Electrochemical assessment of highly reversible SnO2–coated Zn metal anodes prepared via atomic layer deposition for aqueous Zn-ion batteries

Sang Hyuk Gong, Hyo Jin Lim, Ji Hyeon Lee, Yiseul Yoo, Seungho Yu, Hee Dae Lim, Hyun Wook Jung, Jesse S. Ko, In Soo Kim, Hyung Seok Kim

Research output: Contribution to journalArticlepeer-review

Abstract

Aqueous electrochemical energy storage systems that rely on earth-abundant elements are considered as cost-effective alternatives to current lithium-ion batteries which have dominated the technological landscape. For zinc-based energy storage, dendrite growth is an underlying challenge that needs to be addressed to enact high performance and long-term stability. In the present study, we employ atomic layer deposition to produce a thin tin oxide layer that allows dendrite-free cycling for aqueous zinc-ion batteries. Tin oxide is particularly interesting as it provides two distinct advantages—dendrite-free cycling and mitigation of parasitic hydrogen gas evolution. The presence of the tin oxide layer leads to hydrogen gas suppression and homogeneous zinc plating/stripping, both of which are essential to improve the performance of zinc-ion batteries. When paired in a full-cell configuration with manganese oxide, this anode delivers a high specific capacity of 273 mAh g−1 at an imposed current rate of 100 mA g−1. Through density functional theory calculations, we elucidate further that the adsorption energy of Zn for bare Zn is higher than that in the presence of a tin oxide layer.

Original languageEnglish
Article number155633
JournalApplied Surface Science
Volume611
DOIs
Publication statusPublished - 2023 Feb 15

Keywords

  • Aqueous zinc-ion battery
  • Atomic layer deposition
  • Tin oxide
  • Zinc metal anode

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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