Pseudocapacitive Charge Storage in Single-Step-Synthesized CoO-MnO2-MnCo2O4 Hybrid Nanowires in Aqueous Alkaline Electrolytes
A new pseudocapacitive combination, viz. CoOMnO2−MnCo2O4 hybrid nanowires (HNWs), is synthesized using a facile single-step hydrothermal process, and its properties are benchmarked with conventional battery-type flower-shaped MnCo2O4 obtained by similar processing. The HNWs showed high electrical co...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Chemical Society
2017
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| Online Access: | http://umpir.ump.edu.my/id/eprint/19284/1/rjose2017.pdf |
| _version_ | 1796992403029098496 |
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| author | Harilal, Midhun Krishnan, Syam G. Yar, Asfand Izan Izwan, Misnon Reddy, M. Venkatashamy M. M., Yusoff Dennis, John Ojur Rajan, Jose |
| author_facet | Harilal, Midhun Krishnan, Syam G. Yar, Asfand Izan Izwan, Misnon Reddy, M. Venkatashamy M. M., Yusoff Dennis, John Ojur Rajan, Jose |
| author_sort | Harilal, Midhun |
| collection | UMP |
| description | A new pseudocapacitive combination, viz. CoOMnO2−MnCo2O4 hybrid nanowires (HNWs), is synthesized using a facile single-step hydrothermal process, and its properties are benchmarked with conventional battery-type flower-shaped MnCo2O4 obtained by similar processing. The HNWs showed high electrical conductivity and specific capacitance ( Cs) (1650 Fg −1 or 184 mA h g −1 at 1 A g−1) with high capacity retention, whereas MnCo2O4 nanoflower electrode showed only one-third conductivity and one-half of its capacitance (872 F g−1 or 96 mA hg −1 at 1 A g−1) when used as a supercapacitor electrode in 6 MKOH electrolyte. The structure −property relationship of the materials is deeply investigated and reported herein. Using the HNWs as a pseudocapacitive electrode and commercial activated carbon as a supercapacitive electrode we achieved battery-like specific energy ( Es) and supercapacitor-like specific power ( Ps) in aqueous alkaline asymmetric supercapacitors (ASCs). The HNWs ASCs have shown high Es (90 Wh kg−1) (volumetric energy density Ev ≈ 0.52 Wh cm −3) with Ps up to ∼104 W kg −1 (volumetric power density Pv ≈ 5 W cm −3) in 6 M KOH electrolyte, allowing the device to store an order of magnitude more energy than conventional supercapacitors. |
| first_indexed | 2024-03-06T12:19:34Z |
| format | Article |
| id | UMPir19284 |
| institution | Universiti Malaysia Pahang |
| language | English |
| last_indexed | 2024-03-06T12:19:34Z |
| publishDate | 2017 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | UMPir192842018-10-10T04:57:13Z http://umpir.ump.edu.my/id/eprint/19284/ Pseudocapacitive Charge Storage in Single-Step-Synthesized CoO-MnO2-MnCo2O4 Hybrid Nanowires in Aqueous Alkaline Electrolytes Harilal, Midhun Krishnan, Syam G. Yar, Asfand Izan Izwan, Misnon Reddy, M. Venkatashamy M. M., Yusoff Dennis, John Ojur Rajan, Jose Q Science (General) QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering A new pseudocapacitive combination, viz. CoOMnO2−MnCo2O4 hybrid nanowires (HNWs), is synthesized using a facile single-step hydrothermal process, and its properties are benchmarked with conventional battery-type flower-shaped MnCo2O4 obtained by similar processing. The HNWs showed high electrical conductivity and specific capacitance ( Cs) (1650 Fg −1 or 184 mA h g −1 at 1 A g−1) with high capacity retention, whereas MnCo2O4 nanoflower electrode showed only one-third conductivity and one-half of its capacitance (872 F g−1 or 96 mA hg −1 at 1 A g−1) when used as a supercapacitor electrode in 6 MKOH electrolyte. The structure −property relationship of the materials is deeply investigated and reported herein. Using the HNWs as a pseudocapacitive electrode and commercial activated carbon as a supercapacitive electrode we achieved battery-like specific energy ( Es) and supercapacitor-like specific power ( Ps) in aqueous alkaline asymmetric supercapacitors (ASCs). The HNWs ASCs have shown high Es (90 Wh kg−1) (volumetric energy density Ev ≈ 0.52 Wh cm −3) with Ps up to ∼104 W kg −1 (volumetric power density Pv ≈ 5 W cm −3) in 6 M KOH electrolyte, allowing the device to store an order of magnitude more energy than conventional supercapacitors. American Chemical Society 2017-09-15 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/19284/1/rjose2017.pdf Harilal, Midhun and Krishnan, Syam G. and Yar, Asfand and Izan Izwan, Misnon and Reddy, M. Venkatashamy and M. M., Yusoff and Dennis, John Ojur and Rajan, Jose (2017) Pseudocapacitive Charge Storage in Single-Step-Synthesized CoO-MnO2-MnCo2O4 Hybrid Nanowires in Aqueous Alkaline Electrolytes. Journal of Physical Chemistry C, 121 (39). pp. 21171-21183. ISSN 1932-7447 (print); 1932-7455 (online). (Published) http://dx.doi.org/10.1021/acs.jpcc.7b06630 DOI: 10.1021/acs.jpcc.7b06630 |
| spellingShingle | Q Science (General) QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering Harilal, Midhun Krishnan, Syam G. Yar, Asfand Izan Izwan, Misnon Reddy, M. Venkatashamy M. M., Yusoff Dennis, John Ojur Rajan, Jose Pseudocapacitive Charge Storage in Single-Step-Synthesized CoO-MnO2-MnCo2O4 Hybrid Nanowires in Aqueous Alkaline Electrolytes |
| title | Pseudocapacitive Charge Storage in Single-Step-Synthesized CoO-MnO2-MnCo2O4 Hybrid Nanowires in Aqueous Alkaline Electrolytes |
| title_full | Pseudocapacitive Charge Storage in Single-Step-Synthesized CoO-MnO2-MnCo2O4 Hybrid Nanowires in Aqueous Alkaline Electrolytes |
| title_fullStr | Pseudocapacitive Charge Storage in Single-Step-Synthesized CoO-MnO2-MnCo2O4 Hybrid Nanowires in Aqueous Alkaline Electrolytes |
| title_full_unstemmed | Pseudocapacitive Charge Storage in Single-Step-Synthesized CoO-MnO2-MnCo2O4 Hybrid Nanowires in Aqueous Alkaline Electrolytes |
| title_short | Pseudocapacitive Charge Storage in Single-Step-Synthesized CoO-MnO2-MnCo2O4 Hybrid Nanowires in Aqueous Alkaline Electrolytes |
| title_sort | pseudocapacitive charge storage in single step synthesized coo mno2 mnco2o4 hybrid nanowires in aqueous alkaline electrolytes |
| topic | Q Science (General) QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering |
| url | http://umpir.ump.edu.my/id/eprint/19284/1/rjose2017.pdf |
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