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
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Univ. of Illinois, Chicago, IL (United States)
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 Laboratory (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, Journal Name: ACS Applied Energy Materials Journal Issue: 7 Vol. 2; ISSN 2574-0962
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
An Approach for Pre-Lithiation of Li 1+ x Ni 0.5 Mn 1.5 O 4 Cathodes Mitigating Active Lithium Loss
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journal | January 2019 |
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