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Zwitterionic Sulfobetaine Hydrogel Electrolyte Building Separated Positive/Negative Ion Migration Channels for Aqueous Zn‐MnO 2 Batteries with Superior Rate Capabilities
Author(s) -
Mo Funian,
Chen Ze,
Liang Guojin,
Wang Donghong,
Zhao Yuwei,
Li Hongfei,
Dong Binbin,
Zhi Chunyi
Publication year - 2020
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202000035
Subject(s) - electrolyte , materials science , battery (electricity) , biocompatibility , ionic conductivity , fabrication , nanotechnology , ion , chemical engineering , electrochemistry , electrode , organic chemistry , chemistry , engineering , medicine , power (physics) , physics , alternative medicine , quantum mechanics , pathology , metallurgy
Abstract Hydrogel electrolytes have attracted increasing attention due to their potential uses in the fabrication of flexible solid‐state batteries. However, the development of hydrogel electrolytes is still in the initial stage and the number of available strategies is limited. Ideally, the hydrogel electrolyte should exhibit suitable ionic conductivity rate, mechanical strength, and biocompatibility for safety. In this study, a zwitterionic sulfobetaine/cellulose hydrogel electrolyte is fabricated using raw materials from natural plants, which exhibits a good biocompatibility with mammalian cells. The intrinsic zwitterionic groups on sulfobetaine chains can provide separated ion migration channels for positive and negative ions, which largely facilitates electrolyte ion transport. A solid‐state Zn‐MnO 2 battery with a fabricated zwitterionic gel electrolyte exhibits a very high rate performance. It exhibits a specific capacity of 275 mA hgMnO 2− 1at 1 C. Even up to 30 C, a high capacity of 74 mA hgMnO 2− 1is maintained during the charging–discharging for up to 10 000 cycles. For wearable applications, the flexible solid‐state batteries can be used as reliable and portable sources to power different wearable electronics such as a commercial smart watch, electroluminescent panel, and color electroluminescence line, which shows their large potentials for use in next‐generation flexible and wearable battery technologies.