Biomimetic Wood-Confined Hydrogel Ion Channel for Flexible Supercapacitors

21 Pages Posted: 22 Jul 2022

See all articles by Chenxiang Gao

Chenxiang Gao

Northeast Forestry University

Yue Liu

Northeast Forestry University

Jiuzhou Zhang

Northeast Forestry University

Hui Li

Royal Melbourne Institute of Technolog (RMIT University)

Yang Liu

Northeast Forestry University

Jiyou Gu

Northeast Forestry University

Tianyi Ma

Swinburne University of Technology - Centre for Translational Atomaterials

Pengfei Huo

Northeast Forestry University

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Abstract

Hydrogel is a promising electrolyte substrate; however, the dimensional stability and ionic conductivity need to be further improved. To tackle this issue, a flexible poly (acrylic acid-co-acrylamide) [P(AA-co-AM)]-filled wood hydrogel composite electrolyte (WHE) is rationally designed and fabricated. This is the first demonstration that flexible wood as a porous backbone for hydrogels can regulate ion transport pathways to improve ionic conductivity and enhance dimensional stability of hydrogels. Firstly, the wood is delignified. Then the P(AA-co-AM) is uniformly distributed in the low tortuosity pores of wood by an in-situ polymerization reaction. The straight pores of wood confine the transport of electrolyte ions along the shortest path. The regulation effect of wood on ion transport paths makes the ionic conductivity (3.0 × 10 -2 S cm -1 ) of the electrolyte standing among the best of composite polymer electrolyte. The optimized supercapacitor exhibits a specific capacitance of 155.64 F g -1 and an energy density of 7.45 W h kg -1 . It also exhibits good flexibility under bending conditions and can maintain similar electrochemical performance at a wide range of bending angles. This work provides an effective strategy for the efficient use of wood resources and the development of low-cost, environmentally friendly and high-performance hydrogel electrolyte materials.

Keywords: wood hydrogel, composite polymer electrolyte, flexible supercapacitor, high ionic conductivity

Suggested Citation

Gao, Chenxiang and Liu, Yue and Zhang, Jiuzhou and Li, Hui and Liu, Yang and Gu, Jiyou and Ma, Tianyi and Huo, Pengfei, Biomimetic Wood-Confined Hydrogel Ion Channel for Flexible Supercapacitors. Available at SSRN: https://ssrn.com/abstract=4169985 or http://dx.doi.org/10.2139/ssrn.4169985

Chenxiang Gao

Northeast Forestry University ( email )

Harbin
China

Yue Liu

Northeast Forestry University ( email )

Harbin
China

Jiuzhou Zhang

Northeast Forestry University ( email )

Harbin
China

Hui Li

Royal Melbourne Institute of Technolog (RMIT University) ( email )

124 La Trobe Street
Melbourne, 3000
Australia

Yang Liu

Northeast Forestry University ( email )

Harbin
China

Jiyou Gu

Northeast Forestry University ( email )

Harbin
China

Tianyi Ma

Swinburne University of Technology - Centre for Translational Atomaterials ( email )

Hawthorn, Victoria 3122
Australia

Pengfei Huo (Contact Author)

Northeast Forestry University ( email )

Harbin
China

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