Water-based ion battery negative electrode material, aqueous ion battery negative electrode and preparation method thereof, and aqueous ion battery

A technology of ion battery and negative electrode material, applied in electrode manufacturing, battery electrode, electrode current collector coating, etc., can solve problems such as low capacity, and achieve the effect of excellent water-based lithium-ion battery performance

Active Publication Date: 2020-04-24
NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among organic material electrodes, the battery performance obtained by using polyvinylidene fluoride is usually more stable, but the capacity may be slightly lower than the electrode using polytetrafluoroethylene

Method used

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  • Water-based ion battery negative electrode material, aqueous ion battery negative electrode and preparation method thereof, and aqueous ion battery
  • Water-based ion battery negative electrode material, aqueous ion battery negative electrode and preparation method thereof, and aqueous ion battery
  • Water-based ion battery negative electrode material, aqueous ion battery negative electrode and preparation method thereof, and aqueous ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Embodiment 1 Synthesis of negative electrode active material

[0104] Step A: Add a solution of N-dimethylformamide (DMF) into a glass flask under the condition of heating in an oil bath at 50°C, and then add 1,4,5,8-naphthalene tetramethyl at a molar mass ratio of 1:1.05 The acid anhydride powder was dissolved in ethylenediamine and kept stirring, the flask was protected by argon, and the temperature was gradually raised to 150° C. and kept for 6 hours.

[0105]Step B: After the reaction is completed, centrifuge the turbid solution, remove the supernatant, wash with N-dimethylformamide, perform a second centrifugation and remove the supernatant, and then use ethanol to wash and centrifuge. The final material was dried in a vacuum oven to obtain a powdery material, designated as sample 1.

Embodiment 2

[0106] The preparation of embodiment 2 electrodes

[0107] negative electrode

[0108] Active material: polyimide organic material (sample 1)

[0109] Conductive agent: conductive carbon black (Super P carbon)

[0110] Binder: sodium carboxymethylcellulose (CMC) + styrene-butadiene rubber (SBR)

[0111] Collector: 0.1mm thick stainless steel mesh

[0112] Preparation process: The active material, conductive carbon black, sodium carboxymethyl cellulose, and styrene-butadiene rubber are mixed in pure water in a mass ratio of 8:1:0.2:0.8 to form a slurry, coated on a stainless steel mesh, and then baked Dry. Sampling and preparation with a tablet machine, the electrode area is about 1.5cm 2 , the areal density of the active substance is about 1 mg cm -2 , recorded as F-1.

[0113] The active material, conductive carbon black, sodium carboxymethyl cellulose, and styrene-butadiene rubber are mixed in pure water in a mass ratio of 8:1:0.15:0.75 to form a slurry, which is coat...

Embodiment 3

[0115] The preparation of embodiment 3 electrodes

[0116] positive electrode:

[0117] Active material: lithium manganese oxide (LiMn 2 o 4 )

[0118] Conductive agent: conductive carbon black (Super P carbon)

[0119] Binder: polyvinylidene fluoride (PVDF) emulsion

[0120] Collector: 0.1mm thick stainless steel mesh

[0121] Preparation process: Active material, conductive agent, and binder are mixed in N-methylpyrrolidone (NMP) in a mass ratio of 8:1:1 to form a slurry, coated on a stainless steel mesh, and then vacuum-dried. The electrode area is about 1.5cm 2 , the areal density of the active substance is about 5 mg cm -2 , denoted as Z-1.

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Abstract

The invention discloses a negative electrode material of a water-based ion battery. The negative electrode material of the water-based ion battery comprises a negative electrode active material, a conductive agent and a binder, wherein the negative electrode active material comprises polyimide. The binder contains sodium carboxymethyl cellulose and butadiene styrene rubber. According to the water-based ion battery negative electrode material, an electrode material is prepared from a binder system of sodium carboxymethyl cellulose (CMC) and styrene butadiene rubber (SBR) according to a certainratio in a water-based battery taking a naphthalene ring-containing polyimide material as a negative electrode for the first time, and matches a lithium manganate positive electrode, so that excellentwater-based lithium ion battery performance is obtained.

Description

technical field [0001] The present application relates to a negative electrode of an aqueous ion battery, which belongs to the field of lithium ion battery energy storage. Background technique [0002] Due to the advantages of high voltage and high energy density, lithium-ion batteries have been widely recognized since they were launched in the 1990s, and now they have occupied a dominant position in the consumer electronics market and the new energy vehicle power battery industry. Traditional lithium-ion batteries mainly use organic carbonate electrolytes because they are well compatible with lithium cobalt oxide or ternary positive electrodes and graphite negative electrode materials, and can withstand the high voltage of lithium cobalt oxide / graphite system lithium-ion batteries. In recent years, with the improvement of people's requirements for battery safety, environmental protection and cost, aqueous electrolytes have begun to receive people's attention. Compared with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/60H01M4/62H01M4/04H01M10/36
CPCH01M4/0404H01M4/606H01M4/608H01M4/621H01M10/36Y02E60/10
Inventor 任江涛李忆非王晓东王耀国
Owner NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST
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