Unveiling interfacial dynamics and structural degradation of solid electrolytes in a seawater battery system

Abstract

Understanding the interfacial reaction between a solid electrolyte and reactive species is of vital importance for the development of various battery systems. In particular, the interaction between the solid electrolyte,...

Dual‐Use of Seawater Batteries for Energy Storage and Water Desalination

“…[52] Elemental sodium is highly abundant and frequently used as an electrode material, with a very high theoretical capacity of 1166 mAh g −1 . [43,[53][54][55][56] However, uncontrolled growth of sodium dendrites hinders safe battery operation, ruptures separators, and shortens the device lifetime while still exhibiting low Coulombic efficiency and battery performance. [57][58][59][60][61] Finally, light metals or alloy materials such as magnesium or aluminum promise access to a high theoretical specific capacity (Mg: 2200 mAh g −1 , Al: 2980 mAh g −1 ) and can be considered as possible electrodes as well.…”

“…The most often used membrane materials are the inorganic β″-Al 2 O 3 or sodium superionic conductor (NASICON) because of the high ion mobility and chemical stability. [54,88] A general issue of ceramic membranes is their mechanical brittleness, which imposes specific considerations onto seawater battery design and scalability.…”

“…[103,104] Many factors influence this behavior, such as the applied current density, which at high rates (2 mA cm −2 ) causes structural degradation with irreversible phase deformation and Na + extraction. [54] However, further detailed investigations need to be carried out Reproduced with permission. [216] Copyright 2020, Elsevier.…”

Improving ionic conductivity of von-Alpen-type NASICON ceramic electrolytes via magnesium doping

“…In recent years, new types of Na-based batteries based on advanced technologies have been proposed, such as all-solid-state Na batteries (ASS-SBs), hybrid sodium-air batteries (HSABs), and seawater batteries (SWBs) [8][9][10][11]. A key factor in realizing these new Nabased batteries is the development of solid electrolytes with high ionic conductivity and physicochemical/electrochemical stability [10,12,13].…”

Strong interfacial energetics between catalysts and current collectors in aqueous sodium–air batteries

“…The previous study attempted to minimize the overpotential using electrocatalysts and polymeric binders. 4,10,11…”