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Electrochemical cell and method for producing an electrochemical zell

An electrochemical and battery technology, applied in the field of electrochemical batteries, can solve problems such as unstable electrolyte lithium, uneven deposition and dissolution of lithium, short circuit of battery packs, etc., and achieve the effect of improving cycle stability and improving conductivity

Active Publication Date: 2016-08-31
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of lithium metal anodes is accompanied by serious problems
Big challenge is uneven deposition and dissolution of lithium
This leads to the formation of dendrites (petrified needle-like crystals), which, when invading the separator and the contact with the cathode, can lead to short circuits in the battery pack
Furthermore, the electrolyte used is unstable with respect to lithium

Method used

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  • Electrochemical cell and method for producing an electrochemical zell
  • Electrochemical cell and method for producing an electrochemical zell
  • Electrochemical cell and method for producing an electrochemical zell

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Experimental program
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Embodiment Construction

[0040] Figure 1a A cross-sectional view of the protective layer of the electrochemical cell according to the present invention according to an embodiment of the present invention is shown.

[0041] (in Figure 1a The protective layer 14 of the electrochemical cell (not shown in) has a first substance 14a and a second substance 14b according to the present embodiment. The first substance 14a is constructed by a material conducting lithium ions and the second substance 14b is constructed by a polymer. The lithium ion conductive material 14a has a lattice structure with multiple AND (in Figure 1a Not shown in) the negative electrode is arranged substantially perpendicular to the component 17 and and (in Figure 1a (Not shown in)) a component 18 in which the negative electrodes are arranged substantially in parallel. The gap constructed in the lithium ion conductive material 14a is filled with the polymer 14b.

[0042] Figure 1b A cross-sectional view of the protective layer of the...

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Abstract

The invention relates to an electrochemical cell, comprising a negative electrode, a positive electrode, a protective layer which is arranged on the negative electrode and isolates the negative electrode from the positive electrode, and an electrolyte, wherein the negative electrode at least partially comprises metallic lithium, and wherein the protective layer arranged on the negative electrode is formed from a composite material comprising at least a first material and a second material. The invention furthermore relates to a corresponding method for producing an electrochemical cell.

Description

Technical field [0001] The invention relates to an electrochemical cell and a method for manufacturing an electrochemical cell. Background technique [0002] Electrochemical batteries, especially lithium-based secondary battery packs, are used as energy storage devices in mobile information devices, such as mobile phones, tools or electric vehicles, and vehicles with hybrid drives due to their high energy density and high capacity in. Despite these very different application areas of electrochemical batteries, all batteries used must similarly meet high requirements: the highest possible specific capacity and specific energy density with the smallest possible weight, which are in large quantities Stable maintenance on charge and discharge cycles. [0003] The particularly high specific energy density of lithium-based batteries can be achieved by using lithium metal anodes. However, the use of lithium metal anodes is accompanied by serious problems. The big challenge is the unev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M2/16H01M2/18H01M4/38H01M10/052H01M10/056H01M50/403H01M50/463
CPCH01M4/382H01M10/052H01M10/056H01M2300/0068H01M2300/0082H01M2300/0088Y02E60/10H01M50/403H01M50/446H01M50/463Y02P70/50Y02T10/70H01M4/622H01M4/628H01M10/0525H01M10/058
Inventor U.绍特M.维格纳J.蒂伦B.施蒂亚什尼
Owner ROBERT BOSCH GMBH