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A kind of battery electrolyte containing ammonium iodide additive and preparation method thereof

An electrolyte and additive technology, which is applied in the field of battery electrolytes containing ammonium iodide additives and their preparation, can solve the problems of increasing the electrolyte preparation process and cost, and achieve the effects of improving long-cycle performance, reducing side reactions, and reducing deposition thickness.

Active Publication Date: 2022-05-31
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are many reports on electrolyte additives, and each additive has its own characteristics and mechanism of action, but the use of multiple additives will increase the preparation process and cost of the electrolyte

Method used

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  • A kind of battery electrolyte containing ammonium iodide additive and preparation method thereof
  • A kind of battery electrolyte containing ammonium iodide additive and preparation method thereof
  • A kind of battery electrolyte containing ammonium iodide additive and preparation method thereof

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Abstract

The invention discloses a battery electrolyte containing ammonium iodide additive and a preparation method thereof, belonging to the technical field of battery materials. The electrolyte provided by the invention includes an organic solvent, a lithium salt and an additive, and the additive includes ammonium iodide. Anion I of the ammonium iodide additive of the present invention ‑ A solid electrolyte interface film containing LiI can be formed on the surface of lithium metal, and the amine-based cation and Li 2 There are hydrogen bonds between S, which can reduce Li 2 The energy barrier of S conversion improves the utilization rate of active material sulfur. The anion and cation of the additive used in the present invention can act on both anions and cations, and have different action angles, which can greatly improve the efficiency of the electrolyte and reduce the usage amount of the electrolyte.

Description

A kind of battery electrolyte containing ammonium iodide additive and preparation method thereof technical field The present invention relates to the technical field of battery materials, in particular to a kind of battery electrolysis containing ammonium iodide additive quality and method of preparation. Background technique Due to the advantages of high energy density, low price, and environmental friendliness, lithium-sulfur batteries have become a high-energy density lithium metal battery. Pool research hotspots. Sulfur has a theoretical specific capacity as high as 1675mAh / g, matching with lithium metal anode, the theory of lithium sulfur battery The energy density can reach 2600Wh / kg, which has a good application prospect. However, there are still many deficiencies in lithium-sulfur batteries, including Including low Coulombic efficiency, fast capacity fading, and serious self-discharge, many of these problems are related to the use of metallic lithium anodes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567H01M10/058H01M10/052H01M10/42
CPCH01M10/0567H01M10/058H01M10/052H01M10/4235Y02P70/50Y02E60/10
Inventor 陈人杰徐赛男赵腾赵圆圆叶玉胜吴锋
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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