CN106525639A - Testing method of water absorption property of high-nickel material - Google Patents
Testing method of water absorption property of high-nickel material Download PDFInfo
- Publication number
- CN106525639A CN106525639A CN201611007416.1A CN201611007416A CN106525639A CN 106525639 A CN106525639 A CN 106525639A CN 201611007416 A CN201611007416 A CN 201611007416A CN 106525639 A CN106525639 A CN 106525639A
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- China
- Prior art keywords
- testing
- nickel material
- water absorbing
- absorbing properties
- water absorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
- G01N5/025—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content for determining moisture content
Abstract
The invention relates to a testing method of the water absorption property of a high-nickel material. The testing environment is controlled by using a constant-temperature and constant-humidity box, full contact with the air can be guaranteed through a micro sample test, and the testing accuracy can be guaranteed by the aid of a balance with the precision being 0.1 mu g. The testing method is simple, high in accuracy, high in repeatability and very applicable to comparison of the water absorption property of samples.
Description
Technical field
The present invention relates to a kind of method of testing of high-nickel material water absorbing properties.
Background technology
Lithium ion battery is used widely in fields such as portable type electronic product, power vehicles in recent years.High Ni systems layer
Shape positive electrode has the ability of superior specific discharge capacity, good cycle performance and deep discharge, is most competitiveness
One of anode material for lithium-ion batteries.At present, in the technology pioneer in power vehicle field, it is nickelic that tesla exactly adopts
Material NCA.
High-nickel material is applied to one of greatest difficulty for producing, and is that this material is easy to water suction, and material absorbs water not
Simple physical water suction, but there is chemical reaction in meeting and the water for absorbing：So as to change the initial surface performance of material.
LiNiCoAlO2 + H2O → NiO + LiOH + O2
LiOH + CO2 → Li2CO3
The chemical reaction of generation can directly change the initial surface performance of material.
Easily there is slurry jelly in amount of moisture height in process of production, causes manufacturing scrap to cause damage.Contain in pole piece
Certain moisture, after the completion of prepared by battery core, it may occur that inflatable, battery core capacity are low, cycle performance is deteriorated.This property to battery core
There can be very big impact.Assessment to the water absorbing capacity of material seems very important.
Conventional material water absorbing properties test at present：Material is placed in air, its weight is measured at set intervals, is remembered
The increase of record weight is over time.But, the amount of the method for testing and sample, with air contact area, contains in surrounding air
The fluctuation of the water yield, temperature have close impact.So, measuring result error is larger, and comparability is poor.
Background based on more than, the present invention is a kind of high accuracy, the method for testing of repeatable high Data Comparison.For
The application in battery core of high-nickel material is still significantly.
The content of the invention
It is an object of the present invention to provide a kind of method of testing of high-nickel material water absorbing properties.
The test philosophy of the present invention：In high-nickel material, residual alkali amount is high, and Ni2+Hydrophily so that this material is easily inhaled
Moisture is received, chemical reaction occurs.Destruction material surface structure, affects material property.The invention reside in, using micro powder,
In the balance of 0.1 μ g of certainty of measurement, the environment of constant temperature and humidity, measurement increase weight than change over time.
Method of testing step is as follows：
A., climatic chamber is set for target temperature and humidity, climatic chamber includes temperature and moisture sensors, also measures
The balance of 0.1 μ g of precision.
B. treat that baking oven reaches target temperature and humidity, be put into the micro detected materials kept, clock a t0。
C., run time is set, and instrument records the weight ratio of micro detected materials over time automatically.
D., after the completion of testing, data is derived, the curve of time and weight ratio is done.
In step a, 0.1 μ of certainty of measurement in control of the climatic chamber to humiture, and climatic chamber, is placed
G balances.
The advantage of this method：
1. test material is little, can be fully contacted with environment, meets 100 μm or so of coating pole piece of thickness.
2. the environment of constant temperature and humidity so that test value is more accurate is repeatable high.
Description of the drawings
Fig. 1 is the domestic and international water imbibition of a few money high-nickel material A, material B, material C under 25 DEG C of RH, 40% humiture environment
Can curve.
Specific embodiment
Climatic chamber is opened, warm and humid angle value is set.When instrument is run to setting humiture, weigh and micro wait to measure and monitor the growth of standing timber
Material is placed in 0.1 μ g balances of certainty of measurement, automatic record start time and initial weight, and according to setting interval time record weight
Value.
Data are derived, the coordinate curve of weight and time is made.
As Fig. 1 shows, in the environment of 25 DEG C of RH 40%, domestic and international a few money high-nickel material A, material B, the water absorbing properties of material C
In curve, the water absorbing properties of materials A are worst, and its manufacturing process effect is best.
Claims (4)
1. a kind of method of testing of high-nickel material water absorbing properties, it is characterised in that：In a climatic chamber, take micro to be measured
Material tests weight on balance.
2. the method for testing of high-nickel material water absorbing properties as claimed in claim 1, it is characterised in that：Climatic chamber can be accurate
The humiture of control environment.
3. the method for testing of high-nickel material water absorbing properties as claimed in claim 1, it is characterised in that：Micro detected materials powder
, in 20mg or so, distribution area is in 1cm for weight2Left and right, contact situation of the abundant simulated pole piece with air.
4. the method for testing of high-nickel material water absorbing properties as claimed in claim 1, it is characterised in that：Balance resolution accuracy exists
0.1ug and more than, and weight data can be recorded automatically with the time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611007416.1A CN106525639A (en) | 2016-11-16 | 2016-11-16 | Testing method of water absorption property of high-nickel material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611007416.1A CN106525639A (en) | 2016-11-16 | 2016-11-16 | Testing method of water absorption property of high-nickel material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106525639A true CN106525639A (en) | 2017-03-22 |
Family
ID=58353277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611007416.1A Pending CN106525639A (en) | 2016-11-16 | 2016-11-16 | Testing method of water absorption property of high-nickel material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106525639A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627612A (en) * | 2018-05-09 | 2018-10-09 | 合肥国轩高科动力能源有限公司 | It is a kind of quickly to measure ternary material humidity sensitive device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201517986U (en) * | 2009-11-10 | 2010-06-30 | 中国烟草总公司郑州烟草研究院 | Tobacco moisture percentage test glove box |
| US20130014570A1 (en) * | 2011-07-12 | 2013-01-17 | Korea Institute Of Geoscience And Mineral Resources | Automatic seepage meter |
| CN103604718A (en) * | 2013-11-15 | 2014-02-26 | 深圳市华星光电技术有限公司 | Method for measuring moisture in liquid crystal |
-
2016
- 2016-11-16 CN CN201611007416.1A patent/CN106525639A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201517986U (en) * | 2009-11-10 | 2010-06-30 | 中国烟草总公司郑州烟草研究院 | Tobacco moisture percentage test glove box |
| US20130014570A1 (en) * | 2011-07-12 | 2013-01-17 | Korea Institute Of Geoscience And Mineral Resources | Automatic seepage meter |
| CN103604718A (en) * | 2013-11-15 | 2014-02-26 | 深圳市华星光电技术有限公司 | Method for measuring moisture in liquid crystal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627612A (en) * | 2018-05-09 | 2018-10-09 | 合肥国轩高科动力能源有限公司 | It is a kind of quickly to measure ternary material humidity sensitive device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170322 |