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Lithium intercalation and deintercalation of thermally decomposed LiAl2-layered double hydroxides
Abstract Lithium aluminum layered double hydroxide (LiAl2-LDH) nanocrystals on aluminum metal substrates were synthesized to adsorb lithium in aqueous solutions and utilized to collect lithium in aqueous media. LiAl2-LDH is transformed at 300 °C into a mixture of LiCl and Li-Al-O-OH; dissolved lithium in deionized water at 25 °C reached 85% compared to the intercalated lithium content. Amorphous Li-Al-O-OH residues on the aluminum metal substrate were capable of adsorbing lithium ions back to the lithium rich LiAl2-LDH phase. Thermal treatment followed by additional lithium intercalation suggested a topotactic reaction of lithium ions between amorphous Li-Al-O-OH and LiAl2-LDH. We also proposed a facile recycling method of lithium ions by peeling off the Li-Al-O-OH layer to save the aluminum metal substrate.
Highlights A quantitative analyses of new lithium deintercalation method are presented. The thermal decomposition of LixAl2-LDH is utilized. Facile regeneration method of LixAl2-LDH layer is developed. LixAl2-LDH exhibits outstanding recycling performance in lithium recovery.
Lithium intercalation and deintercalation of thermally decomposed LiAl2-layered double hydroxides
Abstract Lithium aluminum layered double hydroxide (LiAl2-LDH) nanocrystals on aluminum metal substrates were synthesized to adsorb lithium in aqueous solutions and utilized to collect lithium in aqueous media. LiAl2-LDH is transformed at 300 °C into a mixture of LiCl and Li-Al-O-OH; dissolved lithium in deionized water at 25 °C reached 85% compared to the intercalated lithium content. Amorphous Li-Al-O-OH residues on the aluminum metal substrate were capable of adsorbing lithium ions back to the lithium rich LiAl2-LDH phase. Thermal treatment followed by additional lithium intercalation suggested a topotactic reaction of lithium ions between amorphous Li-Al-O-OH and LiAl2-LDH. We also proposed a facile recycling method of lithium ions by peeling off the Li-Al-O-OH layer to save the aluminum metal substrate.
Highlights A quantitative analyses of new lithium deintercalation method are presented. The thermal decomposition of LixAl2-LDH is utilized. Facile regeneration method of LixAl2-LDH layer is developed. LixAl2-LDH exhibits outstanding recycling performance in lithium recovery.
Lithium intercalation and deintercalation of thermally decomposed LiAl2-layered double hydroxides
Lee, Yongju (author) / Jung, Duk-Young (author)
Applied Clay Science ; 228
2022-06-27
Article (Journal)
Electronic Resource
English
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