Exploring Lithium-Cobalt-Nickel Oxide Spinel Electrodes for ≥3.5 V Li-Ion Cells
- Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division
- Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering, NUANCE Center
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab.
- Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering
Some recent reports have indicated that a manganese oxide spinel component, when embedded in a relatively small concentration in layered xLi2MnO3center dot(1-x)LiMO2 (M = Ni, Mn, or Co) electrode systems, can act as a stabilizer that increases their capacity, rate capability, cycle life, and first-cycle efficiency. Our findings prompted us to explore the possibility of exploiting lithiated cobalt oxide spinel stabilizers by taking advantage of (1) the low mobility of cobalt ions relative to that of manganese and nickel ions in close-packed oxides and (2) their higher potential (similar to 3.6 V vs Li0) relative to manganese oxide spinels (similar to 2.9 V vs Li0) for the spinel-to-lithiated spinel electrochemical reaction. In particular, we revisited the structural and electrochemical properties of lithiated spinels in the LiCo1-xNixO2 (0 <= x <= 0.2) system, first reported almost 25 years ago, by means of high-resolution (synchrotron) X-ray diffraction, transmission electron microscopy, nuclear magnetic resonance spectroscopy, electrochemical cell tests, and theoretical calculations. These results provide a deeper understanding of the complexity of intergrown layered/lithiated spinel LiCo1-xNixO2 structures when prepared in air between 400 and 800 degrees C and the impact of structural variations on their electrochemical behavior. These structures, when used in low concentrations, offer the possibility of improving the cycling stability, energy, and power of high energy (>= 3.5 V) lithium-ion cells.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Electrical Energy Storage (CEES)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
- Grant/Contract Number:
- AC02-06CH11357; AC02-05CH11231
- OSTI ID:
- 1392304
- Journal Information:
- ACS Applied Materials and Interfaces, Vol. 8, Issue 41; ISSN 1944-8244
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Li 2 Ni 0.2 Co 1.8 O 4 having a spinel framework as a zero-strain positive electrode material for lithium-ion batteries
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journal | January 2019 |
The Effects of Trace Yb Doping on the Electrochemical Performance of Li‐Rich Layered Oxides
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journal | April 2019 |
First-Cycle Simulation for Li-Rich Layered Oxide Cathode Material x Li 2 MnO 3 ⋅ (1- x )Li M O 2 ( x = 0.4)
|
journal | January 2018 |
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