A flexible and self-healing hydrogel electrolyte for smart supercapacitor
By Hui Peng, Yaya Lv, Ganggang Wei, Jiezi Zhou, Xiaojie Gao, K. Sun, Guofu Ma, Z. Lei. Journal of Power Sources, 2019
158 citations recorded by the source corpus.
Abstract Although the hydrogel electrolytes for flexible energy-storage device have made great progress, it still remains a huge challenge to assemble a smart supercapacitor with high ionic conductivity and excellent self-healing when suffering physical damage. Herein, a novel self-healing hydrogel electrolyte (B-PVA/KCl/GO) is designed and prepared through graphite oxide (GO) doped into a diol-borate ester bonding cross-linked poly(vinyl alcohol) network. It is found that the moderate amount of GO-doped into hydrogel (2.3 wt% GO, 47.5 mS/cm) is obviously improved ionic conductivity compared with bare B-PVA/KCl hydrogel (32.6 mS/cm). Interestingly, the B-PVA/KCl/GO hydrogel electrolyte exhibits excellent self-healing capability that can repair its original configuration with 5 min when it is cut. Moreover, the activated carbon-based supercapacitor with B-PVA/KCl/GO hydrogel electrolyte delivers high specific capacitance of 156 F g−1 at 0.3 A g−1 and can also restore its capacitive performances via 7 times healing cycles without external stimulus. The presented work provides a new strategy to construct a flexible and self-healing hydrogel to apply for wearable electronics, smart apparels or flexible robots.
Subfields: Biomedical Engineering, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/aecd9dfd3ac0482a88898ed93fb73cd944fe4c18
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Citations in the corpus
- Fundamental Concepts of Hydrogels: Synthesis, Properties, and Their Applications (2020, background): “3 A/g and could store the electrochemical p rform nce even after the s venth cycle [202].”