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Title: High Voltage Operation of Ni‐Rich NMC Cathodes Enabled by Stable Electrode/Electrolyte Interphases

Journal Article · · Advanced Energy Materials
 [1];  [2];  [3];  [2];  [2];  [2];  [3];  [3];  [2];  [4]; ORCiD logo [2]
  1. Energy and Environment Directorate Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99354 USA, School of Energy Research Xiamen University Xiamen Fujian 361005 China
  2. Energy and Environment Directorate Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99354 USA
  3. Environmental Molecular Sciences Laboratory Pacific Northwest National Laboratory 3335 Innovation Boulevard Richland WA 99354 USA
  4. School of Energy Research Xiamen University Xiamen Fujian 361005 China, State Key Lab of Physical Chemistry of Solid Surfaces, and Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China
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Abstract The lithium (Li) metal battery (LMB) is one of the most promising candidates for next‐generation energy storage systems. However, it is still a significant challenge to operate LMBs with high voltage cathodes under high rate conditions. In this work, an LMB using a nickel‐rich layered cathode of LiNi 0.76 Mn 0.14 Co 0.10 O 2 (NMC76) and an optimized electrolyte [0.6 m lithium bis(trifluoromethanesulfonyl)imide + 0.4 m lithium bis(oxalato)borate + 0.05 m LiPF 6 dissolved in ethylene carbonate and ethyl methyl carbonate (4:6 by weight)] demonstrates excellent stability at a high charge cutoff voltage of 4.5 V. Remarkably, these Li||NMC76 cells can deliver a high discharge capacity of >220 mA h g −1 (846 W h kg −1 ) and retain more than 80% capacity after 1000 cycles at high charge/discharge current rates of 2C/2C (1C = 200 mA g −1 ). This excellent electrochemical performance can be attributed to the greatly enhanced structural/interfacial stability of both the Ni‐rich NMC76 cathode material and the Li metal anode using the optimized electrolyte.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐AC02‐05CH11231
OSTI ID:
1430586
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Vol. 8 Journal Issue: 19; ISSN 1614-6832
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 247 works
Citation information provided by
Web of Science

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