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A high-concentration, battery technology, applied in the direction of regenerative fuel cells, etc., can solve the problems of developing zinc-bromine batteries, reducing battery life, aging and other problems
Active Publication Date: 2016-03-02
周成壁
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However, bromine is a highly corrosive halogen element. During the operation of the battery, the electrode material is corroded and rapidly aged, which greatly reduces the battery life.
In addition, the diffusibility of repair is strong, it is easy to pass through the diaphragm, and directly react with zinc, causing serious self-discharge loss
These factors create obstacles to the development of zinc-bromine batteries
Method used
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Embodiment 1
[0019] Example 1: VO(SA) 2 Preparation, weigh appropriate amount of methanesulfonic acid and V 2 o 5 . Put methanesulfonic acid in a small beaker and add appropriate amount of distilled water, and V 2 o 5 into the solution, gradually adding oxalic acid until V 2 o 5 Dissolve completely. VO(SA) up to 4.5mol / L can be configured 2 solution.
[0020] Preparation steps:
[0021] ① Weigh V 2 o 5 41.0g.
[0022] ② Take the organic acid and add a small amount of distilled water to a 250ml beaker.
[0023] ③The weighed V 2 o 5 Add all to ② beaker.
[0024] ④ Add oxalic acid and stir until V 2 o 5 Dissolve completely.
[0025] ⑤ Add distilled water to make up to 100ml. Serve.
Embodiment 2
[0026] Embodiment 2: Preparation of negative electrode zinc sulfate electrolyte
[0027] Take 107.84gZnSO 4 ·7H 2 O in a beaker, take a certain amount of distilled water to dissolve it, add bone glue 0.01g, add thiourea to make its content in the solution 1wt%. Transfer to a 250mL volumetric flask, add distilled water to constant volume, and let it stand to obtain 1.5mol L -1 Zinc sulfate solution.
[0029] Take 56.96g of β-naphthol and 100mL of ethylene oxide in the FDK-autoclave controller, then add 1.58g of NaOH at 40°C-50°C, add dropwise 4mL of 98% concentrated H 2 SO 4 , then add 7.74mL50%H 2 SO 4 In an autoclave, stir and react at 40°C-50°C for 5 hours to obtain the target product β-naphthol polyoxyethylene ether. After the reaction is complete, it is suction filtered, then recrystallized, dried, and set aside.
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Abstract
The invention discloses a high concentration zinc and vanadium redox cell. According to the invention, the novel zinc vanadium oxidation reduction cell is characterized in that a vanadium ion solution is taken as an anode active substance, zinc and a zinc ion solution are taken as an cathode active substance, wherein the equilibrium potential is 1.76 V under a standard state, the open-circuit voltage is 1.7 - 2.0 V under a charging state. The vanadium ions of the vanadium ion solution are existed as quintavalence and quadrivalence (V(I), V(IV)), and the total vanadium concentration can reach to 4.0 mol / L, a solvent is inorganic acid or organic acid. The zinc ion solution is a zinc ion electrolyte containing organic acid or inorganic acid. The organic acid is methanesulfonic acid or sulfamic acid. The inorganic acid is sulfuric acid or nitric acid. The high energy concentration redox cell can be exploited according to the invention.
Description
technical field [0001] The invention belongs to the technical field of chemical power sources, and in particular relates to a high-concentration zinc-vanadium redox battery composed of vanadium ion electrolyte as positive active material and zinc and zinc ion electrolyte as negative active material. Background technique [0002] In today's energy field, the development and utilization of renewable energy such as solar energy and wind energy has attracted more and more attention. In order to achieve the stability of power supply, it is necessary to develop efficient large-scale energy storage technology. Secondary batteries are an important energy storage technology. Among them, redox flow batteries, such as all-vanadium batteries, zinc-bromine batteries, sodium polysulfide / bromine batteries, etc., have been researched and developed due to their special advantages in the direction of large-scale power storage, and will gradually be put on the market. [0003] A redox flow ba...
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