Operando NMR and XRD study of chemically synthesized LiCx oxidation in a dry room environment
- 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 LixOHy and graphite end products. Slowing down the formation rate of the LixOHy passivation layer stabilizes of the higher stages.
- 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
Web of Science
In‐situ structural characterizations of electrochemical intercalation of graphite compounds
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journal | October 2019 |
Lithium intercalation into bilayer graphene
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journal | January 2019 |
Real-time observations of lithium battery reactions—operando neutron diffraction analysis during practical operation
|
journal | June 2016 |
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