The Use of Succinonitrile as an Electrolyte Additive for Composite-Fiber Membranes in Lithium-Ion Batteries
In the present work, the effect of temperature and additives on the ionic conductivity of mixed organic/ionic liquid electrolytes (MOILEs) was investigated by conducting galvanostatic charge/discharge and ionic conductivity experiments. The mixed electrolyte is based on the ionic liquid (IL) (EMI/TF...
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| Format: | Article |
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MDPI AG
2020-03-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/10/3/45 |
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| author | Jahaziel Villarreal Roberto Orrostieta Chavez Sujay A. Chopade Timothy P. Lodge Mataz Alcoutlabi |
| author_facet | Jahaziel Villarreal Roberto Orrostieta Chavez Sujay A. Chopade Timothy P. Lodge Mataz Alcoutlabi |
| author_sort | Jahaziel Villarreal |
| collection | DOAJ |
| description | In the present work, the effect of temperature and additives on the ionic conductivity of mixed organic/ionic liquid electrolytes (MOILEs) was investigated by conducting galvanostatic charge/discharge and ionic conductivity experiments. The mixed electrolyte is based on the ionic liquid (IL) (EMI/TFSI/LiTFSI) and organic solvents EC/DMC (1:1 <i>v</i>/<i>v</i>). The effect of electrolyte type on the electrochemical performance of a LiCoO<sub>2</sub> cathode and a SnO<sub>2</sub>/C composite anode in lithium anode (or cathode) half-cells was also investigated. The results demonstrated that the addition of 5 wt.% succinonitrile (SN) resulted in enhanced ionic conductivity of a 60% EMI-TFSI 40% EC/DMC MOILE from ~14 mS·cm<sup>−1</sup> to ~26 mS·cm<sup>−1</sup> at room temperature. Additionally, at a temperature of 100 °C, an increase in ionic conductivity from ~38 to ~69 mS·cm<sup>−1</sup> was observed for the MOILE with 5 wt% SN. The improvement in the ionic conductivity is attributed to the high polarity of SN and its ability to dissolve various types of salts such as LiTFSI. The galvanostatic charge/discharge results showed that the LiCoO<sub>2</sub> cathode with the MOILE (without SN) exhibited a 39% specific capacity loss at the 50th cycle while the LiCoO<sub>2</sub> cathode in the MOILE with 5 wt.% SN showed a decrease in specific capacity of only 14%. The addition of 5 wt.% SN to the MOILE with a SnO<sub>2</sub>/C composite-fiber anode resulted in improved cycling performance and rate capability of the SnO<sub>2</sub>/C composite-membrane anode in lithium anode half-cells. Based on the results reported in this work, a new avenue and promising outcome for the future use of MOILEs with SN in lithium-ion batteries (LIBs) can be opened. |
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| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-12T19:44:34Z |
| publishDate | 2020-03-01 |
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| spelling | doaj.art-b3137221578d4a368ab3be6867a5901e2023-08-02T03:37:30ZengMDPI AGMembranes2077-03752020-03-011034510.3390/membranes10030045membranes10030045The Use of Succinonitrile as an Electrolyte Additive for Composite-Fiber Membranes in Lithium-Ion BatteriesJahaziel Villarreal0Roberto Orrostieta Chavez1Sujay A. Chopade2Timothy P. Lodge3Mataz Alcoutlabi4Department of Mechanical Engineering, University of Texas, Rio Grande Valley, Edinburg, TX 78539, USADepartment of Mechanical Engineering, University of Texas, Rio Grande Valley, Edinburg, TX 78539, USADepartment of Chemical Engineering and Materials Science and Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, USADepartment of Chemical Engineering and Materials Science and Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, USADepartment of Mechanical Engineering, University of Texas, Rio Grande Valley, Edinburg, TX 78539, USAIn the present work, the effect of temperature and additives on the ionic conductivity of mixed organic/ionic liquid electrolytes (MOILEs) was investigated by conducting galvanostatic charge/discharge and ionic conductivity experiments. The mixed electrolyte is based on the ionic liquid (IL) (EMI/TFSI/LiTFSI) and organic solvents EC/DMC (1:1 <i>v</i>/<i>v</i>). The effect of electrolyte type on the electrochemical performance of a LiCoO<sub>2</sub> cathode and a SnO<sub>2</sub>/C composite anode in lithium anode (or cathode) half-cells was also investigated. The results demonstrated that the addition of 5 wt.% succinonitrile (SN) resulted in enhanced ionic conductivity of a 60% EMI-TFSI 40% EC/DMC MOILE from ~14 mS·cm<sup>−1</sup> to ~26 mS·cm<sup>−1</sup> at room temperature. Additionally, at a temperature of 100 °C, an increase in ionic conductivity from ~38 to ~69 mS·cm<sup>−1</sup> was observed for the MOILE with 5 wt% SN. The improvement in the ionic conductivity is attributed to the high polarity of SN and its ability to dissolve various types of salts such as LiTFSI. The galvanostatic charge/discharge results showed that the LiCoO<sub>2</sub> cathode with the MOILE (without SN) exhibited a 39% specific capacity loss at the 50th cycle while the LiCoO<sub>2</sub> cathode in the MOILE with 5 wt.% SN showed a decrease in specific capacity of only 14%. The addition of 5 wt.% SN to the MOILE with a SnO<sub>2</sub>/C composite-fiber anode resulted in improved cycling performance and rate capability of the SnO<sub>2</sub>/C composite-membrane anode in lithium anode half-cells. Based on the results reported in this work, a new avenue and promising outcome for the future use of MOILEs with SN in lithium-ion batteries (LIBs) can be opened.https://www.mdpi.com/2077-0375/10/3/45ionic liquidssuccinonitrileelectrolytelithium ion batteriescomposite fibersmixtures |
| spellingShingle | Jahaziel Villarreal Roberto Orrostieta Chavez Sujay A. Chopade Timothy P. Lodge Mataz Alcoutlabi The Use of Succinonitrile as an Electrolyte Additive for Composite-Fiber Membranes in Lithium-Ion Batteries Membranes ionic liquids succinonitrile electrolyte lithium ion batteries composite fibers mixtures |
| title | The Use of Succinonitrile as an Electrolyte Additive for Composite-Fiber Membranes in Lithium-Ion Batteries |
| title_full | The Use of Succinonitrile as an Electrolyte Additive for Composite-Fiber Membranes in Lithium-Ion Batteries |
| title_fullStr | The Use of Succinonitrile as an Electrolyte Additive for Composite-Fiber Membranes in Lithium-Ion Batteries |
| title_full_unstemmed | The Use of Succinonitrile as an Electrolyte Additive for Composite-Fiber Membranes in Lithium-Ion Batteries |
| title_short | The Use of Succinonitrile as an Electrolyte Additive for Composite-Fiber Membranes in Lithium-Ion Batteries |
| title_sort | use of succinonitrile as an electrolyte additive for composite fiber membranes in lithium ion batteries |
| topic | ionic liquids succinonitrile electrolyte lithium ion batteries composite fibers mixtures |
| url | https://www.mdpi.com/2077-0375/10/3/45 |
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