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High‐Performance Polymer Electrolytes
In article number 2107764, Xinran Wang, Ying Bai, Chuan Wu, and co‐workers develop a hyperbranched polyether electrolyte for solid‐state Li metal batteries. The existing ion‐solvation structures allow for fast Li+ migration (1.26 × 10−4 S cm−1, 25 °C), a wide stable voltage window (up to 4.6 V), and Li dendrite suppression, overcoming the insufficiencies encountered...
Solid‐state electrolytes (SSEs) with sufficient ionic conduction, wide voltage window, flexible‐rigid interface, and ease of processibility are determinative to the development of energy‐dense solid‐state lithium metal batteries. Due to the low density and interfacial compatibility, polyether SSE has been studied for decades but remains handicapped by the inherently low ionic conductivity and insufficient...
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