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A Hierarchically Tailored Wrinkled Three-Dimensional Foam for Enhanced Elastic Supercapacitor Electrodes

Authors
Jang, SiyeonMin, HyeonghoCho, Sung BeomKim, Hyeon WooSon, WonkyeongChoi, ChangsoonChun, SungwooPang, Changhyun
Issue Date
25-8월-2021
Publisher
AMER CHEMICAL SOC
Keywords
3D foam; nanostructures; polymeric foam; supercapacitor; wrinkles
Citation
NANO LETTERS, v.21, no.16, pp.7079 - 7085
Indexed
SCIE
SCOPUS
Journal Title
NANO LETTERS
Volume
21
Number
16
Start Page
7079
End Page
7085
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/136807
DOI
10.1021/acs.nanolett.1c01384
ISSN
1530-6984
Abstract
Recently, three-dimensional (3D) porous foams have been studied, but further improvement in nanoscale surface area and stretchability is required for electronic and energy applications. Herein, a general strategy is reported to form a tailored wrinkling structure on strut surfaces inside a 3D polydimethylsiloxane (PDMS) polymeric foam. Controlled wrinkles are created on the struts of 3D foam through an oxygen plasma treatment to form a bilayer surface of PDMS on uniaxially prestretched 3D PDMS foam, followed by relaxation. After plasma treatment for 1 h and prestretching of 40%, the wrinkled 3D foam greatly improves specific surface area and stretchability by over 60% and 75%, respectively, compared with the pristine 3D PDMS foam. To prove its applicability with improved performances, supercapacitors are prepared by coating a conductive material on the wrinkled 3D foam. The resulting supercapacitors exhibit an increased storage capacity (8.3 times larger), maintaining storage capacity well under stretching up to 50%.
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