Preparation and Characterization of Silica-Based Ionogel Electrolytes and Their Application in Solid-State Lithium Batteries
In this study, tetraethyl orthosilicate (TEOS) and methyltriethoxysilane (MTES) were used as precursors for silica, combined with the ionic liquid [BMIM-ClO<sub>4</sub>]. Lithium perchlorate was added as the lithium-ion source, and formic acid was employed as a catalyst to synthesize sil...
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| Format: | Article |
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MDPI AG
2023-08-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/17/3505 |
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| author | Ji-Cong Huang Yui Whei Chen-Yang Jiunn-Jer Hwang |
| author_facet | Ji-Cong Huang Yui Whei Chen-Yang Jiunn-Jer Hwang |
| author_sort | Ji-Cong Huang |
| collection | DOAJ |
| description | In this study, tetraethyl orthosilicate (TEOS) and methyltriethoxysilane (MTES) were used as precursors for silica, combined with the ionic liquid [BMIM-ClO<sub>4</sub>]. Lithium perchlorate was added as the lithium-ion source, and formic acid was employed as a catalyst to synthesize silica ionogel electrolytes via the sol–gel method. FT-IR and NMR identified the self-prepared ionic liquid [BMIM-ClO<sub>4</sub>], and its electrochemical window was determined using linear sweep voltammetry (LSV). The properties of the prepared silica ionogel electrolytes were further investigated through FT-IR, DSC, and <sup>29</sup>Si MAS NMR measurements, followed by electrochemical property measurements, including conductivity, electrochemical impedance spectroscopy (EIS), LSV, and charge–discharge tests. The experimental results showed that adding methyltriethoxysilane (MTES) enhanced the mechanical strength of the silica ionogel electrolyte, simplifying its preparation process. The prepared silica ionogel electrolyte exhibited a high ionic conductivity of 1.65 × 10<sup>−3</sup> S/cm. In the LSV test, the silica ionogel electrolyte demonstrated high electrochemical stability, withstanding over 5 V without oxidative decomposition. Finally, during the discharge–charge test, the second-cycle capacity reached 108.7 mAh/g at a discharge–charge rate of 0.2 C and a temperature of 55 °C. |
| first_indexed | 2024-03-10T23:15:25Z |
| format | Article |
| id | doaj.art-6818d1e9e0b44e85b6935bd7f7792411 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T23:15:25Z |
| publishDate | 2023-08-01 |
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| series | Polymers |
| spelling | doaj.art-6818d1e9e0b44e85b6935bd7f77924112023-11-19T08:42:32ZengMDPI AGPolymers2073-43602023-08-011517350510.3390/polym15173505Preparation and Characterization of Silica-Based Ionogel Electrolytes and Their Application in Solid-State Lithium BatteriesJi-Cong Huang0Yui Whei Chen-Yang1Jiunn-Jer Hwang2Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, TaiwanDepartment of Chemistry, Chung Yuan Christian University, Chung Li 32023, TaiwanDepartment of Chemical Engineering, Army Academy, Chung Li 32092, TaiwanIn this study, tetraethyl orthosilicate (TEOS) and methyltriethoxysilane (MTES) were used as precursors for silica, combined with the ionic liquid [BMIM-ClO<sub>4</sub>]. Lithium perchlorate was added as the lithium-ion source, and formic acid was employed as a catalyst to synthesize silica ionogel electrolytes via the sol–gel method. FT-IR and NMR identified the self-prepared ionic liquid [BMIM-ClO<sub>4</sub>], and its electrochemical window was determined using linear sweep voltammetry (LSV). The properties of the prepared silica ionogel electrolytes were further investigated through FT-IR, DSC, and <sup>29</sup>Si MAS NMR measurements, followed by electrochemical property measurements, including conductivity, electrochemical impedance spectroscopy (EIS), LSV, and charge–discharge tests. The experimental results showed that adding methyltriethoxysilane (MTES) enhanced the mechanical strength of the silica ionogel electrolyte, simplifying its preparation process. The prepared silica ionogel electrolyte exhibited a high ionic conductivity of 1.65 × 10<sup>−3</sup> S/cm. In the LSV test, the silica ionogel electrolyte demonstrated high electrochemical stability, withstanding over 5 V without oxidative decomposition. Finally, during the discharge–charge test, the second-cycle capacity reached 108.7 mAh/g at a discharge–charge rate of 0.2 C and a temperature of 55 °C.https://www.mdpi.com/2073-4360/15/17/3505ionogelelectrolyteslithium batteryionic conductivitysilica |
| spellingShingle | Ji-Cong Huang Yui Whei Chen-Yang Jiunn-Jer Hwang Preparation and Characterization of Silica-Based Ionogel Electrolytes and Their Application in Solid-State Lithium Batteries Polymers ionogel electrolytes lithium battery ionic conductivity silica |
| title | Preparation and Characterization of Silica-Based Ionogel Electrolytes and Their Application in Solid-State Lithium Batteries |
| title_full | Preparation and Characterization of Silica-Based Ionogel Electrolytes and Their Application in Solid-State Lithium Batteries |
| title_fullStr | Preparation and Characterization of Silica-Based Ionogel Electrolytes and Their Application in Solid-State Lithium Batteries |
| title_full_unstemmed | Preparation and Characterization of Silica-Based Ionogel Electrolytes and Their Application in Solid-State Lithium Batteries |
| title_short | Preparation and Characterization of Silica-Based Ionogel Electrolytes and Their Application in Solid-State Lithium Batteries |
| title_sort | preparation and characterization of silica based ionogel electrolytes and their application in solid state lithium batteries |
| topic | ionogel electrolytes lithium battery ionic conductivity silica |
| url | https://www.mdpi.com/2073-4360/15/17/3505 |
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