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Here, a bio\u2010inspired hydrogel electrolyte reconstructed from wood chips overcomes this bottleneck by separating cellulose and lignin: cellulose forms a hydrated network while the extracted lignin is re\u2010applied as an outer water\u2010retentive layer, mimicking the hierarchical fiber\u2010bark architecture of plants. Beyond hydration, the electrolyte implements triple Zn\n                    <jats:sup>2+<\/jats:sup>\n                    confinement through phosphate\u2010based chelators, dynamic Schiff\u2010base coordination, and polymeric domains, stabilizing Zn\n                    <jats:sup>2+<\/jats:sup>\n                    , suppressing ZnO accumulation, and maintaining interfacial reaction equilibrium at the zinc anode. Flexible ZABs incorporating this electrolyte deliver high power density (124.9\u00a0mW\u00a0cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    ), robust mechanical adaptability, and extended cycling up to 600\u00a0h at 1\u00a0mA\u00a0cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    , while remaining operational under low\u2010temperature and dry conditions. Fully biodegradable and derived from abundant biomass, this system demonstrates that durability arises from hierarchical ion regulation and reaction\u2010equilibrium control rather than water retention alone, providing mechanistic insight into flexible ZABs failure. This work establishes a framework in which biomass valorization and bio\u2010inspired hierarchical design enable durable, high\u2010performance, and environmentally sustainable flexible energy storage.\n                  <\/jats:p>","DOI":"10.1002\/adma.75386","type":"journal-article","created":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T10:39:28Z","timestamp":1791887968000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Bio\u2010Inspired Reconstruction of Wood\u2010Chip Electrolytes Enables Triple Zn\n                    <sup>2+<\/sup>\n                    Confinement for Durable and Sustainable Flexible Zinc\u2010Air Batteries"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3691-2744","authenticated-orcid":false,"given":"Tao","family":"Shui","sequence":"first","affiliation":[{"name":"School of Materials Science and Engineering Southeast University  Nanjing 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