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Lithium titanate battery and lithium titanate battery electrolyte

A lithium titanate battery and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problem of unsatisfactory cycle performance and storage performance of lithium titanate anode materials, affect the cycle life of lithium ion batteries, and cannot inhibit titanium dioxide. Lithium oxide catalytic activity and other problems, to achieve the effect of improving high temperature storage and high temperature cycle performance, realizing gas production and reducing catalytic effect

Active Publication Date: 2013-09-25
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the cycle performance and storage performance of lithium titanate anode materials at high temperatures are not satisfactory, and more gas will be generated, which affects the cycle life of lithium-ion batteries
[0004] Among the current electrolyte additives, such as VC and PS, they cannot effectively form a film on the surface of lithium titanate, nor can they inhibit the catalytic activity of lithium titanate.
In previous experiments, it was found that linear phosphate can passivate lithium titanate to a certain extent, and can inhibit its gas production, but because of its linear structure, it cannot effectively form a film on the surface of lithium titanate, so the degree of inhibition limited

Method used

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  • Lithium titanate battery and lithium titanate battery electrolyte

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Embodiment 1

[0028] Embodiment 1 of the present invention provides an electrolyte solution for a lithium titanate battery, which includes a solvent, a solute, and an additive, wherein the additive is VC accounting for 1% of the electrolyte solution and VC accounting for 0.5% of the electrolyte solution and having the following structural formula Cyclic Phosphates:

[0029]

Embodiment 2

[0031] Embodiment 2 of the present invention provides an electrolyte solution for a lithium titanate battery, which includes a solvent, a solute and an additive, wherein the additive is 0.5% of the mass of the electrolyte VC and 0.01% of the mass of the electrolyte and has the following structural formula Cyclic Phosphates:

[0032]

Embodiment 3

[0034] Embodiment 3 of the present invention provides an electrolyte solution for a lithium titanate battery, which includes a solvent, a solute and an additive, wherein the additive is a cyclic phosphate ester accounting for 0.1% by mass of the electrolyte solution and having the following structural formula:

[0035]

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PUM

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Abstract

The invention discloses electrolyte for a lithium titanate battery. The electrolyte comprises a solvent, a solute and an additive, wherein the additive contains cyclic phosphate with the structural formula (1), (2), (3) or (4), R represents for a hydrocarbyl group of C1 to C6, a ketone group of C2 to C6, an ether group of C2 to C6 or a halogen element, and R' represents for a saturated hydrocarbyl group of the C2 to te C6 or unsaturated hydrocarbyl group of the C2 to the C6. In addition, the invention also discloses a lithium titanate battery.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries. More specifically, the invention relates to a lithium titanate battery with good high-temperature storage performance and its electrolyte. Background technique [0002] Lithium titanate battery refers to a battery that uses lithium titanate as the anode active material. Lithium titanate is a zero-strain lithium battery anode material with good cycle performance and service life. Therefore, in lithium-ion batteries It has a good application prospect. Studies have shown that lithium-ion batteries using lithium titanate as an anode material have a cycle life of more than 20,000 times at room temperature. In addition, the battery using lithium titanate as the anode material also has the advantages of stable discharge voltage, superior rate performance, high voltage platform, and no lithium precipitation, so it has high safety and has great potential in electric vehicles. Application a...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0525
CPCY02E60/10
Inventor 闫传苗钟开富王宝君
Owner NINGDE AMPEREX TECH
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