High-performance magnesium metal batteries via switching the passivation film into a solid electrolyte interphase
- Authors
- Bae, Jiwoong; Park, Hyoju; Guo, Xuelin; Zhang, Xiao; Warner, Jamie H.; Yu, Guihua
- Issue Date
- Jun-2021
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- ENERGY & ENVIRONMENTAL SCIENCE, v.14, no.8, pp 4391 - 4399
- Pages
- 9
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENERGY & ENVIRONMENTAL SCIENCE
- Volume
- 14
- Number
- 8
- Start Page
- 4391
- End Page
- 4399
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/189229
- DOI
- 10.1039/D1EE00614B
- ISSN
- 1754-5692
1754-5706
- Abstract
- Magnesium-ion batteries have been regarded as a promising alternative to the lithium-ion batteries due to their high theoretical capacity, relatively high potential, and magnesium abundance. However, the contradiction between the plating/stripping of Mg2+ and the electrolytes' oxidative stability has hampered the Mg-ion battery's development for energy storage applications. Here, we designed an amorphous MgO-wrapped Zn-skeleton as a unique current collector for an anode-free Mg battery to allow reversible Mg2+ plating/stripping in oxidatively stable electrolytes. The significant lattice mismatch between hexagonal Zn and MgO induces dislocations, leading to a highly defective interphase. This layer behaves as a mixed ionic-electronic conductor, rendering Mg nanoparticles upon electroplating. Combined with a large surface area, the proposed current collector considerably improved the charge transfer kinetics and lowered the cell impedance for Mg2+ plating/stripping by 1/20 of the typical Mg metal. Moreover, the Mg2+ interphase conduction was two orders of magnitude higher (similar to 10(-11) S cm(-1)) compared to the widely known passivating layer (<10(-13) S cm(-1)). This special design enables Mg-Li hybrid batteries with non-corrosive electrolytes to exhibit a high-operating-voltage of 2.82 V vs. Mg/Mg2+ and an energy density of 412.5 W h kg(-1).
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