Reversible self-discharge behavior and its intrinsic mechanism in supercapacitors based on bilayer heterogeneous hydrogel electrolytes
- 1Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University Shanghai 200092 P. R. China
Abstract
Rapid self-discharge is a major challenge for the widespread application of supercapacitors. They are limited by their intrinsic energy storage mechanisms and structures, and it is difficult to suppress supercapacitor self-discharge through modification of the electrode or electrolyte materials. Herein, we discover a reversible self-discharge behavior in supercapacitors based on bilayer heterogeneous hydrogel electrolytes with different water contents. For the hydrogel electrolytes with high water contents (≥73 wt%), the self-discharge time of the supercapacitor when the electrode on the polycation side is positively charged is longer than that when the electrode on the polycation side is negatively charged. In contrast, for the hydrogel electrolytes with low water contents (≤54 wt%), the self-discharge time of the supercapacitor when the electrode on the polycation side is negatively charged is longer than that when the electrode on the polycation side is positively charged. The experimental and simulation results reveal that the reversible self-discharge behavior in this supercapacitor is governed by the competing effects of the built-in electric field at the interface between the two hydrogel electrolytes and the electrode/electrolyte interfaces. This reversible self-discharge behavior is also found in supercapacitors based on pseudocapacitive materials, which can be exploited to regulate the self-discharge of high-performance flexible supercapacitors.
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BibTeX
@article{yan2026reversible,
title = {{Reversible self-discharge behavior and its intrinsic mechanism in supercapacitors based on bilayer heterogeneous hydrogel electrolytes}},
author = {Zefeng Yan and Keyi Dong and Weiyang Tang and Quanhu Sun and Jiaxin Yang and Yan Tan and Yu Wang and Tian Lv and Tao Chen},
journal = {Chemical Science},
year = {2026},
month = sep,
doi = {10.1039/d6sc06329b},
url = {https://doi.org/10.1039/d6sc06329b},
note = {CC BY-NC 3.0},
}
RIS
TY - JOUR
TI - Reversible self-discharge behavior and its intrinsic mechanism in supercapacitors based on bilayer heterogeneous hydrogel electrolytes
AU - Zefeng Yan
AU - Keyi Dong
AU - Weiyang Tang
AU - Quanhu Sun
AU - Jiaxin Yang
AU - Yan Tan
AU - Yu Wang
AU - Tian Lv
AU - Tao Chen
PY - 2026
DA - 2026/09/01
JO - Chemical Science
DO - 10.1039/d6sc06329b
UR - https://doi.org/10.1039/d6sc06329b
AB - Rapid self-discharge is a major challenge for the widespread application of supercapacitors. They are limited by their intrinsic energy storage mechanisms and structures, and it is difficult to suppress supercapacitor self-discharge through modification of the electrode or electrolyte materials. Herein, we discover a reversible self-discharge behavior in supercapacitors based on bilayer heterogeneous hydrogel electrolytes with different water contents. For the hydrogel electrolytes with high water contents (≥73 wt%), the self-discharge time of the supercapacitor when the electrode on the polycation side is positively charged is longer than that when the electrode on the polycation side is negatively charged. In contrast, for the hydrogel electrolytes with low water contents (≤54 wt%), the self-discharge time of the supercapacitor when the electrode on the polycation side is negatively charged is longer than that when the electrode on the polycation side is positively charged. The experimental and simulation results reveal that the reversible self-discharge behavior in this supercapacitor is governed by the competing effects of the built-in electric field at the interface between the two hydrogel electrolytes and the electrode/electrolyte interfaces. This reversible self-discharge behavior is also found in supercapacitors based on pseudocapacitive materials, which can be exploited to regulate the self-discharge of high-performance flexible supercapacitors.
SN - 2041-6520
SN - 2041-6539
ER -