A secondary battery and its preparation method, the secondary battery having a negative electrode containing a negative current collector and no negative active material; an electrolyte having an electrolyte salt and an organic solvent; a separator; a positive electrode having a positive active material layer containing a positive active material, wherein the positive active material comprises a material having a layered crystal structure; and a battery case used for packaging. Main active component of the secondary battery is the positive active material having a layered crystal structure, which is environmentally-friendly and low in cost; meanwhile, negative active material is not needed by the second battery system, thereby remarkably reducing the weight and cost of the battery and improving the battery energy density. The reaction mechanism adopted by the secondary battery significantly increases the working voltage of the battery and further improves the energy density of the battery.

The invention provides methods of preparing carbon/sulfur composites. In certain embodiments, the composites comprise multidimensional carbon tubular and/or spherical networks loaded with elemental sulfur, as well as compositions comprising such composites.

The invention provides methods of preparing carbon/sulfur composites. In certain embodiments, the composites comprise multidimensional carbon tubular and/or spherical networks loaded with elemental sulfur, as well as compositions comprising such composites.

An embodiment of the present disclosure provides an ion battery electrode material that significantly improves scan rate, capacity exhibiting, safety, and energy density compared to conventional ion batteries by manufacturing bulk POM in a layered structure in which bulk POM is uniformly distributed in several nanometers on the surface of rGO/PPy, and a method for synthesizing ion battery electrode materials.

An embodiment of the present disclosure provides an ion battery electrode material that significantly improves scan rate, capacity exhibiting, safety, and energy density compared to conventional ion batteries by manufacturing bulk POM in a layered structure in which bulk POM is uniformly distributed in several nanometers on the surface of rGO/PPy, and a method for synthesizing ion battery electrode materials.

A method for manufacturing a secondary battery is provided. The method for manufacturing a secondary battery may comprise the steps of: preparing a metal substrate; surface treating the metal substrate to form a passivation layer comprising S and F; and using the metal substrate on which the passivation layer is formed as an anode to manufacture a secondary battery.

A method for manufacturing a secondary battery is provided. The method for manufacturing a secondary battery may comprise the steps of: preparing a metal substrate; surface treating the metal substrate to form a passivation layer comprising S and F; and using the metal substrate on which the passivation layer is formed as an anode to manufacture a secondary battery.

Provided is a method for manufacturing an electrode structure. The method for manufacturing an electrode structure may comprise the steps of: preparing a first precursor having a chalcogen element, a second precursor having phosphorus, and a third precursor having a transition metal; preparing a suspension by mixing the first precursor, the second precursor, and the third precursor in a first solvent; adding a reducing agent to the suspension and causing a reaction therebetween to produce an intermediate product; and adding the intermediate product and a surfactant to a second solvent and heat-treating under pressure, to thereby manufacture an electrode structure comprising the chalcogen element, the phosphorus, and the transition metal.

Provided is a method for manufacturing an electrode structure. The method for manufacturing an electrode structure may comprise the steps of: preparing a first precursor having a chalcogen element, a second precursor having phosphorus, and a third precursor having a transition metal; preparing a suspension by mixing the first precursor, the second precursor, and the third precursor in a first solvent; adding a reducing agent to the suspension and causing a reaction therebetween to produce an intermediate product; and adding the intermediate product and a surfactant to a second solvent and heat-treating under pressure, to thereby manufacture an electrode structure comprising the chalcogen element, the phosphorus, and the transition metal.

The present application provides an electrode plate and a preparation method therefor, and a battery. The preparation method comprises the following steps: (1) mixing and granulating an active substance, a conductive agent, a solvent and a binder to obtain mixed particles; and (2) performing lamination on the mixed particles in step (1) and a current collector in a laminator to obtain an electrode plate, wherein the laminator has three or more rollers.