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Marginal Magnesium Doping for High-Performance Lithium Metal Batteries

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Title
Marginal Magnesium Doping for High-Performance Lithium Metal Batteries
Author(s)
Choi, SH; Lee, SJ; Yoo, DJ; Park, JH; Park, JH; Ko, YN; Park, J; Sung, YE; Chung, SY; Kim, H; Choi, JW
Publication Date
2019-11
Journal
ADVANCED ENERGY MATERIALS, v.9, no.41, pp.1902278 -
Publisher
WILEY-V C H VERLAG GMBH
Abstract
Due to unparalleled theoretical capacity and operation voltage, metallic Li is considered as the most attractive candidate for lithium-ion battery anodes. However, Li metal electrodes suffer from uncontrolled dendrite growth and consequent interfacial instability, which result in an unacceptable level of performance in cycling stability and safety. Herein, it is reported that a marginal amount (1.5 at%) of magnesium (Mg) doping alters the surface properties of Li metal foil drastically in such a way that upon Li plating, a highly dense Li whisker layer is induced, instead of sharp dendrites, with enhanced interfacial stability and cycling performance. The effect of Mg doping is explained in terms of increased surface energy, which facilitates plating of Li onto the main surface over the existing whiskers. The present study offers a useful guideline for Li metal batteries, as it largely resolves the longstanding shortcoming of Li metal electrodes without significantly sacrificing their main advantages. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
https://pr.ibs.re.kr/handle/8788114/6765
ISSN
1614-6832
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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