CN105655538A - Oily system preparation method of lithium battery positive electrode plate - Google Patents
Oily system preparation method of lithium battery positive electrode plate Download PDFInfo
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- CN105655538A CN105655538A CN201410680398.8A CN201410680398A CN105655538A CN 105655538 A CN105655538 A CN 105655538A CN 201410680398 A CN201410680398 A CN 201410680398A CN 105655538 A CN105655538 A CN 105655538A
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- positive electrode
- lithium battery
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Abstract
An oily system preparation method of a lithium battery positive electrode plate comprises the raw materials: an aluminum foil, N-methyl pyrrolidone, a positive electrode material, conductive carbon black and polyvinylidene fluoride; the lithium battery positive electrode plate is prepared and formed by the following steps of mixing, feeding, coating, drying, tabletting, and cutting. The prepared positive electrode plate has the advantages of large discharge capacity and good cycle performance. The method is simple in process and easy to operate; the stable-quality lithium battery positive electrode plate is easily obtained; a battery formed by the positive electrode plate is high in qualified rate and has good use effect.
Description
Technical field
The present invention relates to field of lithium, it is specifically related to the oleaginous system preparation method of a kind of positive plate of lithium battery.
Background technology
Lithium cell has operating temperature range width, discharging voltage balance, self-discharge rate is low, it may also be useful to the advantages such as life-span length, the fields such as various field, particularly space flight and aviation, military affairs, long-lived instrument, material flow tracking, automotive electronics, mobile digital product it are widely used in. In recent years, along with science and technology development, the function of electronics is constantly upgraded, and therefore the manufacture craft of lithium cell is had higher requirement, and has become the primary study direction of battery industry. Along with the increase of the development of science and technology, material and labour cost, doing over again trouble to avoid the later stage, the control of product is had more and more higher requirement by enterprise. Particularly at the elementary assembling stage of lithium cell, it is necessary to consider the problem of each side.
Therefore, the problems referred to above are the problems should paid attention in the preparation process of positive plate of lithium battery and solve.
Summary of the invention
For above-mentioned Problems existing, the present invention provides the oleaginous system preparation method of a kind of positive plate of lithium battery.
The technical solution of the present invention is: the oleaginous system preparation method of a kind of positive plate of lithium battery, and raw material comprises aluminium foil, N-Methyl pyrrolidone, positive electrode material, conductive carbon black and poly(vinylidene fluoride), adopts following steps to make shaping:
A. mix: N-Methyl pyrrolidone and poly(vinylidene fluoride) are that 1:1 is uniformly mixed according to mass ratio;
B. feed in raw material: after mixing, positive electrode material and conductive carbon black are added in mixed solution, stir to obtain black soup compound;
C. being coated with: black soup compound is placed on aluminium foil, employing scraper is evenly coated with in the form of sheets and makes it be attached to aluminium foil surface;
D. dry: the positive electrode material made is coated with to be placed in baking oven and dries, move in vacuum drying oven subsequently and dry further;
E. compressing tablet: adopt twin rollers or tabletting machine to oven dry material compression moulding;
F. cutting: adopt slitter to be cut into required specification the positive plate made.
Further improvement of the present invention is: described positive electrode material adopts iron lithium phosphate.
Further improvement of the present invention is: in steps d, the bake out temperature in baking oven is controlled to 60 ~ 80 DEG C, and drying time is controlled to 4 ~ 8h, and vacuum drying drying temperature is controlled to 120 ~ 140 DEG C, and the vacuum-drying time is 8 ~ 12h.
Further improvement of the present invention is: in step b, feeding quantity is positive electrode material according to mass ratio: conductive carbon black: poly(vinylidene fluoride)=7.5 ~ 9.0:0.5 ~ 1.0:0.5 ~ 1.0 add.
The invention has the beneficial effects as follows: the present invention adopts oleaginous system to make the positive plate of battery, this kind of electrode slice loading capacity is big, good cycle. This method technique is simple, is easy to operation, just can obtain the anode electrode sheet of the lithium cell of steady quality easily, adopts this anode electrode sheet to make the battery qualification rate height formed, has good result of use.
Embodiment
In order to deepen the understanding of the present invention, the present invention being described in further detail below in conjunction with embodiment, protection scope of the present invention, only for explaining the present invention, is not formed and limits by this embodiment.
The present embodiment provides the oleaginous system preparation method of a kind of positive plate of lithium battery, and raw material comprises aluminium foil, N-Methyl pyrrolidone, positive electrode material, conductive carbon black and poly(vinylidene fluoride), adopts following steps to make shaping:
A. mix: N-Methyl pyrrolidone and poly(vinylidene fluoride) are that 1:1 is uniformly mixed according to mass ratio;
B. feed in raw material: after mixing, positive electrode material and conductive carbon black are added in mixed solution, stir to obtain black soup compound;
C. being coated with: black soup compound is placed on aluminium foil, employing scraper is evenly coated with in the form of sheets and makes it be attached to aluminium foil surface;
D. dry: the positive electrode material made is coated with to be placed in baking oven and dries, move in vacuum drying oven subsequently and dry further;
E. compressing tablet: adopt twin rollers or tabletting machine to oven dry material compression moulding;
F. cutting: adopt slitter to be cut into required specification the positive plate made.
Described positive electrode material adopts iron lithium phosphate. In steps d, the bake out temperature in baking oven is controlled to 60 ~ 80 DEG C, it is preferable to 70 DEG C, drying time is controlled to 4 ~ 8h, it is preferable to 6h, and vacuum drying drying temperature is controlled to 120 ~ 140 DEG C, it is preferable to 130 DEG C, and the vacuum-drying time is 8 ~ 12h, it is preferable to 10h. In step b, feeding quantity is positive electrode material according to mass ratio: conductive carbon black: poly(vinylidene fluoride)=7.5 ~ 9.0:0.5 ~ 1.0:0.5 ~ 1.0 add, and mass ratio is preferably positive electrode material: conductive carbon black: poly(vinylidene fluoride)=8:1:1.
The useful effect of the present embodiment is: the present invention adopts oleaginous system to make the positive plate of battery, and this kind of electrode slice loading capacity is big, good cycle. This method technique is simple, is easy to operation, just can obtain the anode electrode sheet of the lithium cell of steady quality easily, adopts this anode electrode sheet to make the battery qualification rate height formed, has good result of use.
Claims (4)
1. the oleaginous system preparation method of a positive plate of lithium battery, it is characterised in that: raw material comprises aluminium foil, N-Methyl pyrrolidone, positive electrode material, conductive carbon black and poly(vinylidene fluoride), adopts following steps to make shaping:
A. mix: N-Methyl pyrrolidone and poly(vinylidene fluoride) are that 1:1 is uniformly mixed according to mass ratio;
B. feed in raw material: after mixing, positive electrode material and conductive carbon black are added in mixed solution, stir to obtain black soup compound;
C. being coated with: black soup compound is placed on aluminium foil, employing scraper is evenly coated with in the form of sheets and makes it be attached to aluminium foil surface;
D. dry: the positive electrode material made is coated with to be placed in baking oven and dries, move in vacuum drying oven subsequently and dry further;
E. compressing tablet: adopt twin rollers or tabletting machine to oven dry material compression moulding;
F. cutting: adopt slitter to be cut into required specification the positive plate made.
2. the oleaginous system preparation method of a kind of positive plate of lithium battery according to claim 1, it is characterised in that: described positive electrode material adopts iron lithium phosphate.
3. the oleaginous system preparation method of a kind of positive plate of lithium battery according to claim 1, it is characterized in that: in steps d, the bake out temperature in baking oven is controlled to 60 ~ 80 DEG C, drying time is controlled to 4 ~ 8h, and vacuum drying drying temperature is controlled to 120 ~ 140 DEG C, and the vacuum-drying time is 8 ~ 12h.
4. the oleaginous system preparation method of a kind of positive plate of lithium battery according to claim 1, it is characterised in that: in step b, feeding quantity is positive electrode material according to mass ratio: conductive carbon black: poly(vinylidene fluoride)=7.5 ~ 9.0:0.5 ~ 1.0:0.5 ~ 1.0 add.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410680398.8A CN105655538A (en) | 2014-11-25 | 2014-11-25 | Oily system preparation method of lithium battery positive electrode plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410680398.8A CN105655538A (en) | 2014-11-25 | 2014-11-25 | Oily system preparation method of lithium battery positive electrode plate |
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| CN105655538A true CN105655538A (en) | 2016-06-08 |
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| CN201410680398.8A Pending CN105655538A (en) | 2014-11-25 | 2014-11-25 | Oily system preparation method of lithium battery positive electrode plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112201770A (en) * | 2020-10-15 | 2021-01-08 | 惠州亿纬锂能股份有限公司 | Electrode plate, preparation method thereof and lithium battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044661A (en) * | 2009-10-23 | 2011-05-04 | 比克国际(天津)有限公司 | Method for preparing lithium ion battery slurry |
| CN102324496A (en) * | 2011-09-19 | 2012-01-18 | 江苏乐能电池股份有限公司 | Tabletting method for lithium ion battery positive plate |
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2014
- 2014-11-25 CN CN201410680398.8A patent/CN105655538A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044661A (en) * | 2009-10-23 | 2011-05-04 | 比克国际(天津)有限公司 | Method for preparing lithium ion battery slurry |
| CN102324496A (en) * | 2011-09-19 | 2012-01-18 | 江苏乐能电池股份有限公司 | Tabletting method for lithium ion battery positive plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112201770A (en) * | 2020-10-15 | 2021-01-08 | 惠州亿纬锂能股份有限公司 | Electrode plate, preparation method thereof and lithium battery |
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Application publication date: 20160608 |