Ultrathin cellulosic gel electrolytes with a gradient hydropenic interface for stable, high-energy and flexible zinc batteries

Ultrathin cellulose-based electrolytes (DCG, 10 μm) with a gradient hydropenic interface were designed to minimize side reactions and guide (002) textured deposition. DCG enhanced flexible Zn batteries to 222 W h kg −1 and 214.3 W h L −1 .