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Title: Local structure adaptability through multi cations for oxygen redox accommodation in Li-Rich layered oxides

Journal Article · · Energy Storage Materials
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  1. Chinese Academy of Sciences (CAS), Beijing (China)
  2. Univ. of California, San Diego, CA (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Chinese Academy of Sciences (CAS), Beijing (China); Songshan Lake Materials Lab., Guangdong (China)

Stable lattice oxygen redox (l-OR) is the key enabler for achieving attainable high energy density in Li-rich layered oxide cathode materials for Li-ion batteries. However, the unique local structure response to oxygen redox in these materials, resulting in energy inefficiency and hysteresis, still remains elusive, preventing their potential applications. By combining the state-of-the-art neutron pair distribution function with crystal orbital overlap analysis, we directly observe the distinct local structure adaption originated from the potential O–O chemical bonds. The structure adaptability is optimized based on the nature of multi transition metals in our model compound Li1.2Ni0.13Mn0.54Co0.13O2, which accommodates the oxygen redox and at the same time preserves the global layered structure. Furthermore, these findings not only advance the understanding of l-OR, but also provide new perspectives in the rational design of high-energy-density cathode materials with reversible and stable l-OR.

Research Organization:
Univ. of California, San Diego, CA (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); National Materials Genome Project
Grant/Contract Number:
EE0007744; AC02-05CH11231; AC05-00OR22725; KC040602; 2016YFB0100100; 2016YFB0100106; 11675255; 51502334; 51822211; SC0012704
OSTI ID:
1770706
Alternate ID(s):
OSTI ID: 1557714; OSTI ID: 1704018
Report Number(s):
BNL-211950-2019-JAAM
Journal Information:
Energy Storage Materials, Vol. 24; ISSN 2405-8297
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 92 works
Citation information provided by
Web of Science

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Cited By (2)

Reversible Anionic Redox Activities in Conventional LiNi 1/3 Co 1/3 Mn 1/3 O 2 Cathodes journal March 2020
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Figures / Tables (6)