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Title: Liquid ammonia chemical lithiation: an approach for high energy and high voltage Si-graphite | Li1+xNi0.5Mn1.5O4 Li-ion batteries

Journal Article · · ACS Applied Energy Materials

Chemical lithiation using lithium metal dissolved in liquid ammonia is introduced for the first time as a viable, potentially scalable method to over-lithiate cathode materials, in this case, the 5V spinel Li1+xNi0.5Mn1.5O4. In this formula the value of x represents the amount of extra lithium inserted into the spinel. Such over-lithiated cathodes can subsequently be used to pre-lithiate high-energy anodes in a lithium-ion battery configuration during the first charge step. Lithiated 5V spinel Li1+xNi0.5Mn1.5O4 cathode materials prepared by this technique show higher first delithiation capacities, confirming the chemically inserted lithium is electrochemically active. Full cells with a Si-graphite anode and the Li1+xNi0.5Mn1.5O4 (x=0.62) cathode show a 23 % higher reversible capacity in the first cycle than LiNi0.5Mn1.5O4 baseline cells, and improved capacity retention. The extra, chemically inserted lithium therefore sacrificially compensates for the loss of lithium at the anode allowing higher utilization of the cathode capacity in following cycles.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1562664
Journal Information:
ACS Applied Energy Materials, Vol. 2, Issue 7; ISSN 2574-0962
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Cited By (1)

An Approach for Pre-Lithiation of Li 1+ x Ni 0.5 Mn 1.5 O 4 Cathodes Mitigating Active Lithium Loss journal January 2019