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Enabling high areal capacity for Co-free high voltage spinel materials in next-generation Li-ion batteries

Journal Article · · Journal of Power Sources
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  1. Univ. of California, San Diego, CA (United States)
  2. Army Research Lab., Adelphi, MD (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Univ. of Texas, Austin, TX (United States)
+ Show Author Affiliations
The rapidly growing technological demand for lithium-ion batteries has prompted the development of novel cathode materials with high energy density, low cost, and improved safety. High voltage spinel, LiNi0.5Mn1.5O4 (LNMO), is one of the most promising candidates yet to be commercialized. The two primary obstacles for this material are the inferior electronic conductivity and fast capacity degradation in full cells due to the high operating voltage. By systematically addressing these limitations, we successfully develop a thick LNMO electrode with areal capacity loadings up to 3 mAh·cm–2. The optimized thick electrode is paired with a commercial graphite anode at both the coin cell and pouch cell level, achieving a full cell capacity retention as high as 72% and 78%, respectively, after 300 cycles. We attribute this superior cycling stability to careful optimizations of cell components and testing conditions, with a specific focus improving electronic conductivity and high voltage compatibility. These results suggest precise control of materials quality, electrode architecture and electrolyte optimization can soon support the development of a cobalt-free battery system based on a thick LNMO cathode (>4 mAh·cm2), which will eventually meet the needs of next-generation Li-ion batteries with reduced cost, improved safety, and assured sustainability.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Univ. of California San Diego, La Jolla, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
Grant/Contract Number:
AC02-05CH11231; EE0008442
OSTI ID:
1826540
Alternate ID(s):
OSTI ID: 1640280
OSTI ID: 1969443
Journal Information:
Journal of Power Sources, Journal Name: Journal of Power Sources Vol. 473; ISSN 0378-7753
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

On the electrochemical properties of the Fe–Ti doped LNMO material LiNi 0.5 Mn 1.37 Fe 0.1 Ti 0.03 O 3.95 text January 2022

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Related Subjects

25 ENERGY STORAGE
Cobalt-free Cathode
Full Cell Cycling
High Voltage Spinel
LiNi0.5Mn1.5O4
Thick Electrode