A liquid flow water system rechargeable alkali metal ion battery

A technology of alkali metal ions and batteries, which is applied in the direction of regenerative fuel cells and fuel cell components, etc., can solve the problems of low energy density of batteries, and achieve the effects of easy centralized processing, high safety performance, and high energy density

Inactive Publication Date: 2011-11-30
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the liquid active material of the liquid vanadium battery is stored in the liquid storage tank outside the stack, the battery has a large capacity, is easy to adjust, has a long life, and the active material can be recycled. If it is treated centrally, it will not cause pollution. It has been widely concerned and developed rapidly, but the energy density of the battery is low, which limits its large-scale application

Method used

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  • A liquid flow water system rechargeable alkali metal ion battery
  • A liquid flow water system rechargeable alkali metal ion battery
  • A liquid flow water system rechargeable alkali metal ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The positive electrode material is LiMn2O4, the positive electrode slurry contains LiMn2O4 with a volume content of 28%, 2% carbon black and 70% electrolyte, the negative electrode material is carbon-coated LiTi2(PO4)3, and the negative electrode slurry contains a volume content of 28 % carbon coated LiTi 2 (PO 4 ) 3 , 2% carbon black and 70% electrolyte, the electrolyte is 5mol / L LiNO 3 The aqueous solution is used as the electrolyte, charged and discharged at a rate of 0.1C, the voltage range is 0-1.85V, and the charge and discharge curve is as follows figure 2 shown.

Embodiment 2

[0030] The cathode material is carbon-coated LiFePO 4 , the positive electrode slurry contains carbon-coated LiFePO with a volume content of 24% 4 , 1% carbon nanotubes and 75% electrolyte, the negative electrode positive electrode slurry contains carbon-coated LiTi with a volume content of 22% 2 (PO 4 ) 3 , 1% carbon nanotubes and 75% electrolyte, the electrolyte is 4mol / L Li 2 SO 4 The aqueous solution is used as the electrolyte, charged and discharged at a rate of 0.5 C, the voltage range is 0-1.5V, and the capacity retention rate is as follows image 3 shown.

Embodiment 3

[0032] The cathode material is NaMnO 2 , the positive electrode slurry contains NaMnO with a volume content of 27% 2 , 1% carbon black and 72% electrolyte, the negative electrode material is NaV 3 o 8 , the negative electrode slurry contains NaV with a volume content of 27% 3 o 8 , 1% carbon black and 72% electrolyte, the electrolyte is saturated Na 2 SO 4 The aqueous solution is used as the electrolyte, charged and discharged at a rate of 0.2 C, the voltage range is 0.2-1.2V, and the charge and discharge curve is as follows Figure 4 shown.

[0033] The liquid flow water system rechargeable alkali metal ion battery is mainly composed of positive electrode slurry, negative electrode slurry, diaphragm, electrolyte, current collector and positive and negative electrode liquid storage tanks. The positive and negative electrodes of the rechargeable alkali metal ion battery in the liquid flow water system are mixed with the electrolyte respectively to form a fluid state, sep...

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Abstract

The invention discloses a liquid flow water system rechargeable alkali metal ion battery, which includes positive electrode slurry, negative electrode slurry, diaphragm, electrolyte, current collector and positive and negative electrode liquid storage tanks. Materials with a relatively high de/intercalation potential platform; the negative electrode material is a material with a relatively low de/intercalation potential platform that can be intercalated and extracted by alkali metal ions; the electrolyte is an aqueous solution containing an alkali metal compound; the positive and negative active materials are respectively combined with The conductive agent is mixed, and then evenly dispersed in the electrolyte to form a uniform flowable semi-solid positive electrode slurry and negative electrode slurry. The tank is pressed into the battery stack to complete the electrochemical reaction, and then returns to the liquid storage tank after the reaction, and the active material circulates continuously to complete charging and discharging. The invention has the advantages of low price, no environmental pollution, high safety performance, high energy density, etc., and is suitable for large-scale energy storage.

Description

technical field [0001] The invention belongs to the technical field of batteries, in particular to a liquid flow water system rechargeable alkali metal ion battery. Background technique [0002] Since its commercialization in 1990, lithium-ion batteries have been widely used in portable electronic devices such as cameras, notebook computers, and mobile phones due to their high energy density, light weight, and small size. However, due to the flammability of the organic electrolyte used, and the high reactivity of the electrode material and the organic electrolyte caused by improper use such as overcharge or short circuit, the safety and high cost issues have limited large-scale applications to a certain extent. Applications of lithium-ion batteries in energy storage and electric vehicles. The safety of lithium-ion batteries can be improved to a certain extent by selecting high-safety electrode materials, using overcharge protection agents, and adding non-flammable electroly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18H01M8/02
CPCY02E60/528Y02E60/50
Inventor 胡勇胜简泽浪李泓陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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