A method for measuring inorganic salts in lithium battery electrolyte

A technology for electrolytes and inorganic salts, which is applied in the field of devices for measuring inorganic salts and additives in lithium battery electrolytes, can solve the problems that there are no literatures that disclose qualitative and quantitative testing methods for inorganic salts and trace additives, and achieve easy assembly and Realization, simple operation, and the effect of improving accuracy

Active Publication Date: 2016-01-13
TIANJIN LISHEN BATTERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is currently no document disclosing the qualitative and quantitative testing methods of inorganic salts and trace additives in the lithium-ion battery electrolyte.
Although the content of these additives is very low, the functional improvement of the electrolyte is very significant

Method used

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  • A method for measuring inorganic salts in lithium battery electrolyte
  • A method for measuring inorganic salts in lithium battery electrolyte
  • A method for measuring inorganic salts in lithium battery electrolyte

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0037] In this embodiment 1, the conventional wet digestion method is used for pretreatment of the electrolyte to be tested.

[0038] Accurately weigh 0.5g of the electrolyte sample to be tested with an electronic balance, place it in the PTFE-lined tank of a 20mL high-pressure digestion tank, add 3mL of mixed acid for digestion (hydrochloric acid: nitric acid = 1:3), and then add Appropriate amount of pure water, after tightening the lid, place in a 300°C oven and heat for 30 minutes to fully digest the electrolyte components. After the digestion, the electrolyte sample is completely transferred to a 100mL plastic volumetric flask, which is called test solution 1; pipette 5mL from test solution 1, and dilute it to a 100mL plastic volumetric flask with pure water, which is called test solution 2.

[0039] The element contents of Li, P, B, and S in the above-mentioned test liquid 1 and test liquid 2 were tested by inductively coupled plasma, and the test results are shown in Ta...

Embodiment 2

[0044] In this embodiment 2, the above figure 1 The detection device shown in the present invention performs pretreatment and qualitative and quantitative testing of the components of the electrolyte through the detection method provided by the present invention.

[0045] (1) Accurately weigh 20g of the electrolyte sample to be tested and place it in a plastic beaker 7 of known quality, then place the beaker in the test chamber, cover the top cover 2, and cover the top cover 2 and the wide-mouth container 1 with vaseline or After vacuum ester sealing. During operation, first open the two-way valve 6 of the inert gas cylinder and the switch of the vacuum pump, and adjust so that the flow rate of the gas in and out is basically equal; The method can gradually remove the volatile organic solvent in the sample. After repeated cleaning for many times, a pure and dry inorganic mixture can be obtained. After taking it out, it can be quantitatively weighed to calculate the amount of ...

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Abstract

The invention discloses a device and a method for determining inorganic salts and additives in lithium battery electrolyte. According to the determining device and the determining method, a sample is pre-treated by a physical exclusive method; organic components are removed by air blowing and vacuumizing; original inorganic salt components are kept under the protection of inert gas so that the accuracy of qualitative analysis of the inorganic components is improved, and furthermore, a testing way is provided for the detection of a complete formula of the lithium-ion battery electrolyte.

Description

technical field [0001] The invention relates to the technical field, in particular to a device and method for measuring inorganic salts and additives in lithium battery electrolyte. Background technique [0002] At present, lithium-ion batteries have been widely promoted and used as a green energy source. However, with the improvement of market requirements for energy density and power density, the requirements for lithium-ion battery materials are getting higher and higher, such as high voltage, high power, The development of high-temperature and low-temperature system batteries has become an eternal topic in the research of lithium-ion batteries. In lithium-ion batteries, the electrolyte is not only used as a medium for lithium ion transmission, but the trace additives contained in it can form an effective protective film on the positive and negative electrodes during the first charging process, thus providing a guarantee for the performance of the battery. The compositio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
Inventor 李慧芳李飞
Owner TIANJIN LISHEN BATTERY
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