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Secondary Li-Mn soft-packed battery and preparation method thereof

A soft packaging battery, lithium manganese technology, applied in secondary batteries, battery electrodes, battery pack components, etc., can solve the problems of poor high current output performance, difficult and flexible design of external dimensions, affecting battery charge-discharge cycle performance, etc. The effect of low cost, excellent charge-discharge and cycle performance

Active Publication Date: 2014-03-26
武汉孚安特科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the capacity of the primary button battery is limited. If you need to replace the battery, you need to find the manufacturer for after-sales service, which is a troublesome thing for end users. Commercial use, but the external dimensions are not easy to design flexibly, and the high current output performance is poor
[0003] Traditional secondary lithium-manganese batteries mostly use pure lithium sheets, but pure lithium sheets have some disadvantages, that is, the dissolution and deposition of lithium during charging will make the surface of the negative electrode uneven, and the deposited lithium will partially lose its activity, resulting in lithium branches. Crystal seriously affects the charge-discharge cycle performance of the battery

Method used

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  • Secondary Li-Mn soft-packed battery and preparation method thereof
  • Secondary Li-Mn soft-packed battery and preparation method thereof

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preparation example Construction

[0033] The preparation method of the secondary lithium manganese flexible packaging battery is as follows:

[0034] a. Preparation of lithium manganese composite oxide Li X MnO 2 , where 0.2≤X≤0.5;

[0035] Preparation of lithium manganese composite oxide Li 0.2～0.5 MnO 2 The specific process is: the LiNO 3 Add electrolytic manganese dioxide into a ball mill, mix evenly, and then place in a muffle furnace for 2-6 hours at 240-280°C, preferably at 260°C for 4 hours, at 320-370°C for 12-17 hours, preferably at 350°C for 15 hours, Obtain lithium manganese composite oxide Li 0.2～0.5 MnO 2 ;

[0036] b. Preparation of positive electrode

[0037] Mix and dissolve the lithium-manganese composite oxide, conductive agent, binder and pure water, stir evenly and roll it into a film on a double-roller machine. After drying, press the film and aluminum mesh to form and dry;

[0038] Among them, the mass percentage of lithium manganese composite oxide, conductive agent and binder i...

Embodiment 1

[0045] Lithium-manganese composite oxide (Li 0.2 MnO 2 ): Conductive agent: adhesive = 80:10:10 ratio of ingredients, add an appropriate amount of pure water, stir evenly, roll on a double-roller machine to form a film, after drying, press the film and aluminum mesh to form, cut The positive and negative electrodes are separated by a diaphragm, and the diaphragm is rolled into a square together with the positive and negative electrodes. After the roll is finished, the winding core is wrapped with tape to form a wound-type battery; In the membrane shell, sealing, injection of electrolyte, aging and secondary sealing molding.

Embodiment 2

[0047] Lithium-manganese composite oxide (Li 0.2 MnO 2 ): Conductive agent: adhesive = 88:7:5 ratio of ingredients, add an appropriate amount of pure water, stir evenly, roll into a film on a double-roller machine, after drying, press the film and aluminum mesh to form, cut The positive and negative electrodes are separated by a diaphragm, and the diaphragm is rolled into a square together with the positive and negative electrodes. After the roll is finished, the winding core is wrapped with tape to form a wound-type battery; In the membrane shell, sealing, injection of electrolyte, aging and secondary sealing molding.

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Abstract

The invention relates to a secondary Li-Mn soft-packed battery and a preparation method thereof. The secondary Li-Mn soft-packed battery comprises an anode, a cathode, an anode lug connected with the anode, a cathode lug connected with the cathode, a membrane for separating the anode from the cathode, and electrolyte among the anode, the cathode and the membrane, and further comprises an aluminum-plastic film housing, wherein a battery cell adopts a winding-type structure; after winding, the battery cell is square; anodal active material is Li(0.2 to 0.5)MnO2. As the battery adopts cheap manganese dioxide as a raw material to prepare the anodal active material, the cost is low, but the 80 mAh secondary Li-Mn soft-packed battery is superior in charging, discharging and circulating properties; moreover, as the housing is the aluminum-plastic film housing, and the battery cell is the winding-type square battery cell, the secondary Li-Mn battery is a square soft-packed battery.

Description

technical field [0001] The invention relates to a secondary lithium manganese battery, in particular to a secondary lithium manganese soft package battery and a preparation method. Background technique [0002] With the development of modern science and technology, high-energy, small-sized primary button-type lithium-manganese dioxide batteries have been widely used, especially in computer motherboards, mobile phones, notebook computers, electronic clocks and hand-held terminal button-type instruments, etc. . However, the capacity of the primary button battery is limited. If you need to replace the battery, you need to find the manufacturer for after-sales service, which is a troublesome thing for end users. Commercial use, but the external dimensions are not easy to design flexibly, and the high-current output performance is poor. [0003] Traditional secondary lithium-manganese batteries mostly use pure lithium sheets, but pure lithium sheets have some disadvantages, tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587H01M10/0525H01M4/505
CPCY02E60/122H01M4/382H01M4/463H01M4/505H01M4/625H01M4/661H01M4/745H01M10/0587H01M50/116Y02E60/10Y02P70/50
Inventor 代江华周军
Owner 武汉孚安特科技有限公司