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In this paper, a novel and simple sodium alginate (SA) gel method was developed to prepare γ-NaxCo2O4. This method involved the chemical gelling of SA in the presence of Co2+ ions by cross-linking. After calcining at 700°C to 800°C, single-phase γ-NaxCo2O4 crystals were obtained. The arrangement of about 1 μm to 4 μm flaky particles exhibited a well-tiled structure along the plane direction of...
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