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Electrolyte additive and lithium ion battery containing electrolyte additive
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An electrolyte additive, lithium-ion battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as short cycle life, and achieve the effect of improving cycle life
Inactive Publication Date: 2012-01-18
XIAMEN HUARONG ENERGY TECH
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Abstract
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Problems solved by technology
[0003] As the most potential green energy storage device in the future, lithium-ion batteries have the advantages of high specific capacity, good safety, and small self-discharge, but their cycle life is short (only 500 to 3,000 times), especially in high and low temperature conditions. , its cycle life is shorter
These lead to certain limitations in the practical application of lithium-ion batteries, so improving the cycle life and high and low temperature performance of lithium-ion batteries has become the focus of research
Method used
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Embodiment 1
[0013] In the glove box (H 2 06 , a total of 200g.
[0014] Each take 100g and divide into two fluoride bottles, wherein,
[0015] Sample A: use the electrolyte as the electrolyte of the lithium-ion battery, and assemble it into a button-type lithium iron phosphate battery;
[0016] Sample B: based on the weight of the electrolyte, after adding 0.2% quinoline, the electrolyte was used as the electrolyte of the lithium-ion battery, and assembled into a button-type lithium iron phosphate battery.
[0017] The assembled button battery was taken out of the glove box, and the cycle performance of the two batteries was tested at room temperature (25°C). It was found that the cycle life of sample A was 2000 times at room temperature, and the cycle life of sample B was 3000 times.
Embodiment 2
[0019] In the glove box (H 2 O6 , a total of 200g.
[0020] Each take 100g and divide into two fluoride bottles, wherein,
[0021] Sample C: use the electrolyte as the electrolyte of the lithium-ion battery, and assemble it into a button-type lithium manganate battery.
[0022] Sample D: based on the weight of the electrolyte, after adding 0.2% quinoline, the electrolyte was used as the electrolyte of the lithium-ion battery, and assembled into a button-type lithium manganate battery.
[0023] The assembled button battery was taken out of the glove box, and the cycle performance of the two batteries was tested at room temperature (25°C). It was found that the cycle life of sample C was 1500 times at room temperature, and the cycle life of sample D was 2500 times.
Embodiment 3
[0025] In the glove box (H 2 O6 , a total of 200g.
[0026] Each take 100g and divide into two fluoride bottles, wherein,
[0027] Sample E: Use the electrolyte as the electrolyte of the lithium-ion battery, and assemble it into a button-type lithium iron phosphate battery.
[0028] Sample F: based on the weight of the electrolyte, after adding 0.5% isoquinoline, the electrolyte was used as the electrolyte of the lithium-ion battery, and assembled into a button-type lithium iron phosphate battery.
[0029] The assembled button battery was taken out of the glove box, and the cycle performance of the two batteries was tested at room temperature (25°C). It was found that the cycle life of sample E was 2500 times at room temperature, and the cycle life of sample F was 4000 times.
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Abstract
The present invention discloses an electrolyte additive and a lithiumion battery containing the electrolyte additive. The electrolyte additive comprises one selected from quinoline, isoquinoline, a quinoline derivative or an isoquinoline derivative. The electrolyte additive has a structure represented by the following, wherein R1 and R2 comprise, hydrogen, methyl, ethyl, propyl, butyl, phenyl or benzyl. According to the present invention, the electrolyte additive is added to the lithiumionbattery electrolyte, the adding amount of the electrolyte additive is 0.1-2% of the weight of the electrolyte. With the electrolyte additive provided by the present invention, the cycle service life, the high temperature performance and the low temperature performance of the lithiumion battery can be improved.
Description
technical field [0001] The invention relates to an additive for lithium ion battery electrolyte which can improve the cycle life and high and low temperature performance of the lithium ion battery, and the application of the additive in the lithium ion battery. Background technique [0002] When mankind enters the 21st century, with the rapid development of the economy, the demand for energy is also increasing. In order to promote sustainable development, lithium-ion batteries, as a new energy device, have attracted more and more people's attention and have become a high-tech One of the technical priorities, significant progress has been made in recent years. As global energy and environmental problems become more and more serious, vehicles have switched to energy storage batteries as the main power source. Lithium-ion batteries are considered to be the ideal choice for high-capacity and high-power batteries, and will gradually replace nickel-hydrogen batteries. . [0003]...
Claims
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Application Information
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