Solvothermal synthesis of Li–Al layered double hydroxides and their electrochemical performance

Wei, Jinbo; Gao, Zan; Song, Yifan; Yang, Wanlu; Wang, Jun; Li, Zhanshuang; Mann, Tom; Zhang, Milin; Liu, Lianhe

doi:10.1016/j.matchemphys.2012.12.005

Cited by 30 publications

(4 citation statements)

References 47 publications

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“…The higher the lithium ion concentration, the sharper the diffraction peak, which indicated that the crystallinity of LiAl-LDHs-1, LiAl-LDHs-2, and LiAl-LDHs-3 decreased in turn. As shown in Figure 2, the crystal growth of LiAl-LDHs was complete and displayed a hexagonal sheet morphology, which is characteristic of LDHs, and the crystallization is consistent with the XRD pattern [27,28]. The 27 Al NMR spectra (Figure S1) of LiAl-LDHs-1 revealed a chemical shift of 27 Al as 6.39 ppm; that is, the Al environment was six-coordinated Al [29].…”

Section: Resultsmentioning

confidence: 66%

Highly Efficient Lithium Recovery from Pre-Synthesized Chlorine-Ion-Intercalated LiAl-Layered Double Hydroxides via a Mild Solution Chemistry Process

et al. 2019

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Lithium extraction from salt lake brine is critical for satisfying the increasing demand of a variety of lithium products. We report lithium recovery from pre-synthesized LiAl-layered double hydroxides (LDHs) via a mild solution reaction. Lithium ions were released from solid LiAl-LDHs to obtain a lithium-bearing solution. The LiAl-LDHs phase was gradually transformed into a predominantly Al(OH)3 phase with lithium recovery to the aqueous solution. The lithium recovery percentage and the concentration of the lithium-bearing solution were dependent on the crystallinity of LiAl-LDHs, the initial concentration of the LiAl-LDHs-1 slurry, the reaction temperature, and the reaction time. Under optimized conditions, the lithium recovery reached 86.2% and the Li+ concentration in the filtrate is 141.6 mg/L. Interestingly, no aluminum ions were detected in the filtrate after solid–liquid separation with high crystallinity LiAl-LDHs, which indicated the complete separation of lithium and aluminum in the liquid and solid phases, respectively. The 27Al NMR spectra of the solid products indicate that lithium recovery from the lattice vacancies of LiAl-LDHs affects the AlO6 coordination in an octahedral configuration of the ordered Al(OH)3 phase. The XPS O 1s spectra show that the Oad peak intensity increased and the OL peak intensity decreased with the increasing lithium recovery, which indicated that the Al-OH bond was gradually formed and the metal–oxygen–metal bond was broken.

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Section: Resultsmentioning

confidence: 66%

Highly Efficient Lithium Recovery from Pre-Synthesized Chlorine-Ion-Intercalated LiAl-Layered Double Hydroxides via a Mild Solution Chemistry Process

et al. 2019

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“…Upon rehydration the LDH is able to reconstruct its structure using its "memory effect" property [84] upon exposure to water and also intercalate new anions which were not present in the parent LDH [80]. Apart from these preparation procedures, other methods of synthesis do exist [85,86] and the interested reader is directed to the work of He et al [80]. LDHs also occur freely in nature.…”

Section: Preparation Methodsmentioning

confidence: 99%

Recent Advances on the Application of Layered Double Hydroxides in Concrete—A Review

et al. 2020

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The issue of chloride induced corrosion of reinforced concrete is a serious problem affecting infrastructure globally and causing huge economic losses. As such this issue has gained a considerable attention in the scientific community in the recent past. Layered Double Hydroxides (LDHs) have recently emerged as a new class of concrete-additives with a potential to increase the chloride resistance of concrete and mitigate corrosion. LDHs are clay like structures consisting of positively charged layers of cations with associated hydroxides and exchangeable anions in between the layers. Due to this charge balanced structure, LDHs possess the property of encapsulating an anion from the environment and replacing it with an exchangeable anion present in its layers. Potential applications include chloride entrapment in concrete and delivery of corrosion inhibiting anions. However, many versatile compositions of LDHs can be easily synthesized and their application as cement additives reach far beyond corrosion mitigation in concrete. This review presents a summary of recent advances on the applications of LDH in concrete. An extensive set of recently published literature has been critically reviewed and trends have been identified.

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“…In contrast to MgAl-LDHs, LiAl-layered double hydroxide (LiAl-LDHs) is a unique layered material composed of monovalent Li + and trivalent Al 3 + [33][34][35] . Lithium ions are embedded into lattice vacancies in the octahedral framework of Al(OH) 3 , yielding a positively-charged structure.…”

Section: Componentsmentioning

confidence: 99%

Highly efficient extraction of lithium from salt lake brine by LiAl-layered double hydroxides as lithium-ion-selective capturing material

Sun

Guo

et al. 2019

Journal of Energy Chemistry

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Solvothermal synthesis of Li–Al layered double hydroxides and their electrochemical performance

Cited by 30 publications

References 47 publications

Highly Efficient Lithium Recovery from Pre-Synthesized Chlorine-Ion-Intercalated LiAl-Layered Double Hydroxides via a Mild Solution Chemistry Process

Highly Efficient Lithium Recovery from Pre-Synthesized Chlorine-Ion-Intercalated LiAl-Layered Double Hydroxides via a Mild Solution Chemistry Process

Recent Advances on the Application of Layered Double Hydroxides in Concrete—A Review

Highly efficient extraction of lithium from salt lake brine by LiAl-layered double hydroxides as lithium-ion-selective capturing material

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