Bin Qiu, Kaiyuan Liang, Wei Huang, Guoqiang Zhang, Chuanxin He, Peixin Zhang, Hongwei Mi

Crystal‐Facet Manipulation and Interface Regulation via TMP‐Modulated Solid Polymer Electrolytes toward High‐Performance Zn Metal Batteries

  • General Materials Science
  • Renewable Energy, Sustainability and the Environment
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AbstractRechargeable Zn‐ion batteries (ZIBs), prospective candidates for broad‐scale energy storage, still encounter many challenges such as hydrogen evolution corrosion, Zn dendrite growth, and capacity fading. Therefore, one specific strategy for tuning the internal structure of solid polymer electrolytes (SPEs) via organic additives is proposed to address these urgent bottlenecks simultaneously. With trimethyl phosphate (TMP) addition, the coordination environment of Zn2+in SPEs is altered and exists as Zn2+(TMP)x(OTf−)ycoordinated molecules. Meanwhile, the strong interaction between TMP and Zn enables the preferential growth of Zn(002) planes during electrodeposition, which is proved based on first‐principles calculations, finite element simulations, and multiple in situ characterizations. Such excellent interfacial engineering in situ forms the solid electrolyte interface rich in Zn3(PO4)2fast ion conductor and guarantees one ultra‐long cycle life for more than 6000 h in a Zn|Zn symmetric cell at 0.1 mA cm−2. Moreover, the universality of TMP‐modified SPEs shows 1000 times stable cycling of VO2(B)|Zn full cells at 1 A g−1under 0 °C with 95.24% capacity retention, which satisfies potential applications of wide‐ranging energy storage based on solid‐state ZIBs.

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