Journal
ACS APPLIED ENERGY MATERIALS
Volume 2, Issue 9, Pages 6170-6175Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.9b01503
Keywords
lithium-ion battery; solid-state battery; cathode; zero-strain; lithiated spinel; aluminum substitution
Funding
- Office of Vehicle Technologies of the U.S. Department of Energy
- DOE Office of Science [DE-AC02-06CH11357]
- Argonne, a U.S. Department of Energy Office of Science laboratory [DE-AC02-06CH11357]
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We report the discovery of a new zero-strain cathode, LiCo1-xAlxO2 (0 < x <= 0.5), which has a lithiated spinel structure synthesized at low temperature (LT). Lithiated spinel LiCo1-xAlxO2 operates at the highest average potential (similar to 3.7 V vs Li) with the lowest volume change (AV <= 0.02%) ever reported for a zero-strain lithium electrode. Unlike other zero-strain spinel materials such as Li4Ti5O12 and LiRh2O4 that undergo a reversible two-phase reaction, lithiated spinel LiCo1-xAlO2 electrodes operate by a single-phase process. The study opens the door to the design of a new family of zero-strain materials that can be used as a stable cathode for all-solid-state batteries.
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