CN107546368A - Nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method - Google Patents
Nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method Download PDFInfo
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- CN107546368A CN107546368A CN201710790883.4A CN201710790883A CN107546368A CN 107546368 A CN107546368 A CN 107546368A CN 201710790883 A CN201710790883 A CN 201710790883A CN 107546368 A CN107546368 A CN 107546368A
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- nickle cobalt
- ion battery
- lithium manganate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
Nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method, comprises the following steps：1) quality proportioning is pressed, nickle cobalt lithium manganate active powder, acetylene black and PVDF is weighed, is placed in container, and N methyl pyrrolidones are added into container, after adjusting viscosity, 8~10h of stirring to well mixed, acquisition anode sizing agent；2) anode sizing agent is formed into coated sample coated on aluminium foil；3) described coated sample is subjected to vacuum freeze drying processing, forms dried sample；Wherein：Described vacuum freeze drying temperature is 50~30 DEG C, and the vacuum freeze drying time is 12~16h；4) dried sample is obtained into nickle cobalt lithium manganate ternary based lithium-ion battery positive plate through tabletting and sectioning.This method technological process is simple, and cost is low, and prepared battery anode slice is functional, after tested, has higher first discharge specific capacity and discharging efficiency.
Description
Technical field：
The invention belongs to cell positive material preparing technical field, and in particular to nickle cobalt lithium manganate ternary lithium ion battery is just
Pole piece preparation method.
Background technology：
One of the research emphasis for improving performance of lithium ion battery be exploitation high power capacity, high circulation stability, high security and
The positive electrode of hypotoxicity.But the drying means of traditional positive electrode is all vacuum drying, is prepared using conventional drying process
Nickle cobalt lithium manganate ternary based lithium-ion battery positive plate phenomena such as uniformity is poor, powder aggregation be present, directly affect material
Chemical property, the field of batteries for entering innovation day can not be satisfied with, so the research of new dry technology is imperative.
The content of the invention：
The purpose of the present invention is to overcome above-mentioned the shortcomings of the prior art, there is provided a kind of nickle cobalt lithium manganate ternary lithium ion
Anode piece preparation method, positive electrode is functional after this method can make drying, and discharging efficiency is excellent.
To achieve the above object, the present invention uses following technical scheme：
Nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method, comprises the following steps：
(1) quality proportioning, nickle cobalt lithium manganate active powder are pressed：Acetylene black：PVDF=(4~6):(0.5~0.75):(0.5
~0.75) nickle cobalt lithium manganate active powder, acetylene black and PVDF, are weighed, is placed in container, and N- methyl pyrroles are added into container
Pyrrolidone, after adjusting viscosity, 8~10h of stirring to well mixed, acquisition anode sizing agent；
(2) anode sizing agent is formed into coated sample coated on aluminium foil；
(3) described coated sample is subjected to vacuum freeze drying processing, forms dried sample；Wherein：Institute
The vacuum freeze drying temperature stated is -50~-30 DEG C, and the vacuum freeze drying time is 12~16h；
(4) nickle cobalt lithium manganate ternary based lithium-ion battery positive plate is made through tabletting and sectioning in dried sample.
In described step (1), nickle cobalt lithium manganate molecular formula is LiNixCoyMnzO2, wherein：X+y+z=1, x>0, y>0,
z>0。
In described step (1), agitating mode is magnetic agitation.
In described step (2), aluminium foil is attached on smooth surface and operated.
In described step (2), described smooth surface is glass plate.
In described step (3), vacuum freeze drying processing is carried out in vacuum freezing drying oven.
In described step (4), after the nickle cobalt lithium manganate ternary based lithium-ion battery positive plate assembling of preparation is made into battery,
Pass through charge-discharge test, first discharge specific capacity >=162mAh/g, discharging efficiency >=85%.
Nickle cobalt lithium manganate ternary based lithium-ion battery positive plate performance is improved by freeze-drying method, vacuum freeze drying
Also known as literization is freeze-dried, and its general principle is by the moisture sharp freezing in material, is then made by way of vacuumizing
Ice crystal is converted into gaseous state, so that material dewatering.Expansive force of the water in phase transition process causes original grain close to each other
Son is flared, while the generation of ice is fixed its position, prevents particle from assembling acquisition component in the drying process and uniformly mixing
Compound, at the same be advantageous to lithium ion by, improve phase charge-discharge performance.
Beneficial effects of the present invention：
(1) method that the present invention prepares nickle cobalt lithium manganate ternary based lithium-ion battery positive plate, technological process is simple, cost
It is low；
(2) the nickle cobalt lithium manganate ternary based lithium-ion battery positive plate prepared using the method for the present invention has good property
Can, discharging efficiency is excellent, first discharge specific capacity >=162mAh/g, discharging efficiency >=85%.
Embodiment：
With reference to embodiment, the present invention is described in further detail.
Embodiment 1
Nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method, comprises the following steps：
(1) quality proportioning is pressed, weighs LiNi respectively1/3Co1/3Mn1/3O2Active powder 0.4g, acetylene black 0.05g and PVDF
0.05g, it is placed in measuring cup, and 1-METHYLPYRROLIDONE is added into measuring cup, after adjusting viscosity, magnetic agitation 10h is to mixed
Close uniform, acquisition anode sizing agent；
(2) by aluminium foil patch on a glass, anode sizing agent is formed into coated sample coated on aluminium foil；
(3) by described coated sample in vacuum freezing drying oven, vacuum freeze drying processing is carried out, is formed dry
Sample after dry；Wherein：Described vacuum freeze drying temperature is -50 DEG C, and the vacuum freeze drying time is 16h；
(4) nickle cobalt lithium manganate ternary based lithium-ion battery positive plate is made through tabletting and sectioning in dried sample；
After the nickle cobalt lithium manganate ternary based lithium-ion battery positive plate assembling of preparation is made into battery, by charge-discharge test, discharge first
Specific capacity is 169mAh/g, discharging efficiency 87%.
Embodiment 2
Nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method, comprises the following steps：
(1) quality proportioning is pressed, weighs LiNi respectively1/3Co1/3Mn1/3O2Active powder 0.6g, acetylene black 0.075g and
PVDF0.075g, it is placed in measuring cup, and 1-METHYLPYRROLIDONE is added into measuring cup, after adjusting viscosity, magnetic agitation 8h
To well mixed, acquisition anode sizing agent；
(2) by aluminium foil patch on a glass, anode sizing agent is formed into coated sample coated on aluminium foil；
(3) by described coated sample in vacuum freezing drying oven, vacuum freeze drying processing is carried out, is formed dry
Sample after dry；Wherein：Described vacuum freeze drying temperature is -30 DEG C, and the vacuum freeze drying time is 12h；
(4) nickle cobalt lithium manganate ternary based lithium-ion battery positive plate is made through tabletting and sectioning in dried sample；
After the nickle cobalt lithium manganate ternary based lithium-ion battery positive plate assembling of preparation is made into battery, by charge-discharge test, discharge first
Specific capacity is 162mAh/g, discharging efficiency 85%.
Embodiment 3
Nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method, comprises the following steps：
(1) quality proportioning is pressed, weighs LiNi respectively1/3Co1/3Mn1/3O2Active powder 0.5g, acetylene black 0.062g and
PVDF0.062g, it is placed in measuring cup, and 1-METHYLPYRROLIDONE is added into measuring cup, after adjusting viscosity, magnetic agitation 9h
To well mixed, acquisition anode sizing agent；
(2) by aluminium foil patch on a glass, anode sizing agent is formed into coated sample coated on aluminium foil；
(3) by described coated sample in vacuum freezing drying oven, vacuum freeze drying processing is carried out, is formed dry
Sample after dry；Wherein：Described vacuum freeze drying temperature is -40 DEG C, and the vacuum freeze drying time is 14h；
(4) nickle cobalt lithium manganate ternary based lithium-ion battery positive plate is made through tabletting and sectioning in dried sample；
After the nickle cobalt lithium manganate ternary based lithium-ion battery positive plate assembling of preparation is made into battery, by charge-discharge test, discharge first
Specific capacity is 165mAh/g, discharging efficiency 87%.
Claims (6)
1. nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method, it is characterised in that comprise the following steps：
(1) quality proportioning, nickle cobalt lithium manganate active powder are pressed：Acetylene black：PVDF=(4~6):(0.5~0.75):(0.5~
0.75) nickle cobalt lithium manganate active powder, acetylene black and PVDF, are weighed, is placed in container, and N- methylpyrroles are added into container
Alkanone, after adjusting viscosity, 8~10h of stirring to well mixed, acquisition anode sizing agent；
(2) anode sizing agent is formed into coated sample coated on aluminium foil；
(3) described coated sample is subjected to vacuum freeze drying processing, forms dried sample；Wherein：Described
Vacuum freeze drying temperature is -50~-30 DEG C, and the vacuum freeze drying time is 12~16h；
(4) nickle cobalt lithium manganate ternary based lithium-ion battery positive plate is made through tabletting and sectioning in dried sample.
2. nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method according to claim 1, it is characterised in that institute
The nickle cobalt lithium manganate molecular formula stated is LiNixCoyMnzO2, wherein：X+y+z=1, x>0, y>0, z>0.
3. nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method according to claim 1, it is characterised in that institute
In the step of stating (1), agitating mode is magnetic agitation.
4. nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method according to claim 1, it is characterised in that institute
In the step of stating (2), aluminium foil is attached on smooth surface and operated.
5. nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method according to claim 1, it is characterised in that institute
In the step of stating (3), vacuum freeze drying processing is carried out in vacuum freezing drying oven.
6. nickle cobalt lithium manganate ternary based lithium-ion battery positive plate preparation method according to claim 1, it is characterised in that institute
In the step of stating (4), after the nickle cobalt lithium manganate ternary based lithium-ion battery positive plate assembling of preparation is made into battery, pass through discharge and recharge
Test, first discharge specific capacity >=162mAh/g, discharging efficiency >=85%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258186A (en) * | 2018-01-08 | 2018-07-06 | 苏州宇量电池有限公司 | A kind of preparation method of electrodes of lithium-ion batteries |
| CN108258187A (en) * | 2018-01-08 | 2018-07-06 | 苏州宇量电池有限公司 | A kind of low temperature drying method of electrodes of lithium-ion batteries |
| CN111420853A (en) * | 2020-03-27 | 2020-07-17 | 天目湖先进储能技术研究院有限公司 | Pole piece drying method for inhibiting adhesive migration, pole piece and battery |
| CN112984963A (en) * | 2021-02-19 | 2021-06-18 | 芜湖天弋能源科技有限公司 | Lithium ion battery cell drying method capable of improving battery cell consistency |
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| CN101399329A (en) * | 2007-09-26 | 2009-04-01 | 北京化工大学 | Positive pole plate of lithium-sulfur cell and manufacturing method thereof |
| CN102263229A (en) * | 2011-06-03 | 2011-11-30 | 江西长河新电池有限公司 | Pole pieces of lithium-ion storage battery |
| CN102544578A (en) * | 2012-03-16 | 2012-07-04 | 天津力神电池股份有限公司 | Lithium ion battery capable of improving comprehensive performance |
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| CN101399329A (en) * | 2007-09-26 | 2009-04-01 | 北京化工大学 | Positive pole plate of lithium-sulfur cell and manufacturing method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108258186A (en) * | 2018-01-08 | 2018-07-06 | 苏州宇量电池有限公司 | A kind of preparation method of electrodes of lithium-ion batteries |
| CN108258187A (en) * | 2018-01-08 | 2018-07-06 | 苏州宇量电池有限公司 | A kind of low temperature drying method of electrodes of lithium-ion batteries |
| CN108258186B (en) * | 2018-01-08 | 2020-11-20 | 苏州宇量电池有限公司 | Preparation method of lithium ion battery pole piece |
| CN111420853A (en) * | 2020-03-27 | 2020-07-17 | 天目湖先进储能技术研究院有限公司 | Pole piece drying method for inhibiting adhesive migration, pole piece and battery |
| CN112984963A (en) * | 2021-02-19 | 2021-06-18 | 芜湖天弋能源科技有限公司 | Lithium ion battery cell drying method capable of improving battery cell consistency |
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Application publication date: 20180105 |