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Constructing O2/O3 homogeneous hybrid stabilizes Li-rich layered cathodes

Journal Article · · Energy Storage Materials
 [1];  [2];  [3];  [4];  [4];  [1];  [1];  [1];  [1];  [5];  [6];  [1];  [1];  [1];  [4];  [3]
  1. Harbin Institute of Technology (China)
  2. Harbin Institute of Technology (China); Tianjin Univ. (China)
  3. Tianjin Univ. (China)
  4. City Univ. of Hong Kong (China)
  5. Suzhou Nuclear Power Research Institute Co., Ltd. (China)
  6. Argonne National Lab. (ANL), Argonne, IL (United States)
+ Show Author Affiliations
With the advantages of high energy density and low manufacture cost, lithium-rich layered oxides (LLOs), typically with a layered O3-type structure, are regarded as promising cathodes for lithium-ion batteries (LIBs), but their broad usages are hindered by severe voltage decay over cycling. Although recent progress in O2-type LLOs has aroused interest for their less voltage decay, the critical barrier of unsatisfactory capacity retention has not been overcome yet. In this work, to tackle these handicaps, we design a new type of LLO (O2/O3-type LLO) with a homogeneous hybrid structure, where the O2 and O3 lattice stacking sequences are arranged alternatively. Benefitting from this novel O2/O3 hybrid structure, the designed material shows greatly improved voltage and capacity stability than that of pure O2- and O3-type LLOs. Revealed by in-situ synchrotron X-ray diffraction and operando differential electrochemical mass spectra, the O2/O3-hybrid LLO cathode shows a more reversible structural evolution, smaller volume change and suppressed oxygen loss during the electrochemical processes. Our approach has initiated a new way to reduce the capacity and voltage decay of LLOs, which endows great promise to the development of high-energy-density LIBs.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
City University of Hong Kong; National Natural Science Foundation of China (NSFC); Science, Technology and Innovation Commission of Shenzhen Municipality; Shenzhen Stable Supporting Fund; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1902733
Journal Information:
Energy Storage Materials, Journal Name: Energy Storage Materials Vol. 51; ISSN 2405-8297
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

25 ENERGY STORAGE
In-situ X-ray diffraction
Li-ion batteries
Li-rich layered cathodes
O2/O3 hybrid
Oxygen stacking