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Ternary cathode material lithium ion battery and electrolyte thereof

A technology of lithium-ion batteries and cathode materials, applied in the field of ternary cathode materials, high-voltage lithium-ion batteries and their electrolytes, can solve problems such as insufficient high-temperature storage performance, poor cycle performance, and inability to meet the use of power vehicles in a wide temperature range. Achieve the effects of improving high-temperature storage performance, low-temperature discharge platform, and excellent cycle performance

Active Publication Date: 2016-05-18
DONGGUAN SHANSHAN BATTERY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings of the current ternary positive electrode material power battery, such as poor cycle performance under high voltage, insufficient high-temperature storage performance, low low-temperature discharge platform, large change in internal resistance during use, and inability to meet the use of power vehicles in a wide temperature range, the invention’s One of the purposes is to provide an electrolyte that can work normally at a voltage of 4.4V and above, which can meet the needs of ternary cathode material system batteries

Method used

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  • Ternary cathode material lithium ion battery and electrolyte thereof
  • Ternary cathode material lithium ion battery and electrolyte thereof
  • Ternary cathode material lithium ion battery and electrolyte thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Electrolyte preparation:

[0029]In a glove box filled with argon (moisture 6 , and stirred until it was completely dissolved to obtain the lithium-ion battery electrolyte of Example 1.

[0030] Preparation of lithium-ion batteries:

[0031] The positive electrode active material LiNi 0.5 co 0.2 mn 0.3 o 2 (LNCM), conductive agent acetylene black, and binder polyvinylidene fluoride (PVDF) were mixed in N-methylpyrrolidone solvent system at a mass ratio of 95:3:2, and then coated on Al foil and baked. Dry and cold press to obtain the positive electrode sheet with a compacted density of 3.55g / cm 3 .

[0032] Negative electrode active material graphite, conductive agent acetylene black, binder styrene-butadiene rubber (SBR), thickener carbon methyl cellulose sodium (CMC) are in the deionized water solvent system according to the mass ratio of 96:2:1:1 After fully stirring and mixing evenly, it is coated on Cu foil, dried, and cold-pressed to obtain a negative electr...

Embodiment 2

[0036] Different from Example 1 is the preparation of electrolyte:

[0037] In a glove box filled with argon (moisture 6 , and stirred until it was completely dissolved to obtain the lithium-ion battery electrolyte of Example 2.

[0038] The rest are the same as in Embodiment 1, and will not be repeated here.

Embodiment 3

[0040] Different from Example 1 is the preparation of electrolyte:

[0041] In a glove box filled with argon (moisture 6 , and stirred until it was completely dissolved to obtain the lithium-ion battery electrolyte of Example 3.

[0042] The rest are the same as in Embodiment 1, and will not be repeated here.

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Abstract

The invention relates to the technical field of lithium ion batteries, in particular to a ternary cathode material lithium ion battery and an electrolyte thereof. The electrolyte comprises a non-water-based organic solvent, lithium salt and an additive. The additive comprises 1,3-propane sultone, a compound with the structural formula I or II, and a compound containing an M-O-Si functional group. M is any one of B, C, N, P, S and Al. Compared with the prior art, the ternary cathode material lithium ion battery with the electrolyte can normally work within the range of high voltage of 4.4 V or above, rise of internal resistance of the battery is restrained when the battery is used in high-pressure and low-temperature environments, the high-temperature storage performance and a low-temperature discharging platform of the battery are effectively improved, and excellent circulation performance and storage performance can be achieved within the wide temperature range.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a ternary positive electrode material high-voltage lithium ion battery and an electrolyte thereof. Background technique [0002] In recent years, as our country and the international community have paid great attention to energy and environmental issues, as well as the implementation of the national sustainable development strategy and the urgent demand for new energy, the development and utilization of clean, low-carbon, pollution-free and renewable energy has become an important issue. important strategic goals of the country. Policies to actively promote energy conservation and emission reduction have been gradually implemented, and new energy vehicles have developed in an all-round way with relatively loose policies and strong government support. At present, the country is vigorously developing pure electric vehicles (Electronic vehicle, EV) and hybrid electric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567H01M2220/20H01M2300/0042Y02E60/10
Inventor 朱学全周文超姜彬夏兰余林颇陈政
Owner DONGGUAN SHANSHAN BATTERY MATERIALS
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