Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

603results about How to "Inhibition of contraction" patented technology

Lithium ion battery composite diaphragm and preparation method and application thereof

The invention discloses a lithium ion battery composite diaphragm and a preparation method and an application thereof, belonging to the technical field of lithium ion batteries. The composite diaphragm comprises a polyolefin microporous membrane, a polymer microsphere based coating on one side surface of the polyolefin microporous membrane, and an inorganic ceramic-based coating on the other side surface of the polyolefin microporous membrane. The lithium ion battery composite diaphragm has good air permeability, liquid retaining capability and high-temperature resistance and can remarkably improve the security and the circulation property of the battery. The melting point or softening point of the polymer microsphere-based coating in the composite diaphragm is 90-140 DEG C, and when the temperature of the battery is increased, the polymer microsphere based coating is molten or swelled within a short time, then the apertures of the polyolefin microporous membrane are blocked rapidly, the thermal turn-off effect of the diaphragm is achieved, a lithium ion conveying channel is cut off, and short circuit inside the battery is prevented; meanwhile as ceramic grains inside the inorganic ceramic-based coating have the high-temperature resistance property, the polyolefin microporous membrane is effectively prevented from shrinkage, and the situation that positive and negative films directly come into contact to cause short circuit of the battery.
Owner:SHANGHAI FANNENG NEW MATERIAL TECH CO LTD

Preparation method of high-specific-surface-area high-electric-conductivity graphene compound carbon aerogel based on chemical crosslinking

InactiveCN106365142AControl volume and pHBreak down the activation processMaterial nanotechnologyOther chemical processesSupercritical dryingReduction treatment
The invention relates to a preparation method of high-specific-surface-area high-electric-conductivity graphene compound carbon aerogel based on chemical crosslinking. Graphene oxide is added to a precursor solution of resorcinol and formaldehyde to adjust the pH value, chemical crosslinking graphene oxide / RF organic wet gel is obtained through sol-gel reaction, graphene oxide / RF organic aerogel is obtained through acid pickling, solvent replacing and carbon dioxide supercritical drying, and the graphene compound carbon aerogel is prepared through high-temperature pyrolysis reduction treatment. By adding dispersion liquid of graphene oxide to the precursor solution of resorcinol and formaldehyde to adjust the pH value, the uniformity and crosslinking property of doped graphene are ensured, the framework strength of a three-dimensional nanometer network is remarkably enhanced, and the severe contraction collapse phenomenon happening in the carbonizing process of low-density carbon aerogel is greatly improved. The prepared graphene compound carbon aerogel has extremely low apparent density, superhigh specific surface area and excellent electric conductivity and heat conductivity and can be more easily processed into molding products of various forms in the application process.
Owner:TONGJI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products