A Patternable and In Situ Formed Polymeric Zinc Blanket for a Reversible Zinc Anode in a Skin‐Mountable Microbattery

• DOI: 10.1002/adma.202007497
• Publication Date: 2021-01-15T22:20:29Z
• Authors: Minshen Zhu; Junping Hu; Qiongqiong Lu; Haiyun Dong; Dmitriy D. Karnau...; Christian Becker; Daniil Karnaushenko; Yang Li; Hongmei Tang; Zhe Qu; Jin Ge; Oliver G. Schmidt
• Keywords: Galvanic anode; Zinc compounds

Owing to their high safety and reversibility, aqueous microbatteries using zinc anodes an acid electrolyte have emerged as promising candidates for wearable electronics. However, a critical limitation that prevents implementing chemistry at the microscale lies in its spontaneous corrosion acidic causes capacity loss of 40% after ten-hour rest. Widespread anti-corrosion techniques, such polymer coating, often retard kinetics plating/stripping lack spatial control microscale. Here, polyimide coating resolves this dilemma is reported. The hence reduces standby microbattery 10%. coordination carbonyl oxygen with ions builds up over cycling, creating blanket minimizes concentration gradient through electrode/electrolyte interface thus allows fast low overpotential. polyimide's patternable feature energizes both hydrogel electrolytes, delivering supercapacitor-level rate performance 400 stable cycles electrolyte. Moreover, able be attached human skin offers strong resistance deformations, splashing, external shock. skin-mountable demonstrates excellent combination anti-corrosion, durability wearables.