Guo M, Yuan C, Zhang T, Yu X. Solid-State Electrolytes for Rechargeable Magnesium-Ion Batteries: From Structure to Mechanism.
SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022;
18:e2106981. [PMID:
35182102 DOI:
10.1002/smll.202106981]
[Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/30/2021] [Indexed: 06/14/2023]
Abstract
Rechargeable magnesium (Mg)-ion batteries have received growing attention as a next-generation battery system owing to their advantages of sufficient reserves, lower cost, better safety, and higher volumetric energy density than lithium-ion batteries. However, Mg as an anode can be easily passivated during charging/discharging by most common solvents, which are inconducive for magnesium deposition/stripping. Based on this, the development of Mg-ion solid-state electrolytes in the last decades led to the formulization of several concepts beyond previously reported designs. These exciting studies have once again sparked an interest in all-solid-state magnesium-ion batteries. In this review, Mg solid-state electrolytes, including inorganic (oxides, hydrides, and chalcogenides) and organic (metal-organic frameworks and polymers) materials are classified and summarized in detail. Moreover, the structural characteristics and the migration mechanism of Mg2+ ions are also discussed with a focus on pending questions and future prospects.
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