Personal Introduction

Prof. Yu Jie won the second prize of National Natural Science Award. Engaged in the research of nanomaterials and energy materials, published more than 170 articles, cited more than 6000 times, and authorized more than 60 patents. Technologies and materials such as vertical graphene thermal CVD growth technology, vertical graphene silicon carbon negative electrode, vertical graphene powder, high through-hole porous carbon, high-strength carbon nanofiber membrane, vertical boron nitride nanosheet and boron nitride continuous nanofiber were invented.

Team members

The technology and products of the new fiber team come from basic innovation and have strong leadership and advancement. Focus on vertical graphene silicon carbon anode materials and vertical graphene powder materials; The development and application of electrospun nanofibers and new carbon materials are devoted to making carbon materials shine and heat for human beings. The research and development of porous carbon atomizing core and carbon nanofiber infrared radiation heating tube has many years of original technology accumulation and independent intellectual property rights. Its main application scenarios are electronic atomization, electric heating, purification and separation, and its performance is superior to the existing commercial products. The team takes material technology as the main body and has a multidisciplinary background. With more than 10 professional technicians, the team has applied for and authorized more than 50 patents. With advanced technology, the team has always been at the forefront of the field and a pioneer in the field of new materials.

Core products

1. Porous carbon atomized core

The porous carbon atomizing core is a new generation of atomizing core invented by the project based on the original technology. It has applied for a number of patents. It is the first all-carbon atomizing core in the world. Its oil absorption, oil conduction and heating parts are all carbon materials. Its porosity is 65 ± 5%, its average pore size is 12 ± 4 μm, its median pore size is 9 ± 3 μm, its compressive strength is 11-12 MPa, and its resistivity is flexible and adjustable. The resistance value can be designed to be any value in the range of 1.0-1.8Ω according to the use requirements of the conventional electronic atomizer. Compared with the existing ceramic atomizing core sold in the market, the production process of the porous carbon atomizing core is green and efficient, and the cost is lower than that of the ceramic core; The oil absorption and guide performance is superior to that of a ceramic core, a bowl-shaped structure does not need to be designed, the ceramic core can be directly cut, processed and formed, and the assembly is simpler; a metal heating circuit and a grid do not need to be printed or inlaid, and the heating body is of a porous structure, so that the atomization area is larger, and the problem of carbon deposition in the heating and atomization process is avoided; More importantly, the atomizing amount of the porous carbon atomizing core is 1-5mg/puff higher than that of the ceramic core, while the power consumption is 0.5-1.5 W lower than that of the ceramic core, so the use experience of the consumer is better, the energy consumption is lower, and the electronic atomizer can last longer; At the same time, because the atomization area is larger and there is no metal heating catalysis, the release concentration of aldehydes in the porous carbon atomization core is lower than that in the ceramic core, which can provide safer and healthier products for consumers.

2. Nano carbon fiber infrared radiation heating tub

Carbon nanofiber infrared radiation heating tube is the world's first carbon heating tube, which has applied for a number of patents. The heating body used is the carbon nanofiber membrane independently developed by this project. Its resistivity is flexible and adjustable, and the resistance value can be designed to be any value within the range of 0.5-1.0 Ω according to the requirements of conventional heaters. It has high thermal stability, the resistance change rate is less than 5% after continuous working for 10000 hours, the temperature rise speed is fast, and the aerosol precursor can be heated to more than 300 deg C within 20 seconds; The heating area is larger than that of the existing metal heating tube sold in the market, the temperature field distribution is more uniform, the infrared emissivity is as high as more than 90%, and the penetrability of the temperature field to the aerosol precursor is stronger.

The electrospun nano carbon fiber membrane is prepared by preoxidizing, carbonizing and graphitizing an electrospun polyacrylonitrile fiber serving as a precursor, the diameter of the electrospun nano carbon fiber membrane is 100-200nm, compared with the diameter of the conventional carbon fiber, the diameter of the electrospun nano carbon fiber membrane is reduced by more than 20 times, the specific surface area of the electrospun nano carbon fiber membrane is increased by more than 20 times, the sectional area of the electrospun nano carbon fiber membrane is reduced by more than 400 times, a series of superior performances of the electrospun nano carbon fiber membrane are caused The application fields include high-strength composite materials, conductive composite materials, electromagnetic shielding, electrochemical electrodes, catalyst carriers, separation and filtration, heating elements, fuel cell gas diffusion layers, and the like.

Macroscopic photograph of electrospun carbon nanofiber membrane

Macroscopic photograph of electrospun carbon nanofiber membrane

The thickness of the electrospun carbon nanofiber membrane is 50-300 μm, the thickness is uniform and adjustable, the mechanical property is excellent, the tensile strength is 10 MPa, the electrical conductivity is good, the resistivity is 0.02 Ω · cm, and the temperature resistance is more than 500 deg C; Has a specific surface area of 50m 2 /G, good hydrophobicity and a wat contact angle of 148 deg.

            

3. Nano carbon fiber electric heating film

The carbon nanofibers have small diameter, large specific surface, large heating and radiation area, and a three-dimensional conductive network is formed among the fibers, so that the electric heating efficiency is high, the temperature rise speed is high, and the temperature is uniform. The preparation of the electric heating film is simple, and the stable heating at 30-400 deg C can be realized only by connecting the electrode and electrifying.

4. Alkene silicone SVG 2500

It is made by growing vertical graphene on the surface of nano-silicon, which is called alkene silicon for short. Gram capacity 2400-2800mAh · G ^-1 , first effect higher than 87%.

5.Alkene silicon compound graphite product SCGC series

Charge-discharge curve cycle curve stability

6. Vertical Graphene Powder

The vertical graphene powder is prepared by a chemical vapor deposition method and is in a spherical particle shape, the particle diameter is 200-400 nm, and the graphene sheets grow along the radial direction of the particle and are combined and fixed with each other to form a three-dimensional structure. The graphene sheets are well separated from each other in each vertical graphene particle and do not agglomerate during use.