Binary ionic liquid electrolyte design for ultrahigh-energy density graphene-based supercapacitors
Although room temperature ionic liquids (ILs) have emerged as potential next-generation electrolytes for their wide electrochemical stability window (ESW), the trade-off between this window and viscosity has hindered their widespread use in energy storage devices. Here, we present for the first time...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co. Ltd.
2022-05-01
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| Series: | Materials Reports: Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666935822000246 |
| _version_ | 1797938026553278464 |
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| author | Shao Ing Wong Han Lin Tianyi Ma Jaka Sunarso Basil T. Wong Baohua Jia |
| author_facet | Shao Ing Wong Han Lin Tianyi Ma Jaka Sunarso Basil T. Wong Baohua Jia |
| author_sort | Shao Ing Wong |
| collection | DOAJ |
| description | Although room temperature ionic liquids (ILs) have emerged as potential next-generation electrolytes for their wide electrochemical stability window (ESW), the trade-off between this window and viscosity has hindered their widespread use in energy storage devices. Here, we present for the first time that such a trade-off can be balanced by mixing two ILs with the common anion ([NTf2]−) but different cations ([EMIM]+ and [N1114]+) together. The [EMIM] cation-based IL possesses low viscosity while the [N1114] cation-based IL exhibits wide ESW. Since the concentrations of each IL in the mixtures can result in different electrolyte properties, we demonstrate a systematic approach by exploring the properties of various concentration combinations. In addition, the corresponding cell voltage of their resulting graphene supercapacitors (SCs) accompanied based on the interaction between the binary ionic liquid and the electrodes, and the associated electrochemical performance were studied to determine the optimum electrolyte system for the highest SC energy density. The well-balanced viscosity/ESW trade-off is achieved in binary IL consisting 50 vol% [EMIM][NTf2] and 50 vol% [N1114][NTf2] as evident from the extraordinary electrode specific capacitance of 293.1 F g−1 and the ultrahigh SC energy density of 177 Wh kg−1, which approaches that of a lithium-ion battery. |
| first_indexed | 2024-04-10T18:53:20Z |
| format | Article |
| id | doaj.art-254e2337789e429fba7e911150db9bf2 |
| institution | Directory Open Access Journal |
| issn | 2666-9358 |
| language | English |
| last_indexed | 2024-04-10T18:53:20Z |
| publishDate | 2022-05-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | Materials Reports: Energy |
| spelling | doaj.art-254e2337789e429fba7e911150db9bf22023-02-01T04:28:23ZengKeAi Communications Co. Ltd.Materials Reports: Energy2666-93582022-05-0122100093Binary ionic liquid electrolyte design for ultrahigh-energy density graphene-based supercapacitorsShao Ing Wong0Han Lin1Tianyi Ma2Jaka Sunarso3Basil T. Wong4Baohua Jia5Centre for Translational Atomaterials, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia; Research Centre for Sustainable Technologies, Faculty of Engineering, Computing and Science, Swinburne University of Technology, Jalan Simpang Tiga, 93350 Kuching, Sarawak, MalaysiaCentre for Translational Atomaterials, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, Victoria 3122, AustraliaCentre for Translational Atomaterials, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia; School of Science, RMIT University, Melbourne, Victoria 3000, AustraliaResearch Centre for Sustainable Technologies, Faculty of Engineering, Computing and Science, Swinburne University of Technology, Jalan Simpang Tiga, 93350 Kuching, Sarawak, Malaysia; Corresponding author.Research Centre for Sustainable Technologies, Faculty of Engineering, Computing and Science, Swinburne University of Technology, Jalan Simpang Tiga, 93350 Kuching, Sarawak, MalaysiaCentre for Translational Atomaterials, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia; School of Science, RMIT University, Melbourne, Victoria 3000, Australia; Corresponding author. Centre for Translational Atomaterials, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, Victoria, 3122, Australia.Although room temperature ionic liquids (ILs) have emerged as potential next-generation electrolytes for their wide electrochemical stability window (ESW), the trade-off between this window and viscosity has hindered their widespread use in energy storage devices. Here, we present for the first time that such a trade-off can be balanced by mixing two ILs with the common anion ([NTf2]−) but different cations ([EMIM]+ and [N1114]+) together. The [EMIM] cation-based IL possesses low viscosity while the [N1114] cation-based IL exhibits wide ESW. Since the concentrations of each IL in the mixtures can result in different electrolyte properties, we demonstrate a systematic approach by exploring the properties of various concentration combinations. In addition, the corresponding cell voltage of their resulting graphene supercapacitors (SCs) accompanied based on the interaction between the binary ionic liquid and the electrodes, and the associated electrochemical performance were studied to determine the optimum electrolyte system for the highest SC energy density. The well-balanced viscosity/ESW trade-off is achieved in binary IL consisting 50 vol% [EMIM][NTf2] and 50 vol% [N1114][NTf2] as evident from the extraordinary electrode specific capacitance of 293.1 F g−1 and the ultrahigh SC energy density of 177 Wh kg−1, which approaches that of a lithium-ion battery.http://www.sciencedirect.com/science/article/pii/S2666935822000246ElectrolyteBinary ionic liquidMaximum working voltageHigh capacitanceHigh energy densitySupercapacitor |
| spellingShingle | Shao Ing Wong Han Lin Tianyi Ma Jaka Sunarso Basil T. Wong Baohua Jia Binary ionic liquid electrolyte design for ultrahigh-energy density graphene-based supercapacitors Materials Reports: Energy Electrolyte Binary ionic liquid Maximum working voltage High capacitance High energy density Supercapacitor |
| title | Binary ionic liquid electrolyte design for ultrahigh-energy density graphene-based supercapacitors |
| title_full | Binary ionic liquid electrolyte design for ultrahigh-energy density graphene-based supercapacitors |
| title_fullStr | Binary ionic liquid electrolyte design for ultrahigh-energy density graphene-based supercapacitors |
| title_full_unstemmed | Binary ionic liquid electrolyte design for ultrahigh-energy density graphene-based supercapacitors |
| title_short | Binary ionic liquid electrolyte design for ultrahigh-energy density graphene-based supercapacitors |
| title_sort | binary ionic liquid electrolyte design for ultrahigh energy density graphene based supercapacitors |
| topic | Electrolyte Binary ionic liquid Maximum working voltage High capacitance High energy density Supercapacitor |
| url | http://www.sciencedirect.com/science/article/pii/S2666935822000246 |
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