Lithium metal secondary battery based on porous ceramic composite lithium metal negative electrode and preparation method thereof

A porous ceramic and metal negative electrode technology, which is applied in the field of high specific energy lithium metal secondary batteries, can solve the problems of uncontrolled growth of lithium dendrites, low coulombic efficiency of batteries, battery safety issues, etc., to achieve mass production, Simple preparation method and high Coulombic efficiency
CN110890530AActive Publication Date: 2020-03-17SUZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SUZHOU UNIV
Publication Date
2020-03-17

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Abstract

The invention belongs to the field of high-specific-energy lithium metal batteries, and particularly discloses a lithium metal secondary battery based on a porous ceramic composite lithium metal negative electrode and a preparation method of the lithium metal secondary battery. The porous ceramic lithium metal negative electrode is composed of a porous ceramic skeleton, a conductive layer and lithium metal, and compared with a traditional lithium sheet negative electrode, the porous ceramic lithium metal negative electrode disclosed by the invention has the advantages that the porosity of theporous ceramic skeleton can provide sufficient storage space for the lithium metal; the rigidity of the porous ceramic skeleton can maintain the structural stability of the lithium metal negative electrode; the large specific surface area attribute of the porous ceramic skeleton can effectively reduce the local current density of the lithium metal negative electrode and relieve the growth problemof lithium dendrites. Based on the advantages, the porous ceramic lithium metal composite negative electrode can be used for preparing a high-specific-energy lithium metal secondary battery. Meanwhile, the preparation method is simple, and large-batch manufacturing can be realized.
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Description

technical field

[0001] The invention belongs to the field of lithium metal secondary batteries, in particular to a lithium metal negative electrode based on a porous ceramic host, and a high specific energy lithium metal secondary battery prepared therefrom, including an organic electrolyte system lithium ion battery and a lithium-air battery, All solid-state lithium-ion batteries and lithium-air batteries, etc. Background technique

[0002] With the popularity of electric vehicles and various electronic products, high specific energy secondary lithium batteries have become a research hotspot in recent years. Due to its high energy density and low chemical potential (-3.04 V vs. RHE), lithium metal has great prospects in the application field of high specific energy lithium secondary batteries. However, during repeated charging and discharging, lithium dendrites grow uncontrollably, which can easily pierce the separator and cause battery safety issues, which limits its wide...

Claims

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