Schweiger, H. G. and Multerer, M. and Wietelmann, U. and Panitz, JC and Burgemeister, T. and Gores, Heiner J. (2005) NMR determination of trace water in lithium salts for battery electrolytes. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 152 (3). A622-A627. ISSN 0013-4651, 1945-7111
Full text not available from this repository. (Request a copy)Abstract
The Karl Fischer titration is the standard method for the determination of the water content in many materials. However, in particular cases, unwanted side reactions occur which leads to unacceptably large errors. We present here an nuclear magnetron resonance (NMR)-based method for the determination of trace impurities of water in a salt recently developed for lithium ion cells, i.e., lithium bis[1,2-oxalato(2-)-O,O']borate (LiBOB). The method, which may be applied to many lithium salts used in batteries, is able to determine traces of water in the salt down to similar to 6 ppm. Errors depend strongly on the salt studied. Deviations from expected values obtained by standard addition were 28% for LiBOB, 4% for LiPF6, and 6% for LiClO4 . Using the error propagation law, we estimated an overall error of about 10%. (c) 2005 The Electrochemical Society. [DOI: 10.1149/1.1859693] All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | H-1-NMR CHEMICAL-SHIFTS; NOBLE-METAL ELECTRODES; ELECTROCHEMICAL-BEHAVIOR; AQUEOUS-SOLUTIONS; LIBOB; SOLVENTS; ION; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Heiner Jakob Gores Chemistry and Pharmacy > Central Analytical Services |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Jun 2021 08:52 |
| Last Modified: | 08 Jun 2021 08:52 |
| URI: | https://pred.uni-regensburg.de/id/eprint/36752 |
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