title: Direct laser-patterned micro-supercapacitors from paintable MoS2 films.
abstract: Micrometer-sized electrochemical capacitors have recently attracted attention due to their possible applications in micro-electronic devices. Here, a new approach to large-scale fabrication of high-capacitance, two-dimensional MoS2 film-based micro-supercapacitors is demonstrated via simple and low-cost spray painting of MoS2 nanosheets on Si/SiO2 chip and subsequent laser patterning. The obtained micro-supercapacitors are well defined by ten interdigitated electrodes (five electrodes per polarity) with 4.5 mm length, 820 μm wide for each electrode, 200 μm spacing between two electrodes and the thickness of electrode is ∼0.45 μm. The optimum MoS2 -based micro-supercapacitor exhibits excellent electrochemical performance for energy storage with aqueous electrolytes, with a high area capacitance of 8 mF cm(-2) (volumetric capacitance of 178 F cm(-3) ) and excellent cyclic performance, superior to reported graphene-based micro-supercapacitors. This strategy could provide a good opportunity to develop various micro-/nanosized energy storage devices to satisfy the requirements of portable, flexible, and transparent micro-electronic devices.
authors.affiliation: Department of Mechanical, Engineering & Materials Science, Rice University, Houston, Texas 77005, USA; School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China.
authors.forename: Liujun
authors.initials: L
authors.lastname: Cao
authors.forename: Shubin
authors.initials: S
authors.lastname: Yang
authors.forename: Wei
authors.initials: W
authors.lastname: Gao
authors.forename: Zheng
authors.initials: Z
authors.lastname: Liu
authors.forename: Yongji
authors.initials: Y
authors.lastname: Gong
authors.forename: Lulu
authors.initials: L
authors.lastname: Ma
authors.forename: Gang
authors.initials: G
authors.lastname: Shi
authors.forename: Sidong
authors.initials: S
authors.lastname: Lei
authors.forename: Yunhuai
authors.initials: Y
authors.lastname: Zhang
authors.forename: Shengtao
authors.initials: S
authors.lastname: Zhang
authors.forename: Robert
authors.initials: R
authors.lastname: Vajtai
authors.forename: Pulickel M
authors.initials: PM
authors.lastname: Ajayan
keywords: MoS2; laser patterning; micro-supercapacitors; nanosheets; paintable films