| 초록 |
Ni(OH)2 has been suggested as a good active material for pseudocapacitors due to its high theoretical capacitance value and the capability of relatively good reversible redox reactions, which provides 3~5 times higher capacitance than carbon-based electric double layer capacitors. However, the poor conductivity impedes the practical use of Ni(OH)2 based pseudocapacitors because it causes a long delay in charge transportation and poor long-term stability. In this work, we addressed the previous problems by simply depositing Ni-nano particles (Ni-NPs) on the Ni(OH)2 electrode. The Ni-NPs were deposited on the as-prepared Ni(OH)2 electrode near the contact region between the active materials and the substrate. The contact resistance was improved by the firm binding between active materials and the current collector, and the deposited Ni particles increased the active sites in the electrodes, which leads to high specific capacitance. |
