Non-aqueous electrolyte and lithium ion battery containing same

A non-aqueous electrolyte and lithium-ion battery technology, applied in the field of lithium-ion batteries, can solve the problems of low-temperature performance deterioration of lithium-ion batteries, increase the interface impedance of positive and negative electrodes, and improve lithium-ion batteries, etc.

Active Publication Date: 2016-06-01
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, there is a contradiction between improving the high-temperature performance and low-temperature performance of lithium-ion batteries from the perspective of the electrolyte.
On the one hand, the high-temperature performance can be improved by adding film-forming additives to passivate the positive-negative interface, but the low-temperature performance of lithium-ion batteries is severely deteriorated due to the simultaneous increase of the positive...

Method used

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  • Non-aqueous electrolyte and lithium ion battery containing same
  • Non-aqueous electrolyte and lithium ion battery containing same
  • Non-aqueous electrolyte and lithium ion battery containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～25

[0033] Embodiment 1~25 electrolyte solution 1 # ~25 # preparation of

[0034] In Examples 1 to 25, the electrolyte solution 1 was sequentially prepared according to the following preparation method # ~25 # :

[0035] In the drying room, lithium salt is added to the mixed solution of EC, PC and DEC, then cyclic sulfate ester compound and sodium salt are added, and after mixing evenly, an electrolyte solution is prepared, wherein the mass ratio of EC, PC and DEC EC:PC:DEC=20:20:60, the molar concentration of lithium salt in the electrolyte is 1mol / L.

[0036] In the above-mentioned Examples 1-25, the specific types of cyclic sulfuric acid ester compounds and sodium salts used and the content of each material are shown in Table 1 below. Wherein, in the following Table 1, the content of cyclic sulfate esters is the weight percentage calculated based on the total weight of the electrolyte, and the content of the sodium salt is the weight percentage calculated based on the tota...

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Abstract

The invention relates to a non-aqueous electrolyte and a lithium ion battery containing the same. The electrolyte comprises a lithium salt, an organic solvent and additives, wherein the additives comprise cyclic annular sulphate compound and a sodium salt. When the electrolyte provided by the invention is applied to the lithium ion battery, the high-temperature cycling performance of the lithium ion battery is improved; and meanwhile, the rate capability and the low-temperature discharging performance of the lithium ion battery are greatly improved, and lithium separating out in the low-temperature charging process is lowered.

Description

technical field [0001] The present application relates to the technical field of lithium-ion batteries, in particular, to an electrolyte and a lithium-ion battery including the electrolyte. Background technique [0002] The high energy density, long cycle life, wide operating temperature range, and environmental protection of lithium-ion batteries have made them the main energy source for mobile electronic devices. With the widespread application of lithium-ion batteries, higher requirements are put forward for their environmental adaptability. Nowadays, electronic products sometimes need to be used under extreme conditions, such as environments with high or low temperatures. However, the performance of lithium-ion batteries will deteriorate significantly when used under extreme conditions. [0003] As an important part of lithium-ion batteries, the electrolyte has a significant impact on the high and low temperature performance of the battery. However, in general, there i...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0525H01M10/42
CPCH01M10/0525H01M10/0567H01M10/4235H01M2300/0025Y02E60/10
Inventor 张明陈培培付成华周艳唐超
Owner NINGDE AMPEREX TECH
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