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Title: Strain Coupling of Conversion-type Fe 3O 4 Thin Films for Lithium Ion Batteries

Lithiation/delithiation induces significant stresses and strains into the electrodes for lithium ion batteries, which can severely degrade their cycling performance. Moreover, this electrochemically induced strain can interact with the local strain existing at solid–solid interfaces. It is not clear how this interaction affects the lithiation mechanism. The effect of this coupling on the lithiation kinetics in epitaxial Fe 3O 4 thin film on a Nb-doped SrTiO 3 substrate is investigated. In-situ and ex-situ transmission electron microscopy (TEM) results show that the lithiation is suppressed by the compressive interfacial strain. At the interface between the film and substrate, the existence of Li xFe 3O 4 rock-salt phase during lithiation consequently restrains the film from delamination. 2D phase-field simulation verifies the effect of strain. This work provides critical insights of understanding the solid–solid interfaces of conversion-type electrodes.
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [3] ;  [3] ;  [1] ;  [1] ;  [4] ; ORCiD logo [5]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Academia Sinica, Taipei (Taiwan). Inst. of Physics
  3. Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering
  4. Academia Sinica, Taipei (Taiwan). Inst. of Physics; National Chiao Tung Univ., Hsinchu (Taiwan). Dept. of Materials Science and Engineering, Dept. of Electrophysics
  5. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering
Publication Date:
Report Number(s):
BNL-113888-2017-JA
Journal ID: ISSN 1433-7851; R&D Project: 16060; 16060; KC0403020
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 56; Journal Issue: 27; Journal ID: ISSN 1433-7851
Publisher:
Wiley
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
29 ENERGY PLANNING, POLICY, AND ECONOMY; lithium ion battery; Strain Coupling; Fe3O4; Center for Functional Nanomaterials; conversion electrodes; lithiation; magnetite; strain; thin films
OSTI Identifier:
1362155
Alternate Identifier(s):
OSTI ID: 1378794