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Electrolyte and lithium ion battery

A lithium-ion battery and electrolyte technology, applied in secondary batteries, organic electrolytes, non-aqueous electrolytes, etc., can solve problems such as inability to effectively release lithium supplementary capacity and high decomposition potential of lithium-containing compounds

Active Publication Date: 2021-02-23
SONGSHAN LAKE MATERIALS LAB +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the added lithium-containing compound has a high decomposition potential and cannot effectively release the lithium supplementary capacity.

Method used

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  • Electrolyte and lithium ion battery
  • Electrolyte and lithium ion battery
  • Electrolyte and lithium ion battery

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Embodiment Construction

[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below. Those who do not indicate the specific conditions in the examples are carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used were not indicated by the manufacturer, and they were all conventional products that could be purchased from the market.

[0016] It should be noted that "and / or" in this application, such as "feature 1 and / or feature 2", all refer to "feature 1", "feature 2" or "feature 1" alone Add "Feature 2", the three cases.

[0017] In the description of the present application, "multiple" in "one or more" all means "two" or "more than two".

[0018] In addition, in the description of the present application, unless otherwise specified, the mea...

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Abstract

The invention provides an electrolyte and a lithium ion battery, and belongs to the technical field of batteries. The electrolyte comprises an organic solvent and a lithium salt dissolved in the organic solvent, and also comprises an auxiliary agent. The auxiliary agent is selected from one or more of S elementary substance, B elementary substance, P elementary substance and a reducing compound capable of releasing specific negative ions in the electrolyte, and the specific negative ions are selected from one or more of S negative ions, B negative ions and P negative ions. The lithium ion battery comprises the electrolyte. The specific type of auxiliary agent can effectively reduce the potential when a lithium-containing compound is decomposed; and by adding the auxiliary agent into the electrolyte, the battery is ensured to have better cycling stability, and meanwhile, the applicability in a battery production process is good.

Description

technical field [0001] The present application relates to the technical field of batteries, in particular, to an electrolyte solution and a lithium-ion battery. Background technique [0002] During the first charging process of a lithium-ion battery, the formation of a solid electrolyte film (SEI) on the surface of the negative electrode will consume a large amount of active lithium, resulting in irreversible lithium loss, resulting in a reduction in recyclable lithium, reducing the first coulombic efficiency and battery capacity of the battery , which reduces the energy density of the battery. [0003] At present, lithium-containing compounds are usually added to replace the active material of the positive electrode on the side of the positive electrode of the battery to make up for the loss of lithium ions caused by the formation of the SEI film on the surface of the negative electrode. However, the added lithium-containing compound has a high decomposition potential and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0567H01M10/0525H01M2300/0025Y02E60/10
Inventor 田孟羽黄学杰闫勇李文超石磊
Owner SONGSHAN LAKE MATERIALS LAB
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