High‐Performance Organic–Inorganic Hybrid Conductive Hydrogels for Stretchable Elastic All‐Hydrogel Supercapacitors and Flexible Self‐Powered Integrated Systems

Author:

Cheng Tao1,Liu Zhong‐Ting1,Qu Jie1,Meng Chao‐Fu1,He Ling‐Jun1,Li Lang1,Yang Xuan‐Li1,Cao Yu‐Jie1,Han Kai1,Zhang Yi‐Zhou2,Lai Wen‐Yong1ORCID

Affiliation:

1. State Key Laboratory of Organic Electronics and Information Displays (SKLOEID) Institute of Advanced Materials (IAM) School of Chemistry and Life Sciences Nanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China

2. Institute of Advanced Materials and Flexible Electronics (IAMFE) School of Chemistry and Materials Science Nanjing University of Information Science & Technology Nanjing 210044 China

Abstract

AbstractConductive polymer hydrogels exhibit unique electrical, electrochemical, and mechanical properties, making them highly competitive electrode materials for stretchable high‐capacity energy storage devices for cutting‐edge wearable electronics. However, it remains extremely challenging to simultaneously achieve large mechanical stretchability, high electrical conductivity, and excellent electrochemical properties in conductive polymer hydrogels because introducing soft insulating networks for improving stretchability inevitably deteriorates the connectivity of rigid conductive domain and decreases the conductivity and electrochemical activity. This work proposes a distinct confinement self‐assembly and multiple crosslinking strategy to develop a new type of organic–inorganic hybrid conductive hydrogels with biphase interpenetrating cross‐linked networks. The hydrogels simultaneously exhibit high conductivity (2000 S m−1), large stretchability (200%), and high electrochemical activity, outperforming existing conductive hydrogels. The inherent mechanisms for the unparalleled comprehensive performances are thoroughly investigated. Elastic all‐hydrogel supercapacitors are prepared based on the hydrogels, showing high specific capacitance (212.5 mF cm−2), excellent energy density (18.89 µWh cm−2), and large deformability. Moreover, flexible self‐powered luminescent integrated systems are constructed based on the supercapacitors, which can spontaneously shine anytime and anywhere without extra power. This work provides new insights and feasible avenues for developing high‐performance stretchable electrode materials and energy storage devices for wearable electronics.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Natural Science Foundation of Jiangsu Province

Startup Foundation for Introducing Talent of Nanjing University of Information Science and Technology

Publisher

Wiley

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