Crystallization of closo-borate electrolytes from solution enabling infiltration into slurry-casted porous electrodes for all-solid-state batteries

4 V room-temperature all-solid-state sodium battery enabled by a passivating cathode/hydroborate solid electrolyte interface

“…Extended cycling of sodium metal anodes at such current densities requires suppression of dendrite formation, e.g. by further reducing the interfacial resistance between sodium metal and the SE 9,11 and/or by applying even higher pressure, 8,12,41,64,65 although applying excessive pressure is not desirable for practical applications. 2 Fig.…”

Beyond Typical Electrolytes for Energy Dense Batteries

“…One key to this successful demonstration was the high oxidative stability of the electrolyte and accomplishing a good contact between the cathode (NaCrO 2 , theoretical capacity of 120 mAh/g) and the electrolyte (this was achieved by dissolving the latter in anhydrous methanol and dispersing NaCrO 2 into the solution, followed by drying in vacuum and heat treatment at 543 K in order to recrystallize the electrolyte). A follow-up study utilized isopropanol in order to recrystallize the electrolyte in the cathode at a lower temperature (453 K) [116].…”

“…Hydride electrolytes were also examined in batteries employing insertion and alloy anodes in liquid Mg batteries (i.e., good cycling was reported for Bi anode in a borohydride electrolyte [117]), solid-state lithium ion (i.e., nanostructured Bi 2 Te 3 /LiBH 4 composite [118] or Si with Li 2 B 12 H 12 [18]) and sodium ion batteries (Na 3 Sn anode in Na(B 12 H 12 ) 0.5 (B 10 H 10 ) 0.5 electrolyte) [116]. It is noted that performance losses due to challenges associated with anodes such as Sn and Si occurred and made it difficult to establish the potential advantage of hydrides in these batteries.…”

Electrolytes for Energy Dense Batteries

“…Follow up study recrystallized the electrolyte in the cathode from isopropanol at lower temperature (453 K). 118 Hydride electrolytes were also examined in batteries employing insertion and alloy anodes in liquid Mg batteries (i.e. good cycling was reported for Bi anode in a borohydride electroyte 119 ) and solid state lithium (i.e.…”

“…nanostructured Bi2Te3/LiBH4 composite 120 or Si with Li2B12H12 18 ) and sodium batteries (Na3Sn anode in Na(B12H12)0.5(B10H10)0.5 electrolyte). 118 Its noted that performance losses due to challenges associated with anodes such as Sn and Si occurred and made it difficult to establish the potential advantage of hydrides in these batteries.…”