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Method for producing electrochemical cell with lithium electrode and electrochemical cell

A battery cell, electrochemical technology, applied in the direction of electrode manufacturing, lithium batteries, electrochemical generators, etc., can solve the problems of theoretical potential limit of anode and cathode active materials, high risk of liquid electrolyte, etc.

Active Publication Date: 2022-06-28
BAYERISCHE MOTOREN WERKE AG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Today, liquid electrolytes can operate at cell voltages up to about 4.3–4.4 V, thus limiting the theoretical potential of anode and cathode active materials
[0005] Additionally, liquid electrolytes present a higher risk in failure situations due to their easy ignition properties

Method used

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  • Method for producing electrochemical cell with lithium electrode and electrochemical cell

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Embodiment Construction

[0035] exist figure 1 The electrochemical cell 10 of the solid state battery shown in includes a negative electrode 12 , a positive electrode 14 , and a lithium ion-conducting solid electrolyte 16 disposed between the negative electrode 12 and the positive electrode 14 . The negative electrode 12 and the positive electrode 14 are disposed on mutually opposite surfaces 18 , 20 of the solid electrolyte 16 .

[0036] The solid electrolyte preferably consists of an oxidized or sulfided lithium ion conductor. As the active material for the positive electrode 14, a semimetal oxide such as Li(Ni) is preferably used 1 / 3 Co 1 / 3 Mn 1 / 3 )O 2 or conversion materials such as FeF 3 . The electrical conductors 22 arranged on the positive electrode 14 preferably consist of aluminum.

[0037] The negative electrode 12 includes a layer 24 of metallic lithium directly adjacent to the solid electrolyte 16 . It is preferable to use high-purity metal lithium with a purity in the range of 99...

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Abstract

The invention relates to an electrochemical cell (10) for a solid-state battery and a method for its manufacture, the electrochemical cell having a negative electrode (12), a positive electrode (14) and a solid electrolyte (16), the solid electrolyte Arranged between a negative electrode and a positive electrode and conducting lithium ions, the negative electrode comprises a layer (24) of metallic lithium and a layer (26) of lithium-metal alloy, the layer of metallic lithium directly adjoining the solid electrolyte and has a thickness of 10 nm to 1 μm. To produce electrochemical cells, the layer of metallic lithium is heated until it softens and melts only over a part of the layer thickness before it is combined with the solid electrolyte. The electrochemical cell according to the invention comprises a negative electrode comprising a layer of metallic lithium which directly adjoins the solid electrolyte, and the negative electrode comprises a layer of metallic lithium consisting of a lithium-metal alloy layer, wherein the layer consisting of metallic lithium melts only over a part of the layer thickness.

Description

technical field [0001] The invention relates to a method for producing an electrochemical cell with metallic lithium electrodes and an electrochemical cell produced according to the method, which is used in particular in solid-state batteries. Background technique [0002] Lithium-ion batteries are already used in many mobile devices. Furthermore, these batteries can also be used in hybrid and electric vehicles and for storing electricity from wind or solar installations. These batteries can be used as primary batteries for one-time use, or can be constructed as reusable secondary batteries (storage batteries). [0003] Typically a lithium-ion battery consists of one or more electrochemical cells with a negative graphite electrode (an anode during discharge) with an electrical conductor consisting of copper, so The electrochemical cell has a positive electrode (cathode during discharge) composed of a half-metal oxide layer with an electrical conductor such as aluminum, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/134H01M4/1395H01M10/052H01M10/0562H01M4/36H01M4/38H01M4/40
CPCH01M4/0407H01M4/0435H01M4/0471H01M4/0483H01M4/134H01M4/1395H01M4/366H01M4/382H01M4/405H01M10/052H01M10/0562H01M2200/10H01M2200/20Y02E60/10Y02P70/50H01M10/0525H01M10/0585H01M2004/027
Inventor D·安德烈S·施奈德S·尼恩贝格尔J-O·罗特D·许内曼B·什蒂亚斯尼C·施廷纳N·齐乌瓦拉斯T·韦尔勒T·蔡林格S·楚格曼
Owner BAYERISCHE MOTOREN WERKE AG
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