Low‐Cost Self‐Assembled Oxide Separator for Rechargeable Batteries
Abstract
Abstract Rechargeable battery cells having a liquid electrolyte require a separator permeable to the electrolyte between the two electrodes. Because the electrodes change their volume during charge and discharge, the porous separators are flexible polymers with an electronic energy gap E g large enough for the Fermi levels of the two electrodes to be within it. In this work, a porous film of self‐assembled SiO 2 nanoparticles is developed as the separator for a Li‐ion battery with a liquid electrolyte. This coating does not require the plasticity of a polymer membrane and has the required large E g . If adsorbed water is removed from the SiO 2 surface, the nanoparticles bond to one another and to an oxide cathode to form a plastic self‐assembling porous layer into which the liquid electrolyte can penetrate. The Li‐ion batteries with a LiCoO 2 cathode coated with SiO 2 as a separator show similar performance to cells with a traditional polypropylene separator and improved cyclability with a reduced volume of liquid electrolyte owing to the electrolyte wetting properties of the SiO 2 nanoparticles. The SiO 2 nanoparticles are easy to prepare, cheap, and environmentally friendly.
- Authors:
-
[1];
[1];
[1]
- Materials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin Austin TX 78712 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1529653
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Advanced Functional Materials
- Additional Journal Information:
- Journal Name: Advanced Functional Materials Journal Volume: 29 Journal Issue: 35; Journal ID: ISSN 1616-301X
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Grundish, Nicholas S., Amos, Charles D., Agrawal, Ankit, Khani, Hadi, and Goodenough, John B.. Low‐Cost Self‐Assembled Oxide Separator for Rechargeable Batteries. Germany: N. p., 2019.
Web. doi:10.1002/adfm.201903550.
Grundish, Nicholas S., Amos, Charles D., Agrawal, Ankit, Khani, Hadi, & Goodenough, John B.. Low‐Cost Self‐Assembled Oxide Separator for Rechargeable Batteries. Germany. https://doi.org/10.1002/adfm.201903550
Grundish, Nicholas S., Amos, Charles D., Agrawal, Ankit, Khani, Hadi, and Goodenough, John B.. Wed .
"Low‐Cost Self‐Assembled Oxide Separator for Rechargeable Batteries". Germany. https://doi.org/10.1002/adfm.201903550.
@article{osti_1529653,
title = {Low‐Cost Self‐Assembled Oxide Separator for Rechargeable Batteries},
author = {Grundish, Nicholas S. and Amos, Charles D. and Agrawal, Ankit and Khani, Hadi and Goodenough, John B.},
abstractNote = {Abstract Rechargeable battery cells having a liquid electrolyte require a separator permeable to the electrolyte between the two electrodes. Because the electrodes change their volume during charge and discharge, the porous separators are flexible polymers with an electronic energy gap E g large enough for the Fermi levels of the two electrodes to be within it. In this work, a porous film of self‐assembled SiO 2 nanoparticles is developed as the separator for a Li‐ion battery with a liquid electrolyte. This coating does not require the plasticity of a polymer membrane and has the required large E g . If adsorbed water is removed from the SiO 2 surface, the nanoparticles bond to one another and to an oxide cathode to form a plastic self‐assembling porous layer into which the liquid electrolyte can penetrate. The Li‐ion batteries with a LiCoO 2 cathode coated with SiO 2 as a separator show similar performance to cells with a traditional polypropylene separator and improved cyclability with a reduced volume of liquid electrolyte owing to the electrolyte wetting properties of the SiO 2 nanoparticles. The SiO 2 nanoparticles are easy to prepare, cheap, and environmentally friendly.},
doi = {10.1002/adfm.201903550},
journal = {Advanced Functional Materials},
number = 35,
volume = 29,
place = {Germany},
year = {2019},
month = {6}
}
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https://doi.org/10.1002/adfm.201903550
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