Porous carbon framework-nanoparticle composite material, metal lithium complex thereof, as well as preparation methods and application thereof

A nanoparticle and composite material technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as increased internal resistance of batteries, attenuation of battery cycle capacity, and interface instability, etc., to achieve Effects of reducing current density, suppressing formation of lithium dendrites, and improving safety

Pending Publication Date: 2019-02-05
CHINA ENERGY CAS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unfortunately, the lithium metal negative electrode is prone to dendrites during the cycle, and the dendrites will pierce the battery separator and cause a short circuit to release huge heat, causing a series of safety acc

Method used

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  • Porous carbon framework-nanoparticle composite material, metal lithium complex thereof, as well as preparation methods and application thereof
  • Porous carbon framework-nanoparticle composite material, metal lithium complex thereof, as well as preparation methods and application thereof
  • Porous carbon framework-nanoparticle composite material, metal lithium complex thereof, as well as preparation methods and application thereof

Examples

Experimental program
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specific Embodiment approach 1

[0077] Embodiment 1 is a porous carbon skeleton-nanoparticle composite material, wherein the nanoparticles are lithium-reactive metal or oxide nanoparticles, and are distributed in the pores and on the surface of the porous carbon skeleton.

specific Embodiment approach 2

[0078] Embodiment 2 is the porous carbon skeleton-nanoparticle composite material according to Embodiment 1, wherein the porous carbon skeleton is a carbon-based porous material with a particle size of 1-100 microns and nanoscale pores inside and on the surface , preferably, the carbon-based porous material is formed by one or more of carbon nanotubes, carbon nanofibers, carbon black, acetylene black, Ketjen black, Super P, graphite, mesocarbon microspheres and porous activated carbon .

specific Embodiment approach 3

[0079] Embodiment 3 is the porous carbon skeleton-nanoparticle composite material according to Embodiment 1 or 2, wherein the porous carbon skeleton is formed by intertwining and agglomerating carbon nanotubes or carbon nanofibers. microspheres with nanoscale pores.

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Abstract

The invention discloses a porous carbon framework-nanoparticle composite material, a metal lithium complex thereof, as well as preparation methods and application thereof. The porous carbon framework-nanoparticle composite material is prepared from a lithium-reactive metal which is distributed in pores and on the surface of a porous carbon framework or nanoparticle oxide thereof. By adopting the porous carbon framework-nanoparticle composite material, the nucleation energy of metal lithium in combination with the porous carbon framework can be lowered, or the affinity between the lithium and framework carbon is improved, and the security and/or cycling stability of a battery are enhanced.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a porous carbon skeleton-nano particle composite material, its metal lithium composite, their preparation method and application. Background technique [0002] Lithium battery is a secondary battery (rechargeable battery), which mainly relies on the movement of lithium ions between the positive and negative electrodes to work. During the charging and discharging process, Li + Intercalation and deintercalation back and forth between two electrodes: when charged, Li + It is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the opposite is true during discharge. Due to its high energy density, environmental friendliness and good cycle stability, lithium batteries have been widely used in electronic products, smart grids and other fields. However, the internal components of current electronic products are becoming m...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/40H01M4/42H01M4/46H01M4/485H01M4/62H01M10/052B82Y30/00
CPCB82Y30/00H01M4/362H01M4/38H01M4/381H01M4/382H01M4/405H01M4/42H01M4/466H01M4/485H01M4/625H01M10/052H01M4/02H01M4/36H01M4/40H01M4/46H01M4/62Y02E60/10
Inventor 康拓陈立桅卢威沈炎宾王亚龙郭峰刘承浩陈鹏
Owner CHINA ENERGY CAS TECH CO LTD
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