Kim, Ji Young Liu, Guicheng Ardhi, Ryanda Enggar Anugrah Park, Jihun Kim, Hansung Lee, Joong Kee 2024-01-19T13:01:25Z 2024-01-19T13:01:25Z 2022-04-05 2022-01 2311-6706 https://pubs.kist.re.kr/handle/201004/115834 The practical applications of aqueous Zn metal batteries are currently restricted by the inherent drawbacks of Zn such as the hydrogen evolution reaction, sluggish kinetics, and dendrite formation. To address these problems, herein, a limitedly Zn-doped MgF2 interphase comprising an upper region of pure, porous MgF2 and a lower region of gradient Zn-doped MgF2 is achieved via radio frequency sputtering technique. The porous MgF2 region is a polar insulator whose high corrosion resistance facilitates the de-solvation of the solvated Zn ions and suppression of hydrogen evolution, resulting in Zn metal electrodes with a low interfacial resistance. The Zn-doped MgF2 region facilitates fast transfer kinetics and homogeneous deposition of Zn ions owing to the interfacial polarization between the Zn dopant and MgF2 matrix, and the high concentration of the Zn dopant on the surface of the metal substrate as fine nuclei. Consequently, a symmetric cell incorporating the proposed Zn metal exhibits low overpotentials of similar to 27.2 and similar to 99.7 mV without Zn dendrites over 250 to 8000 cycles at current densities of 1.0 and 10.0 mA cm(-2), respectively. The developed Zn/MnO2 full cell exhibits superior capacity retentions of 97.5% and 84.0% with average Coulombic efficiencies of 99.96% after 1000 and 3000 cycles, respectively. English SHANGHAI JIAO TONG UNIV PRESS Stable Zn Metal Anodes with Limited Zn-Doping in MgF2 Interphase for Fast and Uniformly Ionic Flux Article 10.1007/s40820-021-00788-z 1 Nano-Micro Letters, v.14, no.1 Nano-Micro Letters 14 1 Y scie scopus 000745599200001 2-s2.0-85123578817 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Science & Technology - Other Topics Materials Science Physics Article ZINC FILMS DEPOSITION INTERFACE CHALLENGES BARRIER OPTICAL-PROPERTIES Zinc metal battery MgF2 layer Limited zinc doping Ion-transfer kinetic Deposition guidance