10results about "Zinc-halogen accumulators" patented technology

This invention provides a modified positive electrode structure, a zinc-vanadium battery, and a method for preparing the same. [Solution] The zinc-vanadium battery comprises a modified positive electrode structure (including a positive electrode and a modified layer), a separator, a negative electrode, and an aqueous electrolyte. The positive electrode contains titanium. The modified layer is located on the positive electrode and contains 70-95 parts by weight of vanadium-based material, 3-45 parts by weight of conductive agent, and 3-45 parts by weight of binder. The separator is located on the modified layer. The negative electrode contains zinc and is located on the separator. The positive electrode, modified layer, separator, and negative electrode are all in the aqueous electrolyte. In the X-ray diffraction pattern of the vanadium-based material measured by XRD using CuKα1 rays, the peak intensity at 2θ=8°±1.0° is I8, and the peak intensity at 2θ=20°±1.0° is I 20 In that case, I8 and I 20 The ratio (I8 / I 20 ) is 0 <I8 / I 20 The condition ≤ 1.4 is satisfied. Furthermore, a modified cathode structure, a method for preparing the modified cathode structure, and a method for preparing a zinc-vanadium battery are also provided.

This invention provides a modified positive electrode structure, a zinc-vanadium battery, and a method for preparing the same. [Solution] The zinc-vanadium battery comprises a modified positive electrode structure (including a positive electrode and a modified layer), a separator, a negative electrode, and an aqueous electrolyte. The positive electrode contains titanium. The modified layer is located on the positive electrode and contains 70-95 parts by weight of vanadium-based material, 3-45 parts by weight of conductive agent, and 3-45 parts by weight of binder. The separator is located on the modified layer. The negative electrode contains zinc and is located on the separator. The positive electrode, modified layer, separator, and negative electrode are all in the aqueous electrolyte. In the X-ray diffraction pattern of the vanadium-based material measured by XRD using CuKα1 rays, the peak intensity at 2θ=8°±1.0° is I8, and the peak intensity at 2θ=20°±1.0° is I 20 In that case, I8 and I 20 The ratio (I8 / I 20 ) is 0 <I8 / I 20 The condition ≤ 1.4 is satisfied. Furthermore, a modified cathode structure, a method for preparing the modified cathode structure, and a method for preparing a zinc-vanadium battery are also provided.

A zinc-vanadium battery (1) includes a modified positive electrode structure (including a positive electrode (10) and a modified layer (12)), a separator (14), a negative electrode (16), and an aqueous electrolyte (18). The modified layer (12) on the positive electrode (10) includes 70-95 parts by weight of vanadium-based material, 3-45 parts by weight of a conductive agent, and 3-45 parts by weight of a binder. The separator (14) is on the modified layer (12), and the negative electrode (16) is on the separator (14). The positive electrode (10), the modified layer (12), the separator (14), and the negative electrode (16) are in the aqueous electrolyte (18). In the X-ray diffraction patterns of the vanadium-based material measured by XRD using CuKα1 ray, an intensity ratio of a peak at 2θ=8°±1.0° over a peak at 2θ=20°±1.0° (denoted as I8 and I20, respectively) satisfies 0<I8 / I20≤1.4. Furthermore, the modified positive electrode structure, a method of manufacturing the modified positive electrode structure, and a method (2) of manufacturing the zinc-vanadium battery (1) are provided.

This invention provides a zinc-iodine battery separator based on a three-dimensional covalent organic framework, its preparation method, and its application, relating to the research of organic materials and battery energy. This invention obtains organic framework materials (COFs) from tetrakis(4-aminophenyl)methane and terephthalaldehyde ligands via a solvothermal method; the organic framework materials are then assembled with conductive materials on a substrate surface to obtain a composite separator. This composite separator has a suitable pore size, enabling rapid transport of zinc ions (Zn). 2+ Meanwhile, the three-dimensional covalent organic framework can inhibit I3. – The shuttle function. The batteries assembled from them have high capacity, long cycle life, and excellent rate performance at high current densities.

This specification provides phosphorus cell electrolyte additive chemicals for use in aqueous batteries, which prevent self-discharge in the form of corrosion and hydrogen generation, improve battery efficiency, and extend storage life.

A zinc-vanadium battery includes a modified positive electrode structure (including a positive electrode and a modified layer), a separator, a negative electrode, and an aqueous electrolyte. The modified layer on the positive electrode includes 70-95 parts by weight of vanadium-based material, 3-45 parts by weight of a conductive agent, and 3-45 parts by weight of a binder. The separator is on the modified layer, and the negative electrode is on the separator. The positive electrode, the modified layer, the separator, and the negative electrode are in the aqueous electrolyte. In the X-ray diffraction patterns of the vanadium-based material measured by XRD using CuKα1 ray, an intensity ratio of a peak at 2θ=8°±1.0° over a peak at 2θ=20°±1.0° (denoted as I8 and I20, respectively) satisfies 0<I8 / I20≤1.4. Furthermore, the modified positive electrode structure, a method of manufacturing the modified positive electrode structure, and a method of manufacturing the zinc-vanadium battery are provided.

Zinc metal negative electrodes and aqueous electrolytes can be used in a rechargeable battery. The electrolyte can include zinc sulfate dissolved in water with a pH in the range of 0-7, and at least one additive for increasing ionic conductivity of the electrolyte, and / or buffering the pH of the electrolyte, and / or controlling morphology of a stripped / plated surface of the negative electrode. The electrolyte can decrease the likelihood of internal short circuits caused by volumetric expansion of the negative electrode and morphology changes after repeated cycling and penetration of zinc metal through a separator to a positive electrode.

The present invention relates to: a carbon-iodine-binder composite positive electrode sheet for an aqueous zinc-iodine battery; and a method for manufacturing same and, more specifically, to a carbon-iodine-binder composite positive electrode sheet for an aqueous zinc-iodine battery and a dry manufacturing method for same, the positive electrode sheet for an aqueous zinc-iodine battery being characterized by comprising porous carbon particles in which iodine is adsorbed and complexed in pores, a conductive material, and a fibrous polymer binder forming a network between the carbon particles and the conductive material.