Berlin 2018 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 1: Layer Properties: Electronic, Optical and Mechanical

DS 1.3: Vortrag

Montag, 12. März 2018, 10:00–10:15, H 0111

2D protective films for lithium and sodium metal anodesHongzhen Tian1, Zhi W. Seh2, Kai Yan2, Zhongheng Fu1, Peng Tang1, Yingying Lu3, Ruifeng Zhang1, •Dominik Legut4, Yi Cui5, and Qianfan Zhang11School of Materials Science and Engineering,Beihang University, Beijing 100191, China — 2Institute of Materials Research and Engineering Agency for Science, Technology and Research, Innovis, Singapore 138634, Singapore — 3State Key Laboratory of Chemical Engineering College of Chemical and Biological Engineering Zhejiang University Hangzhou 310027, China — 4IT4Innovations Center, VSB-TU Ostrava, 17.listopadu 15, CZ 70833 Ostrava, Czech Republic — 5Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA

Rechargeable batteries based on lithium (sodium) metal anodes have been attracting increasing attention due to their high capacity and energy density, but exhibit drawbacks, such as low Coulombic efficiency and dendrites growth. Lay- ered materials have been used experimentally as protective films (PFs) to address these issues. Here we use first-principles calculations to determine the properties and feasibility of various 2D layered PFs.It is found that the introduction of defect, the increase in bond length, and the proximity effect by metal can accelerate the transfer of Li+ (Na+) ion and improve the ionic conductivity, but all of them make negative influences on the stiffness of materials. [1] H. Tian et al, Advan. Ene. Mat. 7, 1602528 (2017).
This work was supported by CSF grant No. 17-27790S and Path to Exascale project No. CZ.02.1.01/0.0/0.0 /16_013/0001791.

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