High-Performance Layered Ni-Rich Cathode Materials Enabled by Stress-Resistant Nanosheets
Journal Article
·
· ACS Applied Materials and Interfaces
- City Univ. of Hong Kong, Kowloon (Hong Kong)
- X-Ray Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- City Univ. of Hong Kong, Kowloon (Hong Kong); National Institute for Materials Science (NIMS), Tsukuba (Japan)
- City Univ. of Hong Kong, Kowloon (Hong Kong); City Univ. of Hong Kong, Shenzhen (China)
Here, layered O3-type transition metal oxides are promising cathode candidates for high-energy-density Li-ion batteries. However, the structural instability at the highly delithiated state and low kinetics at the fully lithiated state are arduous challenges to overcome. Here, a facile approach is developed to make secondary particles of Ni-rich materials with nanosheet primary grains. Because the alignment of the primary grains reduces internal stress buildup within the particle during charge-discharge and provides straightforward paths for Li transport, the as-synthesized Ni-rich materials do not undergo cracking upon cycling with higher overall Li+ ion diffusion rates. Specifically, a LiNi0.75Co0.14Mn0.11O2 cathode with nanosheet grains delivers a high reversible capacity of 206 mAh g-1 and shows ultrahigh cycling stability, e.g., 98% capacity retention over 500 cycles in a full cell with a graphite anode.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 2404392
- Journal Information:
- ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Journal Issue: 6 Vol. 15; ISSN 1944-8244
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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