High-capacity organic lithium storage material and application thereof

An organic storage, high-capacity technology, applied in the direction of electrical components, electrochemical generators, battery electrodes, etc., can solve the problems that restrict the development and large-scale application of organic lithium storage materials, poor conductivity, and increased molecular weight of materials, and achieve excellent battery life. Chemical cycle stability, cost and cost reduction, good elasticity and toughness

Active Publication Date: 2017-06-13
苏州华赢新能源材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, most organic lithium storage materials have shown low lithium storage capacity, poor high-rate charge-discharge performance and short cycle life. For example, pyrene-4,5,9,10 tetraketone has a specific capacity of only 275mAh/g. , and the capacity decreases to 120mAh/g after 20 cycles; naphthoquinone has a specific capacity of 190mAh/g, and the capacity retention rate after 100 cycles is less than 40%; anthraquinone has a specific capacity of 250mAh/g, and after 100 cycles Capacity decreased to 30mAh/g; 2-vinyl-4,8-dihydrobenzo-[1,2-b:4,5-b']-dithiophene-4,8-dione organic material has 225mAh/ g of specific capacity, the capacity decreases to 50mAh/g after 25 cycles
The main reason for the poor cycle performance of the above-mentioned organic lithium storage materials is related to their solubility in organic carbonate solvents. The loss of active materia

Method used

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  • High-capacity organic lithium storage material and application thereof
  • High-capacity organic lithium storage material and application thereof
  • High-capacity organic lithium storage material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

[0025] Embodiment 1 provides an application of a high-capacity organic lithium storage material for making lithium battery electrodes, specifically:

[0026] (a) Mix 5g of maleic acid, 1g of PVDF (commercially available), 4g of acetylene black (commercially available) in 20g of N-methylpyrrolidone (NMP, commercially available) to make electrode slurry;

[0027] (b) Coat the electrode slurry on a copper foil current collector (commercially available) and use 2MPa / cm after drying 2 Press at a pressure of, and dry for 10 hours at 140°C and vacuum after slitting;

[0028] The SEM image of the prepared maleic acid electrode sheet is as follows figure 1 As shown, it can be seen that the maleic acid pellets and the acetylene black conductive agent are uniformly dispersed, and the electrode thickness is about 10 μm.

[0029] The maleic acid electrode will be prepared according to the existing battery manufacturing method: using lithium metal as the counter electrode to assemb...

Example Embodiment

[0030] Example 2-12

[0031] Examples 2-12 respectively provide an application of a high-capacity organic lithium storage material. The difference lies in the types and quality of organic lithium storage materials, binders, conductive agents, and dispersants. See Table 1 for details; among them, the insoluble rich The first reversible capacity of the electrode made of iron maleate is slightly lower, which may be the reason for its more active electrochemical properties.

[0032] Table 1 The formula ratio table of the application of high-capacity organic lithium storage materials in Example 2-12

[0033]

[0034]

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Abstract

The invention relates to a high-capacity organic lithium storage material. The high-capacity organic lithium storage material is selected from one or a mixture of organic acids with abutenedioic acid conjugated bond structure and salts of the organic acids. By selecting one or the mixture of the organic acids with the butenedioic acid conjugated bond structure and the salts of the organic acids, lithium storage can be realized through transformation of conjugated double bonds in molecular space, not only can lithium-ions be stored on carboxyl groups, but also Li2O can be formed reversibly through chemical bond change of carboxyl sites and stored in electrode micropores, the material contains many active lithium storage sites, and one molecule with a butenedioic acid structure can store 8-12 lithium-ions.

Description

technical field [0001] The invention belongs to the field of battery or supercapacitor electrode materials, and relates to a lithium storage material, in particular to a high-capacity, high-power and long-life organic lithium storage material and its application. Background technique [0002] With the development of power vehicles and large-scale energy storage technology, high-capacity, high-power and long-life batteries and capacitors have become the most promising chemical energy storage power sources. Active materials are the key and core of chemical energy storage devices such as lithium-ion batteries, sodium-ion batteries, and supercapacitors. There are many traditional inorganic lithium storage materials, and they have been widely used. However, the inorganic lithium storage materials are limited by factors such as stoichiometric ratio, and the lithium storage capacity is limited; not only that, but the inorganic lithium storage materials themselves are brittle. The ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/60H01M10/0525H01M4/139
CPCH01M4/139H01M4/364H01M4/60H01M10/0525Y02E60/10
Inventor 王艳郑洪河曲群婷吴永德朱国斌
Owner 苏州华赢新能源材料科技有限公司
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