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One-Step Scalable Fabrication of Graphene Integrated Micro-Supercapacitors with Remarkable Flexibility and Exceptional Performance Uniformity
Posted:2019-09-14 19:45    Column:2019

X.Y. Shi, F. Zhou, J.X. Peng, R. Wu, Z.-S. Wu*, X. H. Bao

Advanced Functional Materials, 2019, 29, 1902860.

DOI: 10.1002/adfm.201902860 [PDF]

The rapid development of miniature electronics has accelerated the demand for simplified and scalable production of micro-supercapacitors (MSCs), however, the preparation of active materials, patterning microelectrodes and subsequent modular integration of the reported MSCs are normally separated, and involved in multiple complex steps. Herein, a one-step, cost-effective strategy for fast and scalable fabrication of patterning laser-induced graphene (LIG) for all-solid-state planar integrated MSCs (LIG-MSCs), with various form factors of designable shape, exceptional flexibility, performance uniformity, superior modularization, and high-temperature stability has been demonstrated. Notably, using conductive and porous LIG patterns composed of randomly stacked graphene nanosheets simultaneously acting as both microelectrodes and interconnects, the resulting LIG-MSCs represent typical electrical double capacitive behavior, having an impressive areal capacitance of 0.62 mF cm-2, and long-term stability without capacitance degeneration after 10000 cycles. Furthermore, LIG-MSCs display exceptional mechanical flexibility and adjustable voltage and capacitance output through arbitrary arrangement of cells connected in series and in parallel, indicative of exceptional performance customization. Moreover, all-solid-state LIG-MSCs working at ionogel electrolyte exhibit highly stable performance even at high temperature of 100 oC, with 90% capacitance retention over 3000 cycles, suggestive of outstanding reliability. Therefore, our LIG-MSCs offer tremendous opportunities for miniature power source-integrated microelectronics.

Dalian Institute of Chemical Physics, CAS
457 Zhongshan Road Dalian, China 116023
E-mail: wuzs@dicp.ac.cn

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