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| Title: | 13C NMR spectroscopic, CV, and conductivity studies of propylene carbonate-based electrolytes containing various lithium salts |
| Author (s): | Reddy, Prakash Smart, Marshall C. Chin, Keith B. Ratnakumar, Bugga V. Surampudi, Subbarao Hu, Jinbo Yan, Ping Prakash, G.K. Surya |
| Department/Lab Affiliations: | Center for Environmental Science and Technology (CEST) Chemistry |
| Keywords: | ionic conductivity voltammetry (chemical analysis) |
| Subject Terms: | Electrolytes. Lithium compounds. Nuclear magnetic resonance. Organic compounds. Oxidation. Reduction (Chemistry). |
| Issue Date: | 2005 |
| Publisher: | Electrochemical Society |
| Citation: | Reddy, V. Prakash, Marshall C. Smart, Keith B. Chin, Bugga V. Ratnakumar, Subbarao Surampudi, Jinbo Hu, Ping Yan, and G.K. Surya Prakash. "13C NMR Spectroscopic, CV, and Conductivity Studies of Propylene Carbonate-Based Electrolytes Containing Various Lithium Salts", Electrochem. Solid-State Lett., 8(6) A294-A298 (2005). |
| Abstract: | The ion-solvent and ion-ion interactions, oxidative electrochemical stabilities, and ionic mobilities of a series of lithium salt electrolytes with commonly used electrolyte solvents, propylene carbonate (PC) and dimethyl carbonate (DMC), have been studied using 13C nuclear magnetric resonance (NMR) spectroscopy, cyclic voltammetry (CV), and ionic conductivity measurements. The coordinating ability of PC toward lithium salts is significantly higher than that of DMC as shown by the relatively large deshielding of the carbonyl carbon of PC over that of DMC. We have also prepared a novel electrolyte, lithium tetrakis(trifluoromethanesulfonato)gallate [LiGa(OTf)4], and investigated its relative binding to PC by 13C NMR spectroscopy. The latter salt showed significant deshielding of the carbonyl carbon of PC compared to the other salts studied, including the conventional LiPF6. However, its conductivity is not enhanced to the same extent and is comparable to that of LiBF4. The CVs show their relative stabilities toward oxidation around 4.5 V and reduction close to lithium potentials. All electrolytes studied here have good electrochemical stability from 0.1 to 5.0 V vs. Li+/Li, and are suitable for applications in lithium-ion cells. |
| Type: | Article - Journal text |
| In Title: | Electrochemical and Solid State Letters |
| Copyright Notice: | Pre-print: archiving status unclear; Post-print: author can archive; This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. FULL COPYRIGHT INFORMATION: |
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| title | 13C NMR spectroscopic, CV, and conductivity studies of propylene carbonate-based electrolytes containing various lithium salts |
| contributor.author | Reddy, Prakash |
| contributor.author | Smart, Marshall C. |
| contributor.author | Chin, Keith B. |
| contributor.author | Ratnakumar, Bugga V. |
| contributor.author | Surampudi, Subbarao |
| contributor.author | Hu, Jinbo |
| contributor.author | Yan, Ping |
| contributor.author | Prakash, G.K. Surya |
| contributor.deptlab | Center for Environmental Science and Technology (CEST) |
| contributor.deptlab | Chemistry |
| contributor.sponsor | American Chemical Society Petroleum Research Fund |
| subject | ionic conductivity |
| subject | voltammetry (chemical analysis) |
| subject.LCSH | Electrolytes. |
| subject.LCSH | Lithium compounds. |
| subject.LCSH | Nuclear magnetic resonance. |
| subject.LCSH | Organic compounds. |
| subject.LCSH | Oxidation. |
| subject.LCSH | Reduction (Chemistry). |
| date.issued | 2005 |
| publisher | Electrochemical Society |
| identifier.citation | Reddy, V. Prakash, Marshall C. Smart, Keith B. Chin, Bugga V. Ratnakumar, Subbarao Surampudi, Jinbo Hu, Ping Yan, and G.K. Surya Prakash. "13C NMR Spectroscopic, CV, and Conductivity Studies of Propylene Carbonate-Based Electrolytes Containing Various Lithium Salts", Electrochem. Solid-State Lett., 8(6) A294-A298 (2005). |
| identifier.pub.URI | |
| description.abstract | The ion-solvent and ion-ion interactions, oxidative electrochemical stabilities, and ionic mobilities of a series of lithium salt electrolytes with commonly used electrolyte solvents, propylene carbonate (PC) and dimethyl carbonate (DMC), have been studied using 13C nuclear magnetric resonance (NMR) spectroscopy, cyclic voltammetry (CV), and ionic conductivity measurements. The coordinating ability of PC toward lithium salts is significantly higher than that of DMC as shown by the relatively large deshielding of the carbonyl carbon of PC over that of DMC. We have also prepared a novel electrolyte, lithium tetrakis(trifluoromethanesulfonato)gallate [LiGa(OTf)4], and investigated its relative binding to PC by 13C NMR spectroscopy. The latter salt showed significant deshielding of the carbonyl carbon of PC compared to the other salts studied, including the conventional LiPF6. However, its conductivity is not enhanced to the same extent and is comparable to that of LiBF4. The CVs show their relative stabilities toward oxidation around 4.5 V and reduction close to lithium potentials. All electrolytes studied here have good electrochemical stability from 0.1 to 5.0 V vs. Li+/Li, and are suitable for applications in lithium-ion cells. |
| type | Article - Journal |
| type.DCMIType | text |
| type.status | Postprint |
| rights | Pre-print: archiving status unclear; Post-print: author can archive; |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| rights.URI | |
| relation.isPartOf | Electrochemical and Solid State Letters |
| date.available | 2008-06-27T16:29:32Z |
| identifier.persist.URI |