On-Chip Asymmetric Microsupercapacitors Combining Reduced Graphene Oxide and Manganese Oxide for High Energy-Power Tradeoff
Given the rapid miniaturization of technology, it is of interest to produce viable on-chip micro-electrochemical energy storage systems. In this study, interdigitated asymmetric microsupercapacitors were fabricated using photolithography, lift-off and electrodeposition methods. Manganese oxide (MnOx...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-08-01
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| Series: | Micromachines |
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| Online Access: | http://www.mdpi.com/2072-666X/9/8/399 |
| _version_ | 1818043469238632448 |
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| author | Richa Agrawal Chunlei Wang |
| author_facet | Richa Agrawal Chunlei Wang |
| author_sort | Richa Agrawal |
| collection | DOAJ |
| description | Given the rapid miniaturization of technology, it is of interest to produce viable on-chip micro-electrochemical energy storage systems. In this study, interdigitated asymmetric microsupercapacitors were fabricated using photolithography, lift-off and electrodeposition methods. Manganese oxide (MnOx) and reduced graphene oxide (rGO) comprised the pseudocapacitive and the double layer component, respectively. Symmetric MnOx//MnOx, rGO//rGO as well as asymmetric rGO//MnOx microsupercapacitors with three different MnOx thicknesses were constructed and characterized in aqueous media. The asymmetric microsupercapacitor with the intermediate MnOx film thickness displayed the optimal energy-power trade-off superior to that of both the symmetric and well as the other asymmetric configurations. The optimal microsupercapacitor exhibited a high stack energy density of 1.02 mWh·cm−3 and a maximal power density of 3.44 W·cm−3. The high energy-power trade-off of the device is attributed to the synergistic effects of utilizing double layer and pseudocapacitive charge storage mechanisms along with in-plane interdigital microelectrode design within one optimized micro-device. |
| first_indexed | 2024-12-10T09:02:42Z |
| format | Article |
| id | doaj.art-1e3a246d7f0c4fbc88ef16bda18a6a4c |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-12-10T09:02:42Z |
| publishDate | 2018-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-1e3a246d7f0c4fbc88ef16bda18a6a4c2022-12-22T01:55:13ZengMDPI AGMicromachines2072-666X2018-08-019839910.3390/mi9080399mi9080399On-Chip Asymmetric Microsupercapacitors Combining Reduced Graphene Oxide and Manganese Oxide for High Energy-Power TradeoffRicha Agrawal0Chunlei Wang1Department of Mechanical and Materials Engineering, Florida International University, Miami, FL 33174, USADepartment of Mechanical and Materials Engineering, Florida International University, Miami, FL 33174, USAGiven the rapid miniaturization of technology, it is of interest to produce viable on-chip micro-electrochemical energy storage systems. In this study, interdigitated asymmetric microsupercapacitors were fabricated using photolithography, lift-off and electrodeposition methods. Manganese oxide (MnOx) and reduced graphene oxide (rGO) comprised the pseudocapacitive and the double layer component, respectively. Symmetric MnOx//MnOx, rGO//rGO as well as asymmetric rGO//MnOx microsupercapacitors with three different MnOx thicknesses were constructed and characterized in aqueous media. The asymmetric microsupercapacitor with the intermediate MnOx film thickness displayed the optimal energy-power trade-off superior to that of both the symmetric and well as the other asymmetric configurations. The optimal microsupercapacitor exhibited a high stack energy density of 1.02 mWh·cm−3 and a maximal power density of 3.44 W·cm−3. The high energy-power trade-off of the device is attributed to the synergistic effects of utilizing double layer and pseudocapacitive charge storage mechanisms along with in-plane interdigital microelectrode design within one optimized micro-device.http://www.mdpi.com/2072-666X/9/8/399asymmetric electrochemical capacitorsinterdigitated microsupercapacitorselectrophoretic depositionreduced graphene oxidemanganese oxide |
| spellingShingle | Richa Agrawal Chunlei Wang On-Chip Asymmetric Microsupercapacitors Combining Reduced Graphene Oxide and Manganese Oxide for High Energy-Power Tradeoff Micromachines asymmetric electrochemical capacitors interdigitated microsupercapacitors electrophoretic deposition reduced graphene oxide manganese oxide |
| title | On-Chip Asymmetric Microsupercapacitors Combining Reduced Graphene Oxide and Manganese Oxide for High Energy-Power Tradeoff |
| title_full | On-Chip Asymmetric Microsupercapacitors Combining Reduced Graphene Oxide and Manganese Oxide for High Energy-Power Tradeoff |
| title_fullStr | On-Chip Asymmetric Microsupercapacitors Combining Reduced Graphene Oxide and Manganese Oxide for High Energy-Power Tradeoff |
| title_full_unstemmed | On-Chip Asymmetric Microsupercapacitors Combining Reduced Graphene Oxide and Manganese Oxide for High Energy-Power Tradeoff |
| title_short | On-Chip Asymmetric Microsupercapacitors Combining Reduced Graphene Oxide and Manganese Oxide for High Energy-Power Tradeoff |
| title_sort | on chip asymmetric microsupercapacitors combining reduced graphene oxide and manganese oxide for high energy power tradeoff |
| topic | asymmetric electrochemical capacitors interdigitated microsupercapacitors electrophoretic deposition reduced graphene oxide manganese oxide |
| url | http://www.mdpi.com/2072-666X/9/8/399 |
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