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A kind of storage method of vinyl ethylene carbonate
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A vinyl ethylene carbonate and storage method technology, applied in the storage field of vinyl ethylene carbonate, can solve the problems of turbidity change, inability to use, deterioration and the like, achieve smaller turbidity change, prolong storage time, delay metamorphic effect
Active Publication Date: 2022-04-01
SUZHOU HUAYI NEW ENERGY TECH CO LTD
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However, it is prone to deterioration under conditions such as light, high temperature, or high moisture, and exposure to air, so it cannot be used. Therefore, it is generally stored at low temperature and protected from light to prevent it from deterioration, but even so, VEC in There will still be turbidity changes after storage at room temperature for about 1 month
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Embodiment 1
[0023] When the relative humidity is less than 20%, under the protection of nitrogen, press VEC200KG into a 200L stainless steel barrel (SUS304, with female teeth), open the female teeth, press 2gBHT, 1gTMP, and then use nitrogen to stir the materials in the stainless steel barrel for 1 hour, so that BHT, TMP is completely dissolved in VEC. After the stirring is completed, nitrogen gas of 0.08 MPa is injected into the barrel. Then it was divided into six 1-liter stainless steel barrels under the protection of nitrogen and stored with V1-1, V1-2, V-3, V1-4, V1-5, and V 1-6.
Embodiment 2
[0025] At a relative humidity of less than 20%, under the protection of nitrogen, press VEC200KG into a 200L stainless steel barrel (SUS304, with female teeth), open the female teeth by venting, press in 5gBHT and stir the materials in the stainless steel barrel with nitrogen for 1 hour, so that the BHT is completely dissolved in VEC. After the stirring is completed, nitrogen gas of 0.08 MPa is injected into the barrel. Then it was divided into six 1-liter stainless steel barrels under the protection of nitrogen and stored with V2-1, V2-2, V2-3, V2-4, V2-5, V2-6.
Embodiment 3
[0027] When the relative humidity is less than 20%, under the protection of nitrogen, press VEC200KG into a 200L stainless steel barrel (SUS304, with female teeth), open the female teeth, press HQ3g, BHT3g, and stir the materials in the stainless steel barrel with nitrogen for 1 hour, so that HQ, BHT is completely dissolved in VEC. After the stirring is completed, nitrogen gas of 0.06 MPa is injected into the barrel. Then it was divided into six 1-liter stainless steel barrels under the protection of nitrogen and stored with V3-1, V3-2, V3-3, V3-4, V3-5, V3-6.
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Abstract
The invention discloses a storage method of vinyl ethylene carbonate. The storage method comprises the following steps: under the protection of protective gas, vinyl ethylene carbonate is mixed with The mixture of the stabilizing agent of ester reaction is protected from light and sealed; wherein, the stabilizing agent is a combination of one or more selected from molecular type polymerization inhibitors and free radical type polymerization inhibitors; the method of the present invention can obviously delay vinyl ethylene carbonate The deterioration of the ester, the turbidity change is significantly smaller, and the storage time is significantly prolonged, and the addition of stabilizers will not affect the use of vinyl ethylene carbonate, especially as an organic film-forming additive for lithium-ion secondary batteries. Applications.
Description
technical field [0001] The invention belongs to the technical field of organic film-forming additives for electrolytes of lithium-ion secondary batteries, in particular to vinyl ethylene carbonate, and in particular to a storage method for vinyl ethylene carbonate. Background technique [0002] Adding a small amount of unsaturated carbonate in the non-aqueous electrolyte can significantly improve the electrochemical performance. For example, vinylene carbonate (VC) has been widely used as an additive since it can form a stable phase interface (SEI) layer on the anode surface. Nevertheless, vinylene carbonate (VC) is not stable enough, which restricts its application. [0003] In recent years, VEC (vinyl ethylene carbonate, Vinyl ethylene carbonate, organic film-forming additive for lithium-ion secondary battery electrolyte) has attracted much attention. The reason is that VEC has a more stable structure than VC; considering that VEC has multiple electrons At the same time,...
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