Operando NMR and XRD study of chemically synthesized LiCx oxidation in a dry room environment

Sacci, Robert L.; Gill, Lance W.; Hagaman, Edward W.; Dudney, Nancy J.

doi:10.1016/j.jpowsour.2015.04.035

Title: Operando NMR and XRD study of chemically synthesized LiCx oxidation in a dry room environment

Journal Article · Tue Apr 07 00:00:00 EDT 2015 · Journal of Power Sources

DOI:https://doi.org/10.1016/j.jpowsour.2015.04.035· OSTI ID:1210129

Sacci, Robert L. ^[1]; Gill, Lance W. ^[1]; Hagaman, Edward W. ^[1]; Dudney, Nancy J. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

We test the stability of pre-lithiated graphite anodes for Li-ion batteries in a dry room battery processing room. The reaction between LiCx and laboratory air was followed using operando NMR and x-ray diffraction as these methods are sensitive to change in Li stoichiometry in graphite. There is minimal reactivity between LiC₆ and N₂, CO₂ or O₂; however, LiC₆ reacts with moisture to form lithium (hydr)oxide. The reaction rate follows zero-order kinetics with respects to intercalated lithium suggesting that lithium transport through the graphite is fast. The reaction mechanism occurs by sequential formation of higher stages LiC₁₂, then LiC₁₈, and then LiC₂₄ as the hydrolysis proceeds to the formation of Li_xOH_y and graphite end products. Slowing down the formation rate of the Li_xOH_y passivation layer stabilizes of the higher stages.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1210129

Alternate ID(s):: OSTI ID: 1253050

Journal Information:: Journal of Power Sources, Vol. 287, Issue C; ISSN 0378-7753

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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Title: Operando NMR and XRD study of chemically synthesized LiCx oxidation in a dry room environment

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