Spume lithium cathode of lithium metal secondary batteries and method for producing the same
A secondary battery and metal lithium technology, which is applied in the direction of electrode manufacturing, active material electrodes, electrode carriers/collectors, etc., can solve problems such as low safety and poor cycle performance, and achieve improved safety performance, improved cycle life, and small size Effect
Inactive Publication Date: 2008-04-16
严格集团股份有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to provide a negative electrode of a lithium metal secondary battery and a preparation method thereof in order to solve the problems of poor cycle performance and low safety of the metal lithium secondary battery currently using lithium foil as the negative electrode
Method used
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specific Embodiment approach 1
[0011] Embodiment 1: In this embodiment, the foamed lithium negative electrode of the metal lithium secondary battery is composed of a foamed metal substrate and a lithium deposition layer deposited on the surface of the foamed metal substrate.
specific Embodiment approach 2
[0012] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the metal foam substrate is a copper foam substrate. Others are the same as in the first embodiment.
[0013] The copper foam matrix has good electrical and thermal conductivity.
specific Embodiment approach 3
[0014] Embodiment 3: This embodiment is different from Embodiment 1 in that the metal foam substrate is a continuous strip-shaped copper foam substrate or a sheet-shaped copper foam substrate. Others are the same as in the first embodiment.
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Abstract
A foam lithium cathode of a lithium metal secondary battery and a method for preparing the same relate to a lithium metal secondary battery cathode and a method for preparing the same. The present invention solves the problems that the prior lithium metal secondary battery cathode material with lithium foil metal as the main material has poor cyclicity and safety. The foam lithium cathode consists of a foam metal substrate and a lithium deposit layer deposited on the surface of the foam metal substrate. The preparation method comprises the following procedures: the surface of the foam metal substrate is treated and then lithium is electrodeposited or plated lithium is vaporized. With the foam lithium material as the cathode of the lithium metal secondary battery, the real area of the cathode is large and the real current density of charge and discharge is small; no dendritic crystal and no dead lithium are produced easily; in a three-dimensional foam structure, the dendritic crystal grows in the inner side of the foam, thereby reducing the occurrence of short circuit and improving the safety and the cyclicity of the lithium metal secondary battery.
Description
technical field [0001] The invention relates to a negative electrode of a metal lithium secondary battery and a preparation method thereof. Background technique [0002] In recent years, with the development of electronic appliances in the direction of miniaturization, high energy and portability, and the gradual shortage of natural energy such as oil and gas, chemical power sources have attracted unprecedented attention. With the advancement of science and technology, people urgently need a battery with high energy density to adapt to the development trend of miniaturization and ultra-thinning of various electrical appliances. In lithium batteries, the theoretical specific capacity of graphite is only 372mAh / g, and the first charge-discharge cycle will produce a large irreversible capacity loss, while the theoretical specific capacity of metal lithium is 3860mAh / g, and the exchange current density of lithium electrodes Large, small polarization, is an ideal electrode mater...
Claims
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IPC IPC(8): H01M4/02H01M4/66H01M4/04C23C14/24
CPCY02E60/12Y02E60/10
Inventor 王殿龙戴长松王崇
Owner 严格集团股份有限公司
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