Atomic/molecular layer deposition and electrochemical performance of dilithium 2-aminoterephthalate
Loading...
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2020-02-07
Major/Subject
Mcode
Degree programme
Language
en
Pages
9
Series
Dalton Transactions, Volume 49, issue 5, pp. 1591-1599
Abstract
Control of the redox potential of lithium terephthalate Li2TP anode material is demonstrated by functionalizing its terephthalate backbone with an electron-donating amino group; this lowers - as intended - the redox potential of Li2TP by 0.14 V. The two Li-organic electrode materials, Li2TP and Li2TP-NH2, are fabricated as crystalline thin films from gaseous precursors using the atomic/molecular layer deposition (ALD/MLD) technique. The amino-functionalized material possesses a previously unknown crystal structure, addressed here by applying the USPEX evolutionary algorithm for the structure prediction and then LeBail fitting of the experimental XRD pattern based on the predicted structure model. The ALD/MLD fabrication yields in situ lithiated active electrode materials without any conductive additivies or binders and thus allows a straightforward evaluation of their intrinsic electrochemical properties. Comparison between Li2TP and its amino-functionalized derivative reveals inferior capacity retention and rate capability characteristics for the latter, which somewhat counterveils the pros-and-cons balance between the two Li-organic electrode materials. From galvanostatic cycling experiments and post-mortem XRD and SEM analysis, the issue with Li2TP-NH2 is revealed to be in the morphology changes occurring during the discharge/charge cycling.Description
| openaire: EC/FP7/339478/EU//LAYERENG-HYBMAT
Keywords
ORGANIC ELECTRODE MATERIALS, ANODE MATERIAL, CRYSTAL-STRUCTURE, THIN-FILMS, ION, TEREPHTHALATE, FRAMEWORK, BATTERIES, NA2C8H4O4
Other note
Citation
Heiska, J, Nisula, M, Rautama, E-L, Karttunen, A J & Karppinen, M 2020, ' Atomic/molecular layer deposition and electrochemical performance of dilithium 2-aminoterephthalate ', Dalton Transactions, vol. 49, no. 5, pp. 1591-1599 . https://doi.org/10.1039/c9dt04572d