Lee, Seon Hwa Hwang, Jang-Yeon Ming, Jun Cao, Zhen Hoang Anh Nguyen Jung, Hun-Gi Kim, Jaekook Sun, Yang-Kook 2024-01-19T17:33:36Z 2024-01-19T17:33:36Z 2021-09-05 2020-05 1614-6832 https://pubs.kist.re.kr/handle/201004/118679 Herein, a new solvation strategy enabled by Mg(NO3)(2) is introduced, which can be dissolved directly as Mg2+ and NO3- ions in the electrolyte to change the Li+ ion solvation structure and greatly increase interfacial stability in Li-metal batteries (LMBs). This is the first report of introducing Mg(NO3)(2) additives in an ester-based electrolyte composed of ternary salts and binary ester solvents to stabilize LMBs. In particular, it is found that NO3- efficiently forms a stable solid electrolyte interphase through an electrochemical reduction reaction, along with the other multiple anion components in the electrolyte. The interaction between Li+ and NO3- and coordination between Mg2+ and the solvent molecules greatly decreases the number of solvent molecules surrounding the Li+, which leads to facile Li+ desolvation during plating. In addition, Mg2+ ions are reduced to Mg via a spontaneous chemical reaction on the Li metal surface and subsequently form a lithiophilic Li-Mg alloy, suppressing lithium dendritic growth. The unique solvation chemistry of Mg(NO3)(2) enables long cycling stability and high efficiency of the Li-metal anode and ensures an unprecedented lifespan for a practical pouch-type LMB with high-voltage Ni-rich NCMA73 cathode even under constrained conditions. English WILEY-V C H VERLAG GMBH ANODE LAYER IONS Toward the Sustainable Lithium Metal Batteries with a New Electrolyte Solvation Chemistry Article 10.1002/aenm.202000567 1 ADVANCED ENERGY MATERIALS, v.10, no.20 ADVANCED ENERGY MATERIALS 10 20 scie scopus 000537791700002 2-s2.0-85083527880 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Energy & Fuels Materials Science Physics Article ANODE LAYER IONS electrolyte solvation structures high energy density Li-Mg alloys lithium metal batteries