Atomic layer deposition and first principles modeling of glassy Li3BO3?Li2CO3 electrolytes for solid-state Li metal batteries

Title
Atomic layer deposition and first principles modeling of glassy Li3BO3?Li2CO3 electrolytes for solid-state Li metal batteries
Authors
류승호Eric KazyakKuan-Hung ChenAndrew L. DavisAdrian J. SanchezJose LassoAshley R. BielinskiTravis ThompsonJeff SakamotoDonald J. SiegelNeil P. Dasgupta
Issue Date
2018-10
Publisher
Journal of materials chemistry. A, Materials for energy and sustainability
Citation
VOL 6, NO 40-19437
Abstract
Thin-film lithium solid electrolytes can serve as passivation layers, interfacial coatings, and enable 3D solid-state batteries. Here we present an Atomic Layer Deposition (ALD) process for synthesis of amorphous lithium borate-carbonate (LBCO) films. These films exhibit ionic conductivities up to 2.2 × 10&#8722; 6 S cm&#8722; 1, six times greater than previously reported for any ALD solid electrolyte. First principles calculations trace the high conductivity to contributions from enhanced rotational motion of the carbonate and borate anions achieved by precise control of Li and C content by ALD. The high conductivity, coupled with a wide band gap and electrochemical stability window, leads to a total area specific resistance (ASR) of <5 Ω cm2 for a 100 nm thick electrolyte and an ionic transference number >0.9999 from 0&#8211; 6 volts vs. Li metal. The LBCO ALD solid electrolyte exhibits stability upon exposure to air, and in contact with both Li metal anodes and cathode materials. Thin-film full cells containing Li metal electrodes exhibit high coulombic efficiency for over 150 cycles with no capacity fading. These characteristics make glassy LBCO a promising new material for solid-state Li metal batteries.
URI
http://pubs.kist.re.kr/handle/201004/68959
ISSN
2050-7488
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE