Detrimental Effects of Surface Imperfections and Unpolished Edges on the Cycling Stability of a Zinc Foil Anode

Pan He, Jiaxing Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

62 Scopus citations

Abstract

A zinc foil or sheet is the most common form of anode for aqueous zinc ion batteries since it is massively manufactured and readily accessible. Short circuits from dendrites grown on zinc foil anodes can dramatically decrease the cycling stability and lead to premature failure of the batteries. Here, we show that manufacturing-induced defects, including surface imperfections such as a roughened surface, microcracks, scratches, or fold lines, as well as unpolished edges from cutting can all promote local dendrite growth, leading to drastically decreased cycling stability of the batteries. Such surface imperfections and unpolished edges are quite common during metal sheet manufacturing and processing; therefore, their detrimental effects in zinc ion batteries should be factored in when evaluating and comparing device performances. Mitigation methods and new electrode processing techniques that can minimize these effects must be developed for safe deployment of zinc ion batteries on a large scale.

Original languageEnglish (US)
Pages (from-to)1990-1995
Number of pages6
JournalACS Energy Letters
Volume6
Issue number5
DOIs
StatePublished - May 14 2021

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

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