A new material as a solid looping reactant for a novel chemical-looping combustion may lead to a new technology for mitigation of greenhouse gas and efficient use of energy. In this study, we have identified the fundamental features of several looping materials, which experience both reduction (fuel with metal oxide) and oxidation (the reduced metal with air), by using a thermogravimetric reactor (TGR). Furthermore, by synergetic combination of nickel oxide with cobalt oxide, we have synthesized a new looping material by use of a double metal oxide and by addition of YSZ. We found that this new looping material of CoO-NiO/YSZ has an excellent performance in high reactivity, complete avoidance of carbon deposition, and good repeatability. This finding supports the fact that this new solid reactant obtained here is a suitable looping material for application of the chemical-looping combustion.