A materials perspective on magnesium-ion-based solid-state electrolytes

Abstract

As economically viable alternatives to lithium-ion batteries, magnesium-ion-based all-solid-state batteries have been researched to meet the criteria for an ideal energy storage device.

Recent advances in process engineering and upcoming applications of metal–organic frameworks

“…The increasing demand on energy storage systems has triggered great importance on electrochemical storage devices such as Li-batteries, redox-flow batteries, and supercapacitors [325] , [326] . Battery technologies have been widely explored to deliver superior characteristics like high power density, fast charge/discharge rates, and long lifetime [327] . Most conventional batteries including Li-ion batteries (LIBs) utilize a polymer membrane saturated with an organic liquid electrolyte, which can lead to serious safety issues, such as leakage, poor chemical stability, and flammability.…”

Practical energy densities, cost, and technical challenges for magnesium‐sulfur batteries

“…Solid-state batteries are promising candidates for overcoming the intrinsic problem associated with liquid electrolyte. [79][80][81] At present, one of the key challenges in obtaining a suitable solid-state magnesium-based electrolyte lies in the ionic conductivity at room temperature (around 1 mS cm −1 ). 79 However, with few exceptions, [82][83][84] the low room-temperature ionic conductivities are the upmost challenge hampering the application of solid-state electrolytes (SSEs).…”

“…Solid‐state batteries are promising candidates for overcoming the intrinsic problem associated with liquid electrolyte 79‐81 . At present, one of the key challenges in obtaining a suitable solid‐state magnesium‐based electrolyte lies in the ionic conductivity at room temperature (around 1 mS cm −1 ) 79 .…”

“…However, the electrochemical performance of anodes based on the pressed powder of Mg/C (14%) showed better coulombic efficiencies than those based on an Mg foil. Currently used separators in Mg/S batteries are mainly based on commercial glass fiber, Celgard, and polymer membranes (Figure 1c). From the literature review analysis, generally glass fiber separators (68%) outperform others in terms of thermal stability, porosity, permeability, and ionic conductivity; but they are more costly and require more electrolyte 78,79 The S content reflects the total S in the whole cathode as wt% S (Figure 1D) which allows the estimation of the capacity of the cell.…”

Electrochemistry: Retrospect and Prospects

“…Polymer/ceramic/glassy electrolytes should help improve energy density and safety. [27,28] Studies on polymer electrolytes concern phase inversion, branched polymer structures, interpenetrating networks, and combinations of anions with highly delocalized charge and amorphous polymers. However, the large corpus of literature on polymer electrolytes, including dry, gel and composites, has not led to a commercially popular lithium polymer battery.…”