Use of plant extracts in fabricating manganese-based film electrode for capacitor

Abstract

The possibility of using plant extracts to fabricate manganese-based film electrode for capacitor was explored in this study. This was achieved by using manganese sulfate as the source of manganese as well as triethylenetetramine (TETA) and extracts from pineapple leaf (ananas comosus), hibiscus rosa leaf, and ginger root (zingiber Officinale) to prepare the ink. During the experimentation, it was discovered that the application of different plant extract solutions led to the production of several manganese oxides. Moreover, electrode fabricated from Mn-TETA-GE had different forms of MnO, Mn2O3, and Mn3O4 as well as the highest average specific capacitance of 38 F g−1 which was almost a steady value. The results also showed that the presence of gingerol in the ginger extract solution led to the reduction of manganese ion to Mn. Furthermore, the oxidation state of Mn was varied to Mn2+ and Mn3+ due to the acidic condition of gingerol content. The variation of manganese oxide was not found to be significant in film electrode fabricated using hibiscus rosa and pineapple extracts. This confirmed that gingerol had the potential to be applied in fabricating electrode for capacitor.