Details

Autor(en) / Beteiligte

• Wu, Huayu
• Yan, Chenyi
• Xu, Lin
• Xu, Nuo
• Wu, Xiaoyu
• Jiang, Zhouheng
• Zhu, Shoupu
• Diao, Guowang
• Chen, Ming

Titel

Super Flexible Cathode Material with 3D Cross‐Linking System Based on Polyvinyl Alcohol Hydrogel for Boosting Aqueous Zinc Ion Batteries

Ist Teil von

• ChemElectroChem, 2022-08, Vol.9 (15), p.n/a

Ort / Verlag

Weinheim: John Wiley & Sons, Inc

Erscheinungsjahr

2022

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• A flexible hydrogel cathode constructed by polyvinyl alcohol, MnO2 and graphene was successfully prepared through repeated freeze‐thaw method, which formed complex 3D cross‐linking system with hydrogen bonding and inorganic particle reinforcement. The superior mechanical and electrochemical performance were balanced and obtained by controlling the content of MnO2 (30 %) and H2O (10 %) of the total mass, respectively. As a result, this flexible hydrogel cathode delivered a high capacity of 164.2 mA h g−1 at 1 A g−1 and an outstanding cyclic stability after 500 cycles at 1 A g−1. Furthermore, hydrogel matrix and graphene conductive network could effectively prevent volume expansion and pulverization of MnO2 nanoparticles. And the electrochemical kinetic revealed that the main process was capacitive control, which confirmed the excellent ion transport to enhance storage performance of ZIBs. The soft package ZIBs provided stable power supply at different bending angles. Super flexible composite: hydrogel matrix cathode material (HG MnO2/GO) was constructed by polyvinyl alcohol (PVA), MnO2 and GO via repeated freeze‐thaw method for aqueous zinc ion batteries (ZIBs). This hydrogel cathode with reinforcing effect and hydrogen bond exhibited excellent mechanical and electrochemical properties.