High-temperature electrolyte for ternary manganese lithium battery

An electrolyte and lithium-ion battery technology, applied in the field of lithium-ion battery electrolyte materials, can solve the problems of poor cycle performance of ternary manganese lithium batteries, serious gas production at high temperature, and large expansion rate of thickness in high-temperature storage, so as to suppress HF Effects of gas generation, corrosion prevention, and cycle life improvement

Inactive Publication Date: 2014-03-26
骆驼集团蓄电池研究院有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a high-temperature electrolyte additive for a ternary manganese-manganese lithium battery and its electrolyte, which can be used to solve the poor cycle performance of the ternary manganese-manganese lithium b

Method used

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  • High-temperature electrolyte for ternary manganese lithium battery

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Embodiment 1

[0015] 0.5% by mass of 1,4 butane sultone (1,4BS), 1% of ethanolamine, and 14% of lithium hexafluorophosphate are dissolved in 84.5% organic solvent (EC DMC EMC volume ratio is 1:1:1 ), mix well to make electrolyte.

Embodiment 2

[0017] 0.3% by mass of 1,3-propane sultone (1,3-PS), 1.2% of ethanolamine, and 13% of lithium hexafluorophosphate are dissolved in 85.5% of organic solvent (EC DMC EMC volume ratio is 1:1 :1), mix well to make electrolyte.

Embodiment 3

[0019] 1% by mass of 1,4 butane sultone (1,4BS), 1% of ethanolamine, and 12% of lithium hexafluorophosphate are dissolved in 86% organic solvent (EC DMC EMC volume ratio is 1:1:1 ), mix well to make electrolyte.

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Abstract

The invention belongs to the technical field of electrolyte materials for lithium ion batteries, and particularly relates to an electrolyte additive for a ternary manganese lithium ion battery and an electrolyte of the ternary manganese lithium ion battery. In order to overcome the defects in the prior art such as fast battery capacity fading and short service life of a lithium battery in the common electrolyte, the invention provides the electrolyte additive of the lithium battery and the electrolyte of the lithium battery. The electrolyte additive is formed by mixing 1, 4 butane sulfonic acid lactone or 1, 3-propane sulfonic acid lactone with ethanol amine, and the electrolyte containing the additive comprises 11% to 15% of lithium salt, 82% to 88% of organic solvent and 0.5% to 4% of additives. According to the invention, a high-temperature electrolyte containing the additive is used, so that ternary manganese lithium ion battery has good high-temperature storage and recycling effects, and the effect is best when the mass mixing ratio of 1, 4 butane sulfonic acid lactone or 1, 3-propane sulfonic acid lactone to ethanol amine is 1: (1-2). The electrolyte additive for the lithium ion batteries and the electrolyte thereof are suitable for being vigorously popularized in a manufacture or application field of the lithium battery.

Description

technical field [0001] The invention belongs to the technical field of electrolyte materials for lithium ion batteries, and in particular relates to an electrolyte additive for a ternary manganese lithium ion battery and an electrolyte thereof. Background technique [0002] Rechargeable battery packs containing lithium ions, also known as lithium ion secondary batteries or lithium ion battery packs, due to their large capacity, long life, and no memory effect, rechargeable battery packs containing lithium ions are Advantageous and widely used in small size applications. Lithium-containing rechargeable batteries are widely used in a variety of applications and have shown particular utility in mobile phones, mobile computers, and other electronic devices. However, the applicable temperature range of lithium-ion batteries is narrow. Generally, when the temperature is higher than 55 °C, the battery capacity decays quickly, and even combustion or explosion may occur, which serio...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0566
CPCH01M10/0567H01M2300/0025Y02E60/10
Inventor 王萍吕循峰刘勇娄勇刚张郁茹
Owner 骆驼集团蓄电池研究院有限公司
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