Atomic/Molecular Layer Deposition of Lithium Terephthalate Thin Films as High Rate Capability Li-Ion Battery Anodes

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2016
Major/Subject
Mcode
Degree programme
Language
en
Pages
6
1276-1281
Series
NANO LETTERS, Volume 16, issue 2
Abstract
We demonstrate the fabrication of high-quality electrochemically active organic lithium electrode thin films by the currently strongly emerging combined atomic/molecular layer deposition (ALD/MLD) technique using lithium terephthalate, a recently found anode material for lithium-ion battery (LIB), as a proof-of-the-concept material. Our deposition process for Li-terephthalate is shown to well comply with the basic principles of ALD-type growth including the sequential self-saturated surface reactions, a necessity when aiming at micro-LIB devices with three-dimensional architectures. The as-deposited films are found crystalline across the deposition temperature range of 200-280 degrees C, which is a trait highly desired for an electrode material but rather unusual for hybrid inorganic-organic thin films. Excellent rate capability is ascertained for the Li-terephthalate films with no conductive additives required. The electrode performance can be further enhanced by depositing a thin protective LiPON solid-state electrolyte layer on top of Li-terephthalate; this yields highly stable structures with capacity retention of over 97% after 200 charge/discharge cycles at 3.2 C.
Description
| openaire: EC/FP7/339478/EU//LAYERENG-HYBMAT
Keywords
Atomic layer deposition, molecular layer deposition, thin film battery, organic electrode, GROWTH
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Citation
Nisula , M & Karppinen , M 2016 , ' Atomic/Molecular Layer Deposition of Lithium Terephthalate Thin Films as High Rate Capability Li-Ion Battery Anodes ' , Nano Letters , vol. 16 , no. 2 , pp. 1276-1281 . https://doi.org/10.1021/acs.nanolett.5b04604