Silicon composition materials for use as battery anodes

A silicon composite material and battery technology, applied in the direction of battery electrodes, positive electrodes, negative electrodes, etc., can solve problems such as anode silicon detachment, achieve the effects of reducing capacity decay, increasing storage capacity, and promoting industrial production levels

Pending Publication Date: 2022-03-29
LEYDENJAR TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of these anodes is that these anodes are susceptible to silicon detachment from the anode surface

Method used

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  • Silicon composition materials for use as battery anodes
  • Silicon composition materials for use as battery anodes
  • Silicon composition materials for use as battery anodes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Copper foils giving good adhesion were prepared with an electrodeposition process which also included electrochemical deposition of a thin ZnO layer ( Figure 10 foil in 1). Next to it is also prepared by electrodeposition with deposited Cr 2 o 3 Coated copper foil ( Figure 10 Foil 2) in , and prepared by sputtering in thin Cr deposited by electrodeposition 2 o 3 Copper foil with Al-doped ZnO coating deposited on top of the layer ( Figure 10 Foil in 3). The elemental composition of the copper foil surface was measured using X-ray photoelectron spectroscopy. The results of the measurements given in Table 1 show that the surface of the copper foil is covered with a layer of metal oxides, namely ZnO, Cr 2 o 3 Or Al-doped ZnO.

[0088] Table 1. Elemental composition of the surface of the as-prepared anode measured by X-ray photoelectron spectroscopy.

[0089] element Cu Al Zn Cr C O P S Cl N peak 2p 2s 2p 2p 1s 1s 2s 2p 2p 1s...

Embodiment 2

[0093] The cycle stability of electrodes produced with copper foils comprising a zinc oxide adhesive layer was compared with copper foils comprising a coating made of chromate and foils without an adhesive layer. All foils are 8-10 microns thick. Lithium metal was used as the counter electrode, which in this example enabled the silicon-containing copper foil to act as the cathode rather than the anode. Since these experiments were used for comparative tests and stability tests, the results can be extrapolated to electrode layers comprising silicon as anodes.

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Abstract

The present invention relates to a silicon composite for use as an anode of a rechargeable battery, the silicon composite comprising (i) an electrically conductive substrate comprising a copper foil or a titanium foil; (ii) an adhesive layer attached to a foil comprising at least one or more metals and / or metal compounds; and (iii) an electrode layer comprising silicon, the electrode layer being attached to the adhesive layer.

Description

[0001] field of invention [0002] The present invention relates to silicon (Si) composites comprising copper (Cu) or titanium (Ti) foils, which can be used as anodes in batteries. The invention also relates to a process for producing a silicon composite material comprising copper or titanium foil. Such anode materials are very useful in batteries because they have a much higher specific capacity than currently used anode materials. [0003] Background of the invention [0004] Energy storage devices, including batteries and capacitors, are used in a variety of applications. Due to their relatively high energy density, relatively high specific energy, light weight and potentially long life, advanced rechargeable batteries are ideal for a wide range of consumer electronics, electric vehicles, grid storage and other Important (future) applications are desirable. However, despite the increasing commercial penetration of lithium (Li)-ion batteries, there is still a need for furt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/134H01M4/1395H01M4/36H01M10/0525
CPCH01M4/134H01M4/1395H01M4/366H01M10/0525H01M2004/028H01M4/386Y02E60/10H01M2004/027H01M4/0404H01M4/0428H01M4/661H01M4/667H01M2004/021
Inventor 阿里扬·彼得·迪登
Owner LEYDENJAR TECH BV
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