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Flower-shaped Co3O4 nanorods directly grown on nickel foam(Co3O4/NF) were prepared by one step hydrothermal method at low temperature. Co3O4 nanorods are directly connected with the nickel foam, and no binder is needed as an additive, so the Co3O4/NF electrode has good electrical conductivity. This flower-shaped structure makes larger surface area of Co3O4 nanorods that exposes to the electrolyte,...
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