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This study aims to investigate and enhance the overall performance of a Zn\u2010MnO<jats:sub>2<\/jats:sub> alkaline battery and make it suitable for safe and flexible wearable applications. To achieve high cyclability and performance of the cathode, issues of low active\u2010material availability for redox reactions and inactive\u2010phase formations are overcome by fabricating a binder\u2010free hierarchical (increased surface area) additives (enabled reversible compound formation) based MnO<jats:sub>2<\/jats:sub> cathode. Furthermore, zinc\/stainless steel composite anode (to reduce anode shape changes) and calcium hydroxide coated polymer electrolyte (to stop zincate ion transfer) are used to improve cyclability. By assembling the above mentioned layers, excellent rate capabilities, high\u2010capacity utilization (487 mAh g<jats:sup>\u22121<\/jats:sup>), long cycling stabilities (1000 cycles with 70% retention), and high energy density (400\u00a0Wh kg<jats:sup>\u22121<\/jats:sup>) are achieved. Moreover, bending, hammering, puncturing, and lighting up an light emitting diode are conducted (under flat, bent, and cut) to demonstrate the cells\u2019 safety, flexibility, and robustness. The successful findings in this study can chart new pathways to the development of safe, flexible, and cost\u2010effective next\u2010generation energy storage sources for wearables.<\/jats:p>","DOI":"10.1002\/smll.202103495","type":"journal-article","created":{"date-parts":[[2022,4,14]],"date-time":"2022-04-14T07:44:12Z","timestamp":1649922252000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Flexible and Safe Additives\u2010Based Zinc\u2010Binder\u2010Free\u2010Hierarchical MnO<sub>2<\/sub>\u2010Solid Alkaline Polymer Battery for Potential Wearable Applications"],"prefix":"10.1002","volume":"18","author":[{"given":"Aswani","family":"Poosapati","sequence":"first","affiliation":[{"name":"Department of Mechanical Engineering University of Maryland Baltimore County  Baltimore MD 21228 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rohan 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