Park, Jimin Jeong, Yeseul Alfaruqi, Muhammad Hilmy Liu, Yangyang Xu, Xieyu Xiong, Shizhao Jeong, Min Gi Jung, Hun-Gi Kim, Jaekook Hwang, Jang-Yeon Sun, Yang-Kook 2024-01-19T13:01:30Z 2024-01-19T13:01:30Z 2022-04-03 2022-01 2380-8195 https://pubs.kist.re.kr/handle/201004/115840 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. English AMER CHEMICAL SOC Stable Solid Electrolyte Interphase for Long-Life Potassium Metal Batteries Article 10.1021/acsenergylett.1c02354 1 ACS ENERGY LETTERS, v.7, no.1, pp.401 - 409 ACS ENERGY LETTERS 7 1 401 409 N scie scopus 000737867400001 2-s2.0-85122579612 Chemistry, Physical Electrochemistry Energy & Fuels Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Science & Technology - Other Topics Materials Science Article; Early Access TIS2 LITHIUM METAL ION CATHODE MECHANISM ENERGY OXIDE