Nano-power battery composed of lithium manganate and graphene and preparation method thereof

A power battery and graphene technology, applied in the manufacture of electrolyte batteries, secondary batteries, non-aqueous electrolyte batteries, etc., can solve problems such as poor safety, low discharge efficiency, and short service life, and achieve stable internal structure and high discharge efficiency , the effect of short service life

Inactive Publication Date: 2015-04-08
SHENZHEN HONGTAI BATTERY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are many kinds of batteries on the market, including primary batteries and secondary rechargeable batteries, including lead-acid, nickel-metal hydride, nickel-cadmium, and lithium batteries (lithium cobalt oxide, lithium manganate) used in power tools, electric bicycles, electric motorcycles, Due to the small capacity, low power, and low efficiency of electric vehicles and energy storage batteries, it is necessary to use multiple batteries in parallel or in series to increase power and capacity to increase the use time of electronic products. Since each battery has certain differences, The combination of multiple batteries has a greater impact on battery performance and reduces battery life
[0003] In the prior art, the negative electrodes of electric vehicles and energy storage batteries have poor bonding particle size, low specific energy, low power, small capacity, low discharge efficiency, stable internal structure, short service life and poor safety, especially short-circuit phenomena often occur

Method used

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  • Nano-power battery composed of lithium manganate and graphene and preparation method thereof
  • Nano-power battery composed of lithium manganate and graphene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Preparation of slurry: N-methylpyrrolidone is used as a solvent to configure the positive electrode slurry. The materials used in the positive electrode and their weight percentage ratio are: lithium manganate 93%, conductive carbon black 3%, polyvinylidene fluoride 3% %, the balance is the positive current collector, first add polyvinylidene fluoride to N-methylpyrrolidone according to the slurry ratio, and carry out vacuum stirring for 5.5 hours under the condition of circulating water cooling, and then add evenly mixed lithium manganate and the mixture of the conductive agent, after adding the material, stir for 11 hours, and pass the obtained slurry through a 150-mesh sieve once;

[0051]The negative electrode slurry was prepared with deionized water as the medium. The materials used in the negative electrode and their weight percentage ratios were: 89% graphene, 0.5% conductive carbon black, 2% styrene-butadiene rubber, 0.5% sodium carboxymethyl cellulose, and ...

Embodiment 2

[0063] (1) Preparation of slurry: N-methylpyrrolidone is used as a solvent to configure the positive electrode slurry. The materials used in the positive electrode and their weight percentage ratios are: lithium manganate 94%, conductive carbon black 3.5%, polyvinylidene fluoride 3.5% %, the balance is the positive current collector, first add polyvinylidene fluoride to N-methylpyrrolidone according to the slurry ratio, and carry out vacuum stirring for 5.7 hours under the condition of circulating water cooling, and then add evenly mixed lithium manganate and the mixture of conductive agent, after adding the material, stir for 11.5 hours, and pass the obtained slurry through a 150-mesh sieve once;

[0064] The negative electrode slurry was prepared with deionized water as the medium. The materials used in the negative electrode and their weight percentage ratios were: 91% graphene, 1.5% conductive carbon black, 2.5% styrene-butadiene rubber, 1.5% sodium carboxymethyl cellulose,...

Embodiment 3

[0076] (1) Preparation of slurry: N-methylpyrrolidone is used as a solvent to configure the positive electrode slurry. The materials used in the positive electrode and their weight percentage ratios are: lithium manganate 95%, phosphorus flake graphite 1.8%, polyvinylidene fluoride 3.8 %, the balance is the positive current collector, first add polyvinylidene fluoride to N-methylpyrrolidone according to the slurry ratio, and carry out vacuum stirring for 6 hours under the condition of circulating water cooling, and then add evenly mixed lithium manganate and the mixture of conductive agent, add the material and stir for 12 hours, and the obtained slurry is passed through a 150-mesh sieve twice;

[0077] The negative electrode slurry was prepared with deionized water as the medium. The materials used in the negative electrode and their weight percentage ratios were: 92% graphene, 2% conductive carbon black, 2.5% styrene-butadiene rubber, 2% sodium carboxymethyl cellulose, and T...

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Abstract

The invention discloses a nano-power battery composed of lithium manganate and graphene. The nano-power battery comprises anodes, cathodes, diaphragms, electrolyte and a battery housing, wherein the diaphragms are arranged between the anodes and the cathodes; the electrolyte is arranged in the battery housing; the anodes comprises, by weight percent, 92-95 % of anode active substances, 2-4 % of an anode binder, 0-4 % of an anode conductive agent and the balance being an anode current collector; and the cathode comprises, by weight percent, 89-93 % of the graphene, 0-2 % of a cathode conductive agent, 0-2 % of a thickening agent, 2-3 % of a cathode binder and the balance being a cathode current collector. The invention further discloses a preparation method of the power battery composed of the lithium manganate and the graphene. The nano-power battery composed of the lithium manganate and the graphene and the preparation method thereof provided by the invention have advantages of large power, large capacity, high discharge efficiency, long usage life, stabile internal structure and good safety.

Description

technical field [0001] The invention relates to the field of power batteries, in particular to a nano power battery composed of lithium manganate and graphene and a preparation method thereof. Background technique [0002] There are many kinds of batteries on the market, including primary batteries and secondary rechargeable batteries, including lead-acid, nickel-metal hydride, nickel-cadmium, and lithium batteries (lithium cobalt oxide, lithium manganate) used in power tools, electric bicycles, electric motorcycles, Due to the small capacity, low power, and low efficiency of electric vehicles and energy storage batteries, it is necessary to use multiple batteries in parallel or in series to increase power and capacity to increase the use time of electronic products. Since each battery has certain differences, The combination of multiple batteries has a great impact on battery performance and reduces the service life of the battery. [0003] In the prior art, the negative e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525H01M4/13H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 刘素琴
Owner SHENZHEN HONGTAI BATTERY TECH
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