Alkali Adatom-amplified Schottky contact and built-in voltage for stable Zn-metal anodes

Ryanda Enggar Anugrah Ardhi, Guicheng Liu*, Jihun Park, Joong Kee Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Development of rechargeable Zn-metal batteries is limited by side reactions, dendrite growth, and low ion-diffusion kinetics on Zn-anodes. Herein, alkali-metal adatom-modified amorphous carbon cluster passivation films (CCF-Ms) were formed on Zn-anodes by radiofrequency plasma thermal evaporation and alkali-metal hydroxide treatment. Plasma energy and alkali-metal hydroxide adatoms develop p-type semiconducting property and chemical durability of the carbon film by inducing dangling bonds and O-containing functional groups, to form Schottky contact between CCF-M and Zn metal with significant Schottky barrier (ΦSB) and built-in voltage (Vbi). CCF-M, ΦSB, and Vbi effectively enhanced the corrosion resistance, dendrite suppression, and Zn2+-transport kinetics of the Zn-anode, respectively. Specifically, Zn2+ was guided to deposit rapidly and uniformly below CCF-M without dendrites and side reactions during over 5000 and 1302 cycles in symmetric cell at 1.0 and 10 mA cm−2, respectively, with a capacity retention of ∼83% after 5000 cycles at 1.0 A g−1V2O5 in Zn|V2O5 full cell.

Original languageEnglish (US)
Pages (from-to)863-874
Number of pages12
JournalEnergy Storage Materials
Volume54
DOIs
StatePublished - Jan 2023

Bibliographical note

Funding Information:
This research was supported by the Brain Pool program funded by the Ministry of Science and ICT through the National Research Foundation of Korea ( 2019H1D3A1A01069779 ). This study was also supported by the KIST Institutional Program (2E31863, 2V09284). The authors thank Mr. Joo Man Woo (KIST) for technical support during the preparation of this study, and Dr. Cininta Anisa Savitri (KIST) for help in conducting the UV–Vis measurements.

Funding Information:
This research was supported by the Brain Pool program funded by the Ministry of Science and ICT through the National Research Foundation of Korea (2019H1D3A1A01069779). This study was also supported by the KIST Institutional Program (2E31863, 2V09284). The authors thank Mr. Joo Man Woo (KIST) for technical support during the preparation of this study, and Dr. Cininta Anisa Savitri (KIST) for help in conducting the UV–Vis measurements.

Publisher Copyright:
© 2022

Keywords

  • Amorphous carbon film
  • Built-in voltage
  • Dendrite-free Zn-metal anode
  • Ion transport kinetics
  • Schottky contact
  • Semiconducting passivation layer

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science
  • Energy Engineering and Power Technology

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