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A kind of lithium dendrite self-inhibited metal lithium secondary battery electrolyte and application thereof

A metal lithium and electrolyte technology, applied in the field of metal lithium secondary batteries and metal lithium secondary battery electrolytes, can solve problems such as lithium dendrite growth, and achieve the effects of increasing safety, increasing lithium ion concentration and simple technology

Active Publication Date: 2021-05-25
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] Therefore, the object of the present invention is to provide a metal lithium secondary battery electrolyte and its application that can realize lithium dendrite self-suppression for the lithium dendrite growth problem that occurs when the existing metal lithium secondary battery is charged.

Method used

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  • A kind of lithium dendrite self-inhibited metal lithium secondary battery electrolyte and application thereof
  • A kind of lithium dendrite self-inhibited metal lithium secondary battery electrolyte and application thereof
  • A kind of lithium dendrite self-inhibited metal lithium secondary battery electrolyte and application thereof

Examples

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Embodiment 1-5

[0056]The ratio of the metal lithium secondary battery electrolyte in Example 1-5 is shown in Table 1. In these examples, the electrolytic solution is made by adding a lithium salt and an optional additive to a solvent (the first ester solvent, the second ester solvent, and ether solvent) and mixed.

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Abstract

The invention provides an electrolyte for a secondary metal lithium battery using metal lithium as the negative electrode, the electrolyte contains lithium salt and two kinds of ester solvents, the first ester solvent is selected from ethylene carbonate, propylene carbonate , vinylene carbonate and butylene carbonate, the second ester solvent is selected from ethyl methyl carbonate, dimethyl carbonate, diethyl carbonate and methyl propyl carbonate, and the first ester solvent and the The volume ratio of the second ester solvent is 1.5‑9:1. The invention provides the application of the electrolyte in metal lithium secondary batteries and the metal lithium secondary battery containing the electrolyte. The electrolytic solution of the invention can realize the self-suppression of lithium dendrites and increase the safety of the metal lithium secondary battery.

Description

Technical field[0001]The present invention belongs to the technical field of the battery, involving metal lithium secondary batteries, and more particularly to a metal lithium secondary battery electrolyte and its application that can realize lithium delegthtrial self-suppressing.Background technique[0002]Since metal lithium has extremely high theoretical capacity (3860 mAh / g), there is a minimum reduction potential (-3.04V standard hydrogen potential) such that metal lithium is the most desirable negative electrode material of lithium batteries. Since metal lithium can be greatly improved as a negative electrode to improve the energy density of the battery, it is also known as the "ultimate negative" in the field of electrochemical energy storage.[0003]Although metal lithium has superior electrochemical properties, the metal lithium negative electrode forms a lithium lactide during charging. On the one hand, the lithium branch is increased, the specific surface area of ​​the meta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0569H01M10/052
CPCH01M10/052H01M10/0569H01M2300/0037Y02E60/10
Inventor 俞海龙黄学杰
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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