Stable Solid Electrolyte Interphase for Long-Life Potassium Metal Batteries

Jimin Park; Yeseul Jeong; Muhammad Hilmy Alfaruqi; Yangyang Liu; Xieyu Xu; Shizhao Xiong; Min-Gi Jung; Hun-Gi Jung; Jaekook Kim; Jang-Yeon Hwang; Yang-Kook Sun

doi:10.1021/acsenergylett.1c02354

journal article·2022-01-14

Stable Solid Electrolyte Interphase for Long-Life Potassium Metal Batteries

Jimin Park, Yeseul Jeong, Muhammad Hilmy Alfaruqi, Yangyang Liu, Xieyu Xu, Shizhao Xiong, Min-Gi Jung, Hun-Gi Jung, Jaekook Kim, Jang-Yeon Hwang, Yang-Kook Sun

ACS Energy Letters· Volume 7· Issue 1

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Source abstract

Abstract

Potassium (K) is considered to be the most suitable anode material for rechargeable K batteries because of its high theoretical capacity (686 mAh g–1) and low redox potential (−2.93 V vs SHE). However, uneven electrodeposition of K during cycling usually leads to the growth of dendrites, resulting in low Coulombic efficiency and compromising battery safety. Herein, we develop a strategy for stabilizing K metal through simple interface control. The conductive passivation layer can be controllably designed by a spontaneous chemical reaction when a K metal foil is kept in contact with a liquid-phase potassium-polysulfide (PPS); this guides the formation of an electronically and ionically conductive solid electrolyte interphase layer including K2S compound, enabling dense K plating with a dendrite-free morphology. Compared to the bare K metal anode, the PPS-treated K metal anode demonstrates superior cycling stability in symmetric half cells and full cells using a TiS2 cathode under practical constraints.

Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science and Engineering, Chonnam National University, Gwangju 61186, Republic of Korea

Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny, Moscow Region 141701, Russia

Faculty of Materials Science, Lomonosov Moscow State University, Leninskie gory 1, Moscow 119991, Russia

Department of Physics, Chalmers University of Technology, SE41296 Göteborg, Sweden

Center for Energy Storage Research, Clean Energy Institute Korea Institute of Science and Technology, Seoul 02792, Republic of Korea

Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea

Funding

National Research Foundation of Korea · Ministry of Trade, Industry and Energy

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