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A technology of zinc ion and single battery, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor stability of negative electrode materials, low cycle life and limited development
Active Publication Date: 2015-06-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
In contrast, lithium-ion batteries, especially lithium-ion battery cathode materials in water systems, have been researched for many years. However, due to the poor stability of the negative electrode materials of water-based lithium-ion batteries, the low cycle life limits the development.
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Embodiment 1
[0023] Preparation of positive electrode materials: (taking Mn oxide as an example)
[0024] Prepare 1L of 0.05mol / L MnSO 4 , 0.05mol / L LiNO 3 and 0.05mol / L K 2 S 2 o 2 Mix the solution, add 5 mL of 98% (w) concentrated H 2 S0 4 , A colorless and clear mixed solution was obtained after thorough stirring with a glass rod. The resulting colorless solution was reacted at a constant temperature in a water bath at 40° C. for 36 h. After the reaction was completed, the black precipitate was collected by suction filtration, washed repeatedly with deionized water until the solution was neutral, and dried under vacuum in an oven at 100°C for 12 hours to obtain the positive electrode material.
[0025] Preparation of positive electrode:
[0026] The prepared cathode material was mixed with acetylene black and PTFE (5% (w)) at a mass ratio of 75:15:10, and thoroughly ground with an agate mortar. Add an appropriate amount of ethanol, scrape evenly on 3x3cm with a blade 2 On the ...
Embodiment 2
[0033] Preparation of cathode materials: (taking Ni, Mn mixed oxide as an example)
[0034] Put nickel acetate, manganese sulfate, potassium permanganate, and lithium sulfate with a molar ratio of 3:3:6:1 in an agate mortar and grind for about 0.5 hours. When the color of the system is no longer deepened, transfer the solid mixture to Put it into a small beaker, heat it in a water bath at (80±5)°C for about 10 hours, grind it finely, and calcinate it in a muffle furnace at a high temperature of 300°C for 3 hours, then grind it finely.
[0035] Preparation of positive electrode:
[0036] The prepared cathode material was mixed with acetylene black and PTFE (5% (w)) at a mass ratio of 75:15:10, and thoroughly ground with an agate mortar. Add an appropriate amount of ethanol, scrape evenly on 3x3cm with a blade 2 On the nickel foam, put it into a vacuum oven at 120°C to dry to constant weight, press it into thin sheets under a pressure of 10MPa, and the positive active material...
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Abstract
The invention relates to an aqueous zinc ion single liquid flow battery system, which comprises a single battery or electric pile formed by over two single batteries in series connection, and an electrolyte solution equipped liquid storage tank. The single battery includes an anode and a cathode, the solute of the electrolyte solution is composed of a zinc ion-containing soluble salt and a soluble salt containing lithium ions and/or sodium ions, and the solvent is water. The anode active material is one of Li or/and Na ion embedded Mn oxide, Co oxide, Ni oxide and Fe oxide or a mixed oxide of more than two of the oxides, and the cathode is a sedimentary type electrode. The anode reaction of the battery adopts intercalation and deintercalation reaction of lithium ions or/and sodium ions, and has higher electrochemical reversibility than the zinc ion intercalation and deintercalation reaction of zinc ion liquid flow batteries. The cathode of the battery adopts zinc deposition dissolution, and compared with the lithium ion and/or sodium ion intercalation and deintercalation reaction of aqueous lithium ion battery cathodes, has higher reversibility, lower price and better cyclic stability.
Description
technical field [0001] The invention relates to a water system zinc ion single flow battery system. Background technique [0002] In recent years, with economic development and environmental pressure, the development of secondary batteries is in the ascendant. Among traditional secondary batteries, lithium-ion batteries have higher performance. Lithium-ion batteries use Li + As an energy storage medium to store electrical energy, Li + The embedding and de-embedding of the battery realize the charge and discharge cycle of the battery. However, because lithium is more active, the safety of lithium-ion batteries is poor. [0003] Combining lithium-ion batteries with traditional zinc-manganese dry batteries, Chinese patents such as CN101540417A disclose for the first time a rechargeable zinc-ion battery with manganese dioxide as the positive electrode, zinc as the negative electrode, and a solution containing zinc ions as the electrolyte. Zinc ions go out of manganese dioxid...
Claims
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