Rechargeable aqueous ion battery

An ion battery and water system technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as oxygen sensitivity, difficulty in ensuring long-term cycle, and cycle performance that cannot meet the requirements

Inactive Publication Date: 2015-02-18
ENPOWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the negative electrode material is very sensitive to oxygen, and it is difficult to ensure long-term cycle if the battery system does not remove oxygen.
[0011] In the prior art, water-based ion batteries are used as energy storage batteries, but the cycle performance still cannot meet the requirements and needs to be improved

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0028] The positive electrode active material uses commercial LiMn 2 o 4 . Cathode material according to LiMn 2 o 4 : Acetylene black: PTFE binder = 80:10:10 mass ratio and mix evenly, after drying, roll or roll the mixture onto a stainless steel mesh, and then make an electrode sheet with a thickness of 0.2mm. The negative electrode material is commercialized activated carbon, which is uniformly mixed according to the mass ratio of activated carbon: conductive carbon black: PTFE binder = 80:10:10. After drying, the mixture is rolled or rolled onto a stainless steel mesh, and then made into a 1mm thick electrode pads. Using analytically pure raw materials, configure 1M Li 2 SO 4 Electrolyte, adjust the pH of the electrolyte to 7.50 with LiOH. The positive and negative electrodes are cut according to the specifications, and the hydrophilic treated PP-based separator and the above-mentioned electrolyte are used to pair and assemble into a battery. In the working voltage ...

Embodiment 2

[0030] The positive electrode active material uses commercial LiMn 2 o 4 . Cathode material according to LiMn 2 o 4 : Acetylene black: PTFE binder = 80:10:10 mass ratio and mix evenly, after drying, roll or roll the mixture onto a stainless steel mesh, and then make an electrode sheet with a thickness of 0.2mm. The negative electrode material is commercialized activated carbon, which is uniformly mixed according to the mass ratio of activated carbon: conductive carbon black: PTFE binder = 80:10:10. After drying, the mixture is rolled or rolled onto a stainless steel mesh, and then made into a 1mm thick electrode pads. Using analytically pure raw materials, configure 1M Li 2 SO 4 Electrolyte, containing 0.4 M lithium acetate solution in the electrolyte, and adjusting the pH value of the electrolyte to 7.50 with LiOH. The positive and negative electrodes are cut according to the specifications, and the hydrophilic treated PP-based separator and the above-mentioned electro...

Embodiment 3

[0032] The positive electrode active material uses commercial LiMn 2 o 4 . Cathode material according to LiMn 2 o 4 : Acetylene black: PTFE binder = 80:10:10 mass ratio and mix evenly, after drying, roll or roll the mixture onto a stainless steel mesh, and then make an electrode sheet with a thickness of 0.2mm. The negative electrode material is commercialized activated carbon, which is uniformly mixed according to the mass ratio of activated carbon: conductive carbon black: PTFE binder = 80:10:10. After drying, the mixture is rolled or rolled onto a stainless steel mesh, and then made into a 1mm thick electrode pads. Using analytically pure raw materials, configure 1M Na 2 SO 4 Electrolyte, adjust the pH value of the electrolyte to 7.50 with NaOH. The positive and negative electrodes are cut according to the specifications, and the hydrophilic treated PP-based separator and the above-mentioned electrolyte are used to pair and assemble into a battery. In the working vo...

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Abstract

The invention belongs to the field of chemical power supply, and relates to a rechargeable aqueous ion battery with long life and high energy density. The rechargeable aqueous ion battery comprises an positive pole film, a negative pole film, a diaphragm and electrolyte, and is characterized in that the electrolyte adopts an alkali metal ion aqueous solution containing a buffering agent; cations of the buffering agent are one or more kinds of lithium ions, sodium ions, potassium ions, hydrogen ions and ammonium; and anions of the buffering agent are one or more kinds of acetate, phosphate radical, carbonate, citrate and formate. The rechargeable aqueous ion battery has the characteristics that the electrolyte of the aqueous ion battery contains the buffering agent, the buffering agent can stabilize the pH value of the system in the battery charge-discharge process, and side reaction of oxygen evolution and hydrogen evolution is inhibited, so that the energy density of the battery is increased, and the cycle life is prolonged. The rechargeable aqueous ion battery has high electrochemical energy, good cycle performance, environmental protection and the like and has broad market prospect.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a long-life and high-energy-density rechargeable aqueous ion battery. Background technique [0002] Energy is an important material basis for economic and social development. Since the industrial revolution, fossil energy resources such as coal, oil, and natural gas have been consumed rapidly around the world, and the ecological environment has continued to deteriorate. The sustainable development of human society has been seriously threatened. Therefore, saving fossil energy, improving the efficiency of fossil energy utilization, realizing energy conservation and emission reduction, large-scale utilization of renewable energy, and realizing energy diversification have become important strategies for energy security and sustainable economic development in all countries in the world. Renewable energy such as solar energy and wind energy has the characteristics of abundant resources, clea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36
CPCH01M10/36Y02E60/10
Inventor 朱用车勇戴翔王青方淳袁超群瞿培红
Owner ENPOWER ENERGY
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