A Semi-Liquid Electrode toward Stable Zn Powder Anode

Qun Liu, Zhenlu Yu, Rui Zhou, Biao Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

22 Citations (Scopus)

Abstract

Zn powder anode possesses great versatility compared to the Zn foil counterpart, but the rough surface with a high surface area aggravates the corrosion and dendrite growth. Herein, a dendrite-free and anti-corrosive semi-liquid Zn anode (SLA) is successfully fabricated based on Zn powder and a thickening agent. Benefiting from the rheological property, the unique anode effectively releases the stress induced by Zn plating, especially under high-current densities. Meanwhile, the dual-conductive medium, i.e., ionic and electronic, homogenizes the ion flux and allows the stripping/plating to occur within the entire anode. In a symmetric cell, the SLA anode exhibits stable electrochemical behavior with a prolonged lifespan at the current density of 5 mA cm−2/10 mA cm−2 under the capacity of 5 mAh cm−2/10 mAh cm−2. Improved durability of more than 5000 cycles is endowed when assembling an SLA anode with a vanadium-based cathode. This study provides an electrode rheology-based approach to overcome the stability challenge of powder anode for scale-up manufacturing.

Original languageEnglish
Article number2210290
JournalAdvanced Functional Materials
Volume33
Issue number5
DOIs
Publication statusPublished - Nov 2022

Keywords

  • anti-corrosion
  • rheological property
  • semi-liquid electrodes
  • stress relaxation
  • Zn powder

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Biomaterials
  • General Materials Science
  • Condensed Matter Physics
  • Electrochemistry

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