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A new anion receptor for improving the interface between lithium- and manganese-rich layered oxide cathode and the electrolyte

Journal Article · · Chemistry of Materials
 [1];  [2];  [2];  [2];  [2];  [3];  [4];  [2];  [2];  [3];  [5];  [6];  [5]
  1. Harbin Institute of Technology, Harbin (China); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Harbin Institute of Technology, Harbin (China)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
+ Show Author Affiliations
Surface degradation on cycled lithium-ion battery cathode particles is governed not only by intrinsic thermodynamic properties of the material but also, oftentimes more predominantly, by the side reactions with the electrolytic solution. A superior electrolyte inhibits these undesired side reactions on the cathode and at the electrolyte interface, which consequently minimizes the deterioration of the cathode surface. The present study investigates a new boron-based anion receptor, tris(2,2,2-trifluoroethyl)borate (TTFEB), as an electrolyte additive in cells containing a lithium- and manganese-rich layered oxide cathode, Li1.16Ni0.2Co0.1Mn0.54O2. Our electrochemical studies demonstrate that the cycling performance and Coulombic efficiency are significantly improved because of the additive, in particular, under elevated temperature conditions. Spectroscopic analyses revealed that the addition of 0.5 wt % TTFEB is capable of reducing the content of lithium-containing inorganic species within the cathode-electrolyte interphase layer and minimizing the reduction of tetravalent Mn4+ at the cathode surface. Furthermore, our work introduces a novel additive highly effective in improving lithium-ion battery performance, highlights the importance in preserving the surface properties of cathode materials, and provides new insights on the working mechanism of electrolyte additives.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515
OSTI ID:
1360187
Alternate ID(s):
OSTI ID: 1459389
Journal Information:
Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 5 Vol. 29; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Suppressing Surface Lattice Oxygen Release of Li-Rich Cathode Materials via Heterostructured Spinel Li 4 Mn 5 O 12 Coating journal May 2018
Phase Transformation of Lithium‐rich Oxide Cathode in Full Cell and its Suppression by Solid Electrolyte Interphase on Graphite Anode journal March 2020
Unsymmetrical fluorinated malonatoborate as an amphoteric additive for high-energy-density lithium-ion batteries journal January 2018

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