4.8 Article

Binder-Free Sodium Zinc Phosphate Protection Layer Enabled Dendrite-Free Zn Metal Anode

Journal

ACS APPLIED MATERIALS & INTERFACES
Volume -, Issue -, Pages -

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c13499

Keywords

zinc metal anode; dendrite-free; long cycle life; lower energy barrier; aqueous zinc ion battery

Funding

  1. National Natural Science Foundation of China [52102214, 51702048, 22166003]
  2. Jiangxi Provincial Natural Science Foundation [20202BAB213008, 20202BABL213003, 20202BABL203026]
  3. Opening Project of Jiangxi Province Engineering Research Center of New Energy Technology and Equipment [JXNE2021-04, JXNE2021-05]
  4. State Key Laboratory of Materials Processing and Die & Mold Technology, Huazhong University of Science and Technology [P2022-009]
  5. National (Jiangxi Province) College Students Innovation and Entrepreneurship Training Program 2020 and 2021 [S202110405018, S202010405031, S202010405018]
  6. Science and Technology Department of Jiangxi province [20171BBE50031]
  7. Hainan Provincial Natural Science Foundation of China [221RC449]
  8. Basic and Applied Basic Research Foundation of Guangdong Province [2019A1515110558]
  9. Start-up Research Foundation of Hainan University [KYQD(ZR)20082]
  10. Research Fund Program of Key Laboratory of Fuel Cell Technology of Guangdong Province [202021]

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The research successfully developed a robust sodium zinc phosphate layer (Zn@NZP) on zinc metal foil anode via facile electrodeposition, which effectively alleviates dendrite formation and corrosion issues on the anode of aqueous zinc batteries, leading to improved cycle life and battery performance.
Aqueous Zn battery has been a promising alternative battery in large-scale energy storage systems due to its cost-effectiveness, sustainability, and intrinsic safety. However, its cycle life is impeded by the dendrite formation, severe corrosion, and side reactions on the zinc metal anode. Most ex situ coatings on the zinc surface extend the life span of zinc anodes but have drawbacks in Zn2+ ion conductivity. Herein, a robust sodium zinc phosphate layer was in situ built on zinc metal foil anode (Zn@ NZP) via facile electrodeposition. The Zn2+ ion conducting protection layer alleviates corrosion, suppresses zinc dendrites, and lowers the energy barrier of Zn2+ plating and stripping. As a result, the Zn@NZP anode renders dendrite-free plating/stripping with a small overpotential of about 44 mV and a 12-fold enhancement long-life span compared to the bare zinc. Furthermore, a full cell using the Zn@NZP anode shows much improved capacity and cycling stability. This work provides a promising anode candidate for dendrite-free aqueous zinc ion batteries.

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