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Negative electrode material of secondary battery

A negative electrode material and secondary battery technology, applied in the field of electrochemical energy storage, can solve problems such as battery design difficulties, and achieve the effect of excellent battery performance and guaranteed stability

Inactive Publication Date: 2017-01-04
NANJING JINGYAN NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of traditional Zn / Zn 2+ electrodes, inevitably face the problem of zinc dendrites, making battery design very difficult

Method used

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  • Negative electrode material of secondary battery
  • Negative electrode material of secondary battery
  • Negative electrode material of secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 2

[0038] The preparation of embodiment 1 secondary battery

[0039] 1. Preparation of positive electrode sheet: LiMn 2 o 4 It is the positive electrode active material, according to the positive electrode active material 80%: conductive carbon black 10%, PTFE emulsion 10% (only count the quality of PTFE in the emulsion), mix evenly, press on 150 mesh SUS304 stainless steel mesh, cut into size 10mmX10mm, weight 50mg . Dry at 120°C for 2 hours to form a positive electrode sheet.

[0040] 2. Preparation of negative electrode active material: In a 500mL three-neck flask equipped with stirring, reflux condenser and thermometer, add 40g of acrylamide (AM) and a certain amount of N,N'-methylenebisacrylamide (MBA) respectively In the water phase, stir until completely dissolved, pass N 2 About 20min, remove the air. Then heat up to 50°C, and dropwise add 0.15gK 2 S 2 o 8 and 0.15gKHSO 3 aqueous solution, in N 2 Maintain this temperature reaction under protection, and stop the ...

Embodiment 2

[0048] The battery is manufactured in the same manner as in Example 1, the difference is

[0049] The negative electrode material is prepared as follows: take 20 grams of aminophosphonic acid chelating resin, disperse it in 100 grams of distilled water, add 80 grams of lead methanesulfonate, stir at 60 ° C for 12 hours, wash with distilled water, and dry to obtain the lead-based negative electrode material.

[0050] Using a planetary ball mill, grind the anode material at 400 rpm for 4 hours. Disperse according to the ratio of negative electrode material: conductive graphite (Super-P type conductive graphite of Temegao Company): lead powder: PTFE is 70:7:15:8, and press it into a pole piece of 10mmX10mm and a weight of 160mg. The theoretical capacity of the battery is 5mAh, and the charge and discharge curve is as follows: Figure 7 shown.

[0051] It can be seen that the negative electrode material described in the present invention is not a single material, but a type of c...

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PUM

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Abstract

A negative electrode material of a secondary battery is characterized by mainly comprising a framework, a chelated radical and fixed active substance divalent or multivalent metal ions, wherein the framework is polyacrylic acid, the chelated radical is fixed on the framework through chemical bonds, and the chelated radical is an amino phosphonic acid radical and can form an ionic bond or a coordination bond with the active substance divalent or multivalent metal ions. The active substance is divalent or multivalent metal ions which can be reduced to a lower valence state, the metal ions serving as the active substance are reduced to the lower-valent state or a metal elemental state during charging, and the metal ions are reversibly generated and forms the ionic bond or the coordination bond with the chelated radical. The negative electrode material can be collocated with many positive electrode materials to form the battery.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, and in particular relates to a secondary battery negative electrode material. Background technique [0002] The current demand for energy storage technology far exceeds any time in human history. Whether it is new energy vehicles, or future wind energy, supporting solar power plants, or urban smart grids, all require a large number of reliable energy storage technologies. [0003] The current commercialized battery technology is mainly the old lead-acid battery that is harmful to the environment. The emerging lithium-ion battery has achieved great success in portable devices, but in the field of large-scale power or energy storage, due to the price, Factors such as safety are constrained. Therefore, it is a very urgent task to develop a safe and cheap rechargeable battery. [0004] In 1994, Wu Li from the research group of Jeff Dahn in Canada published an article named as VO in SC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M10/05
CPCH01M4/48H01M10/05Y02E60/10
Inventor 颜竞王静
Owner NANJING JINGYAN NEW ENERGY TECH