| 초록 |
Recently, the binder-free metal oxide electrode is prepared through the deposition or growing of the metal oxides on the Ni-foam substrates. The direct contact between the active material and current collector in the 3-dimensional Ni-foam facilitates the sufficient electronic and ionic transfer kinetics. In another approach, the TiO2 or CuO based binder-free electrode is obtained by the etching of their respective matal foils (Ti or Cu). The metal foils acts as a continuous and fast conduction pathway to electrons, and subsequently reduces the electrical resistance of the electrode. However, the high cost and undesirable oxidation reactions of the metal substrates are main drawbacks, which seriously limit the application into a large scale. Herein, we prepared the binder-free Co3O4 electrode through the growing of Co3O4 directly on the freestanding agarose derived carbon-foam electrode. The high surface area of the freestanding carbon foam not only acting as a substrate for Co3O4, but also provide the electronic and ionic diffusion pathways. Due to the presence of high porosity, and electrical conductivity in the Co3O4/carbon foam composites, it is believed to give excellent performances in Li-ion battery anode. |
