrary shapes, e.g., rectangle, hollow-square, "A" letter, "1" and "2" numbers, circle, and junction-wire shape, but also exhibit outstanding performance (∼280 F cm-3), excellent flexibility (no capacitance degradation under different bending states), and applicable scalability, which are far beyond those achieved by conventional technologies. More notably, such planar supercapacitors with superior integration can be readily interconnected in parallel and series, without use of metal interconnects and contacts, to modulate the output current and voltage of modular power sources for designable integrated circuits in various shapes and sizes.
University of Chinese Academy of Sciences , 19 A Yuquan Rd, Shijingshan District, Beijing 100049, China.
Shuanghao
S
Zheng
State Key Laboratory for Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , 422 Siming South Road, Xiamen 361005, China.
Xingyan
X
Tang
Zhong-Shuai
0000-0003-1851-4803
ZS
Wu
State Key Laboratory for Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , 422 Siming South Road, Xiamen 361005, China.
Yuan-Zhi
YZ
Tan
University of Chinese Academy of Sciences , 19 A Yuquan Rd, Shijingshan District, Beijing 100049, China.
Sen
S
Wang
Chenglin
C
Sun
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , 72 Wenhua Road, Shenyang 110016, P. R. China.|Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University , 1001 Xueyuan Road, Shenzhen 518055, P. R. China.
Hui-Ming
HM
Cheng
Xinhe
0000-0001-9404-6429
X
Bao
arbitrary shape; flexible; graphene; integration; planar supercapacitors; printable