Sulfonated hydrogel electrolyte enables dendrite-free zinc-ion batteries

Hu，Yingqi1; Wang，Zhan2; Li，Yingzhi2; Liu，Peiwen2; Liu，Xinlong2; Liang，Guangxian1; Zhang，Di1; Fan，Xin1; Lu，Zhouguang2; Wang，Wenxi3

2024

10.1016/j.cej.2023.147762

Chemical Engineering Journal   影响因子和分区

1385-8947

Metallic Zn anode is plagued by severe side reactions and dendrite growth, preventing the commercial development of Zn-ion batteries (ZIBs). Semi-solid state hydrogel electrolyte has received immense attention in aqueous Zn-ion batteries due to their intrinsic advantages (e.g., wider electrochemical windows, good interfacial compatibility, and multi-functional applications). However, their inferior ionic conductivity and mechanical deformation tolerance are the main barriers to realizing the true application in ZIBs. Herein, a hydrogel electrolyte with high ionic conductivity and high flexibility is fabricated through sulfonated chitosan and further cross-linking with polyacrylamide. Accordingly, the ion conductivity of the hydrogel electrolyte increases from 28.2 to 38.1 mS cm, whilst tensile strength is elevated from 19.1 to 54.2 kPa. With this hydrogel electrolyte, the Zn||Zn symmetric cells show exceptional cycle stability over 2600 h at the current density of 1 mA cm, and the Zn||Cu asymmetric cells demonstrate nearly 100 % coulomb efficiency over 1200 cycles. In addition, NHVO||Zn full cells enable capacity retention of as high as 96.1 % even over 500 cycles, and the as-assembled flexible batteries can stand bending, twisting, and cutting operation without comprising the electrochemical performance.

Flexible battery High ion conductivity Hydrogel electrolyte Sulfonate group

SCI ; EI

英语

其他

ENGINEERING

2-s2.0-85179482335

Scopus

1.College of Materials Science and Engineering,Guilin University of Technology,Guilin,541004,China
2.Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials,Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Department for Electrochemical Energy Storage,Berlin,Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1,Germany

Hu，Yingqi,Wang，Zhan,Li，Yingzhi,et al. Sulfonated hydrogel electrolyte enables dendrite-free zinc-ion batteries[J]. Chemical Engineering Journal,2024,479.

Hu，Yingqi.,Wang，Zhan.,Li，Yingzhi.,Liu，Peiwen.,Liu，Xinlong.,...&Wang，Wenxi.(2024).Sulfonated hydrogel electrolyte enables dendrite-free zinc-ion batteries.Chemical Engineering Journal,479.

Hu，Yingqi,et al."Sulfonated hydrogel electrolyte enables dendrite-free zinc-ion batteries".Chemical Engineering Journal 479(2024).