Alkaline zinc-air battery electrolyte composite additive and electrolyte and metal-air battery
A zinc-air battery and compound additive technology, which can be applied to fuel cell-type half-cells and primary-cell-type half-cells, primary batteries, aqueous electrolyte batteries, etc. Reduce the service life and other problems, to achieve the effect of prolonging the use time, slowing down the reduction of hydroxide ion concentration, and improving the efficiency of the battery anode
Active Publication Date: 2022-03-15
蔚蓝(广东)新能源科技有限公司
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- Application Information
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Problems solved by technology
However, during the discharge process of alkaline zinc-air batteries, the zinc in the electrolyte undergoes self-corrosion reactions while performing electrochemical reactions. The self-corrosion of zinc not only reduces the utilization rate of the battery, but also reduces the specific energy of the battery; in addition, During the discharge process, the concentration of zincate in the electrolyte gradually increases, which reduces the life of the electrolyte and is not practical.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0025] Prepare 124mL of alkaline zinc-air battery electrolyte, called electrolyte 1, the alkaline zinc-air battery electrolyte includes 6mol / L KOH, 0.02g / L glucose and 4g / L calcium citrate.
[0026] Electrolyte 1 is used in zinc-air battery for constant power discharge test, according to 100mW / cm 2 The power density of the 4W constant power discharge test until the voltage drops to 0.8V. The average voltage of the zinc-air battery is 1.039V, the full power discharge time is 147min, and the specific energy of the zinc plate is 0.963Wh / g.
Embodiment 2
[0028] Prepare 124mL of alkaline zinc-air battery electrolyte, called electrolyte 2, the alkaline zinc-air battery electrolyte includes 6mol / L KOH, 0.197g / L potassium manganate and 4g / L calcium citrate.
Embodiment 3
[0030] Prepare 124mL of alkaline zinc-air battery electrolyte, called electrolyte 3, the alkaline zinc-air battery electrolyte includes 6mol / L of KOH, 1g / L of sodium stannate and 4g / L of calcium citrate.
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Abstract
The invention provides a composite additive for an alkaline zinc-air battery electrolyte, comprising a hydrogen evolution inhibitor and an alkaline activator. Especially the compound of calcium citrate and glucose is used as compound additive. The hydrogen evolution inhibitor can inhibit the hydrogen evolution self-corrosion of zinc during the discharge process, and improve the efficiency of the battery anode during the discharge process, and the use of alkaline activators can complex the zinc ions generated by the electrochemical reaction, effectively reducing the zinc ions and hydroxide ions to form zinc Salt, so as to effectively slow down the decrease of the concentration of hydroxide ions in the electrolyte and the negative impact of zincate on the electrolyte, so as to prolong the use of the electrolyte. The two work together in the electrolyte, not only can improve the discharge process The anode efficiency of the battery can be extended, and the usage time of the electrolyte can be extended. The application also provides an electrolyte and a metal-air battery.
Description
technical field [0001] The invention relates to the technical field of metal-air batteries, in particular to a composite additive for the electrolyte of an alkaline zinc-air battery, the electrolyte and the metal-air battery. Background technique [0002] With the increasingly serious energy and environmental problems, human beings urgently need to develop new energy sources to replace traditional fuels. Metal-air batteries have been extensively studied due to their advantages of high specific energy, low cost, and environmental protection. Among them, metal zinc is rich in resources, low in price, and has a stable reaction process. In recent years, researchers have been conducting research on zinc-air batteries. [0003] In the alkaline zinc-air battery, the active metal zinc is used as the anode, the hydrophobic and gas-permeable gas diffusion electrode is used as the cathode, and the alkaline (potassium hydroxide / sodium hydroxide) solution is used as the electrolyte. Du...
Claims
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IPC IPC(8): H01M6/04H01M12/06
CPCH01M6/045H01M12/06
Inventor 陈冬芬窦树楠吴继昌邓伟超
Owner 蔚蓝(广东)新能源科技有限公司