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Aqueous ion battery and application thereof

A technology of ion batteries and water systems, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low specific capacity, poor matching, and low cycle life of aqueous sodium ion batteries, and achieve low cycle life and low specific capacity Effect

Active Publication Date: 2020-04-10
NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] According to one aspect of the present application, a water-based ion battery is provided, which solves the problem that the existing negative electrode material has poor stability in the water-based electrolyte, and hydrogen evolution side reactions occur during discharge, resulting in low cycle life of the water-based sodium-ion battery and low specific capacity. Low; the electrode preparation of the existing negative electrode material and the battery assembly process are complicated, the requirements for the operating workshop are high, and the material preparation cost is high, resulting in an increase in the cost of the entire battery manufacturing; the existing negative electrode material and the positive electrode sodium intercalation material exist. The problem of poor matching (such as the mass ratio of positive and negative electrode materials, the process parameters of electrode preparation, and the potential voltage window, etc.) leads to low cycle life and low specific capacity of the battery

Method used

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  • Aqueous ion battery and application thereof
  • Aqueous ion battery and application thereof
  • Aqueous ion battery and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] Example 1 Synthesis of negative electrode active material

[0101] Step A: Add 52.08g 1,4,5,8-naphthalenetetracarboxylic anhydride powder and 2.54mL monohydrate ethylenediamine solution to 400mL N-dimethylformamide (DMF) solution at a molar ratio of 1:1.01, keep Magnetic stirring. The reaction vessel is a glass flask. The flask was shielded with argon. The flask was transferred to a 50°C oil bath and gradually warmed to 150°C. The reaction was maintained at this temperature for 4 hours.

[0102] Step B: The resultant is collected, centrifuged, and the supernatant is removed. The lower centrifugation pellet was diluted with N-dimethylformamide and washed a second time. Then wash with ethanol and centrifuge. The final mass was dried in a vacuum oven to obtain a dry powder.

[0103] Step C: the above dry powder is sintered in a tube furnace, protected by an argon atmosphere. The sintering temperature was 350° C., and the sintering time was 3 hours, and a sample 1 w...

Embodiment 2

[0104] Example 2 Preparation of Electrodes

[0105] negative electrode

[0106] Active material: polyimide organic material sample 1 containing naphthalene ring

[0107] Conductive agent: Conductive carbon black (Super P carbon)

[0108] Binder: Polytetrafluoroethylene (PTFE) emulsion

[0109] Collector: stainless steel mesh

[0110] Preparation process: The active material, conductive carbon black and binder are mixed in an ethanol solution in a mass ratio of 6:3:1 to form a slurry, coated on a stainless steel mesh, and then vacuum dried. The electrode area is about 1.5cm 2 , the single surface density of the active material is 2 mg cm -2 .

Embodiment 3

[0111] Example 3 Preparation of Electrodes

[0112] positive electrode:

[0113] Active material: sodium manganate (NaMnO 2 , i.e. λ-MnO intercalated with sodium ions 2 )

[0114] Conductive agent: Conductive carbon black (Super P carbon)

[0115] Binder: Polytetrafluoroethylene (PTFE) emulsion

[0116] Collector: stainless steel mesh

[0117] Process: The active material, conductive carbon black and binder are mixed and stirred in ethanol according to the mass ratio of 8:1:1 to form a slurry, which is coated on the stainless steel mesh, and then vacuum dried. The electrode area is about 1.5cm 2 , the single surface density of the active material is 5 mg cm -2 .

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Abstract

The application discloses an aqueous ion battery. The aqueous ion battery comprises: an electrolyte which is an aqueous solution containing an electrolyte; a negative electrode containing a negative electrode active material; a negative electrode active material which includes polyimide containing a naphthalene ring; and a positive electrode, wherein a positive electrode comprises a positive electrode active material comprising a sodium-embedded material. The problems that the cycle life of the battery is short and the specific capacity of the battery is low due to poor matching (such as the mass ratio of positive and negative electrode material, process parameters of electrode preparation and a potential voltage window) of an existing negative electrode material and a positive electrode sodium-embedded material are solved; and moreover, the electrode preparation of the existing negative electrode material and battery assembly processes are complex, the condition requirements on an operation workshop are high, and the material preparation cost is high, so that the production and manufacturing cost of the whole battery is increased.

Description

technical field [0001] The application relates to an aqueous ion battery, which belongs to the field of batteries. Background technique [0002] Aqueous ion batteries are battery systems that use water as the electrolyte. Compared with other non-aqueous ion batteries, aqueous ion batteries have the advantages of good safety performance, high ion conductivity, low price and easy availability. In addition, water-based batteries can complete battery production, assembly, sealing and other operations without an anhydrous and oxygen-free environment, which greatly reduces the production and manufacturing costs of batteries. Therefore, it has gradually attracted attention and is very suitable for the large-scale energy storage market. Currently commercially used energy storage batteries are mainly lead-acid batteries, lithium iron phosphate or ternary power batteries. Among them, lead-acid batteries have short service life and high pollution. Its negative electrode uses metal l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/60H01M10/36
CPCH01M4/608H01M10/36H01M2004/027Y02E60/10
Inventor 王晓东李忆非任江涛王耀国
Owner NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST
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