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Structurally Engineered Soft-Elastic Polymers as Stress-Adaptive and Deposition-Regulating Layers for Ultrastable and High-Rate Zn-Powder Anodes
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DOI：10.1002/adfm.202522521.png)
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Abstract
En 中文
To address the poor durability hindering zinc powder (Zn-P) anodes in aqueous zinc-ion batteries (AZIBs), soft-elastic amino-functionalized polymer-modified Zn-P anodes (P-A2@NH2) are developed inspired by a novel mechanistic understanding involving internal stress and complex ion transport. The polymer forms a dynamically swelling 3D network that facilitates internal stress mitigation and efficient Zn2+ transport, while its amino groups modulate the solvation sheath and regulate Zn2+ deposition. The resulting Zn-P/P-A2@NH2 anode enables symmetric cells to achieve ultra-long cycling (>8 300 h at 2.5 mA cm−2/0.5 mAh cm−2) and maintains stability for 2 000 h at 25 mA cm−2 with 87.5% depth of discharge and 25 000 mAh cm−2 cumulative plating capacity. When paired with an AlVO-H2O cathode, full cells deliver 314 mAh g−1 at 2 A g−1 with 91.93% capacity retention over 500 cycles at a low N/P ratio of 2.4. This work provides a fundamental and universal strategy to enhance Zn-P anode durability, enabling ultrastable and ultrahigh-rate AZIBs.
Keywords:
aqueous zinc-ion batteries
soft-elastic polymers
stress-adaptive layers
ultrahigh-current cycling
Journal
IF:
19
Papers:
3.4W
Citations:
32.1W