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Title: Lithium aluminum–layered double hydroxide chlorides (LDH): Formation enthalpies and energetics for lithium ion capture

Journal Article · · Journal of the American Ceramic Society
DOI:https://doi.org/10.1111/jace.16150· OSTI ID:1560502
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [2]; ORCiD logo [2];  [4];  [4];  [5]; ORCiD logo [3];  [4]; ORCiD logo [1]
  1. Univ. of California, Davis, CA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); The Univ. of Tennessee, Knoxville, TN (United States)
  4. Rutgers Univ., Piscataway, NJ (United States)
  5. Alger Alternative Energy, LLC, Brawley, CA (United States)
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Abstract Layered aluminum double hydroxide chloride sorbents, LiCl∙Al 2 ( OH ) 6 . nH 2 O, Li‐ LDH , have shown promising application in selective Li extraction from geothermal brines. Maintaining LiCl uptake capacity and retaining a long cycle life are critical to widespread application of sorbent materials. To elucidate the energetics of Li capture, enthalpies of LDH with different Li content have been measured by acid solution calorimetry. The formation enthalpies generally become less exothermic as the Li content increases, which indicates that Li intercalation destabilizes the structure, and the enthalpies seem to approach a limit after the Li content x = 2Li/Al exceeds 1. To improve stability, metal doping of the aluminum LDH structure with iron was performed. Introduction of a metal with greater electron density but a similar ionic radius was postulated to improve the stability of the LDH crystal structure. The calorimetric results from Fe‐doped LDH samples corroborate this as they are more exothermic than LDH ‐lacking Fe. This suggests that Fe doping is an effective way to stabilize the LDH phase.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1560502
Alternate ID(s):
OSTI ID: 1787126
Journal Information:
Journal of the American Ceramic Society, Vol. 102, Issue 5; ISSN 0002-7820
Publisher:
American Ceramic SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

References (20)

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Figures / Tables (8)

Table 1(p. 12)table Table 1
Table 2(p. 12)table Table 2
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Figure 4(p. 16)figure Figure 4
Figure 5(p. 17)figure Figure 5
Figure 6(p. 17)figure Figure 6

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
heat capacity
high‐temperature calorimetry
lithium aluminum hydroxide chloride
lithium extraction
sorbents