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Title: Nanocrystal heterostructures of LiCoO2 with conformal passivating shells

Journal Article · · Nanoscale
DOI: https://doi.org/10.1039/c7nr08612a · OSTI ID:1462745
 [1];  [2];  [3];  [3];  [4];  [5];  [2]; ORCiD logo [1]
  1. Univ. of Chicago, IL (United States). Dept. of Chemistry
  2. Univ. of Chicago, IL (United States). Dept. of Physics
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS) and X-ray Science Division
  5. Univ. of Chicago, IL (United States). Dept. of Chemistry; Chungnam National Univ., Daejeon (Korea, Republic of). School of Materials Science and Engineering

Stabilization of electrode–electrolyte interfaces is required to increase the energy stored in battery electrodes. Introducing redox-inactive ions on the electrode surface minimizes deleterious side reactions without affecting the bulk properties. A synthetic challenge exists to grow such layers conformally at each primary particle, to fully passivate interfaces that are buried in the final electrode architecture. The development of methods of sequential colloidal growth of complex oxides and overlayers, enabled by surfactant interactions, would provide novel means to advance toward this goal. For this, nanocrystals composed of LiCoO2, a commercially relevant material for high energy devices, were grown with a shell enriched in Al3+, deposited conformally through a one-pot colloidal synthetic method. The effects of synthetic conditions on the composition of the Al-rich shell and the corresponding electrochemical performance were investigated. The modified nanocrystals showed enhanced electrochemical properties, while maintaining carrier transport.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357; CBET-1605126; DMR-0959470
OSTI ID:
1462745
Alternate ID(s):
OSTI ID: 1434153
Journal Information:
Nanoscale, Vol. 10, Issue 15; ISSN 2040-3364
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

TiO 2 -coated LiCoO 2 electrodes fabricated by a sputtering deposition method for lithium-ion batteries with enhanced electrochemical performance journal January 2019
Synthesis and Characterization of Core-Shell Nanocrystals of Co-Rich Cathodes journal October 2019

Figures / Tables (7)