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Nanostructured Manganese Dioxide for Hybrid Supercapacitor Electrodes
Hybrid supercapacitors, as emerging energy storage devices, have gained much attention in recent years due to their high energy density, fast charge/discharge and long cyclabilities. Among the wide range of systems covered by this topic, low cost, environmental friendliness and high power provide MnO2 with great characteristics to be a competitive candidate. The present work reports a hybrid aqueous supercapacitor system using a commercial activated carbon as the negative electrode and a synthesized manganese dioxide as the positive electrode. Two manganese dioxide polymorphs (α-MnO2 and δ-MnO2) were tested in different neutral and basic aqueous electrolytes. In this way, full cell systems that reached an energy density of 15.6 Wh kg−1 at a power density of 1 kW kg−1 were achieved. The electrode–electrolyte combination explored in this study exhibits excellent performance without losing capacity after 5000 charge/discharge cycles, leading to a promising approach towards more sustainable, high-performance energy storage systems. ; This research was funded by the Ministerio de Ciencia, Innovación y Universidades (PID2019-107468RB-C21 and TED2021-131517B-C21) and Gobierno Vasco/Eusko Jaurlaritza (IT1546-22).
Nanostructured Manganese Dioxide for Hybrid Supercapacitor Electrodes
Hybrid supercapacitors, as emerging energy storage devices, have gained much attention in recent years due to their high energy density, fast charge/discharge and long cyclabilities. Among the wide range of systems covered by this topic, low cost, environmental friendliness and high power provide MnO2 with great characteristics to be a competitive candidate. The present work reports a hybrid aqueous supercapacitor system using a commercial activated carbon as the negative electrode and a synthesized manganese dioxide as the positive electrode. Two manganese dioxide polymorphs (α-MnO2 and δ-MnO2) were tested in different neutral and basic aqueous electrolytes. In this way, full cell systems that reached an energy density of 15.6 Wh kg−1 at a power density of 1 kW kg−1 were achieved. The electrode–electrolyte combination explored in this study exhibits excellent performance without losing capacity after 5000 charge/discharge cycles, leading to a promising approach towards more sustainable, high-performance energy storage systems. ; This research was funded by the Ministerio de Ciencia, Innovación y Universidades (PID2019-107468RB-C21 and TED2021-131517B-C21) and Gobierno Vasco/Eusko Jaurlaritza (IT1546-22).
Nanostructured Manganese Dioxide for Hybrid Supercapacitor Electrodes
Rodríguez Romero, Jon (author) / Ruiz de Larramendi Villanueva, Idoia (author) / Goikolea Núñez, Eider (author)
2022-12-22
doi:10.3390/batteries8120263
Article (Journal)
Electronic Resource
English
DDC:
690
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