Non-aqueous electrolyte and lithium ion battery using the same

A non-aqueous electrolyte and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of poor high temperature performance of batteries, and achieve the effect of improving low temperature cycle performance and rate performance

Active Publication Date: 2015-02-04
DONGGUAN AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-temperature performance of the battery usually deteriorates...

Method used

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  • Non-aqueous electrolyte and lithium ion battery using the same
  • Non-aqueous electrolyte and lithium ion battery using the same
  • Non-aqueous electrolyte and lithium ion battery using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Electrolyte preparation: In an argon atmosphere glove box with a water content 6 Dissolved in the above non-aqueous solvents to form LiPF 6 Basic electrolyte with a concentration of 1mol / L. Then, add LiBF to the base electrolyte 4 and triphenylphosphonic acid cyclic anhydride, the mass fractions of the two in the electrolyte are 0.2% and 1%, respectively.

[0083] The preparation of the lithium-ion battery is the same as in Comparative Example 1, and will not be repeated here.

Embodiment 2

[0085] Electrolyte preparation: In an argon atmosphere glove box with a water content 6Dissolved in the above non-aqueous solvents to form LiPF 6 Basic electrolyte with a concentration of 1mol / L. Then, add LiBF to the base electrolyte 4 and tripropylphosphonic acid cyclic anhydride, the mass fractions of the two in the electrolyte are 0.2% and 1%, respectively.

[0086] The preparation of the lithium-ion battery is the same as in Comparative Example 1, and will not be repeated here.

Embodiment 3

[0088] Electrolyte preparation: In an argon atmosphere glove box with a water content 6 Dissolved in the above non-aqueous solvents to form LiPF 6 Basic electrolyte with a concentration of 1mol / L. Then, add LiBF to the base electrolyte 4 and triethylphosphonic acid cyclic anhydride, the mass fractions of the two in the electrolyte are 0.2% and 1%, respectively.

[0089] The preparation of the lithium-ion battery is the same as in Comparative Example 1, and will not be repeated here.

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Abstract

The invention relates to a non-aqueous electrolyte and a lithium ion battery using the same. The non-aqueous electrolyte comprises a non-aqueous organic solvent, lithium salts, and an additive, and is characterized in that the additive comprises phosphonic acid cyclic anhydride compounds and lithium tetrafluoroborate, the mass percentage of phosphonic acid cyclic anhydride compounds in electrolyte is 0.05% to 3%, and the mass percentage of lithium tetrafluoroborate in electrolyte is 0.01% to 2%. Compared to the prior art, the lithium ion battery using the electrolyte has the characteristics of excellent low temperature cycle performance and high-rate discharge performance.

Description

technical field [0001] The application belongs to the field of batteries, and in particular relates to a non-aqueous electrolyte and a lithium ion battery using the electrolyte. Background technique [0002] Lithium-ion batteries have significant advantages such as high specific energy, high specific power, long cycle life, and small self-discharge. They have been widely used in electronic products such as mobile communications, digital cameras, and video cameras, and have become a hot spot in the development of energy storage and power batteries. . With the wide application of lithium-ion batteries, higher requirements are put forward for their environmental adaptability, and lithium-ion batteries have been used in various environments. For example, in severe cold areas with harsh environments, lithium-ion batteries are required to work normally at extremely low temperatures. However, the charge and discharge performance of lithium-ion batteries in low temperature environ...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567Y02E60/10
Inventor 李素丽付成华王可飞唐超林永寿
Owner DONGGUAN AMPEREX TECH
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