التفاصيل البيبلوغرافية
| العنوان: |
Lithium Salt Diffusion in Diblock Copolymer Electrolyte Using Fourier Transform Infrared Spectroscopy. |
| المؤلفون: |
Kim K; Chemical and Biomedical Engineering Department, Florida Agricultural and Mechanical University-Florida State University College of Engineering, 2525 Pottsdamer Street, Tallahassee, Florida 32310, United States.; Aero-Propulsion, Mechatronics & Energy Center, Florida State University, 2003 Levy Avenue, Tallahassee, Florida 32310, United States., Hallinan DT Jr; Chemical and Biomedical Engineering Department, Florida Agricultural and Mechanical University-Florida State University College of Engineering, 2525 Pottsdamer Street, Tallahassee, Florida 32310, United States.; Aero-Propulsion, Mechatronics & Energy Center, Florida State University, 2003 Levy Avenue, Tallahassee, Florida 32310, United States. |
| المصدر: |
The journal of physical chemistry. B [J Phys Chem B] 2020 Mar 12; Vol. 124 (10), pp. 2040-2047. Date of Electronic Publication: 2020 Mar 03. |
| نوع المنشور: |
Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
| اللغة: |
English |
| بيانات الدورية: |
Publisher: American Chemical Society Country of Publication: United States NLM ID: 101157530 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-5207 (Electronic) Linking ISSN: 15205207 NLM ISO Abbreviation: J Phys Chem B Subsets: PubMed not MEDLINE; MEDLINE |
| أسماء مطبوعة: |
Original Publication: Washington, D.C. : American Chemical Society, c1997- |
| مستخلص: |
The diffusion of a lithium salt through a diblock copolymer electrolyte was studied using vibrational spectroscopy. Lithium bis-trifluoromethylsulfonimide (LiTFSI) was dissolved in a lamellar-structured, high-molecular-weight polystyrene-poly(ethylene oxide) diblock copolymer at various concentrations (0-4.51 mol LiTFSI /kg PEO ). The diffusion coefficient of LiTFSI was determined from time-resolved Fourier Transform infrared spectroscopy attenuated total reflectance (FTIR-ATR) as a function of the salt concentration. By the application of the Beer-Lambert law, FTIR-ATR was used to detect concentration changes. Mutual diffusion was driven by putting in contact two polymer electrolyte membranes with different salt concentrations. Thus, mutual diffusion coefficients were obtained without the influence of electric fields or electrode interfaces. The accuracy of the simple experimental approach and straightforward analysis was validated by comparison to diffusion coefficients reported from measurements in electrochemical cells. Both methods yield mutual diffusion coefficients of lithium salt that are only weakly (and nonmonotonically) dependent on salt concentration. There is some indication in the spectra that there exist two populations of salt with different dissociation states. This could explain the observed nonmonotonic concentration dependence of the mutual diffusion coefficient of the salt. This hypothesis will be examined quantitatively with complementary measurements in future work. |
| تواريخ الأحداث: |
Date Created: 20200220 Date Completed: 20200902 Latest Revision: 20200902 |
| رمز التحديث: |
20240628 |
| DOI: |
10.1021/acs.jpcb.9b11446 |
| PMID: |
32073855 |
| قاعدة البيانات: |
MEDLINE |
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