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Advanced Carbon Materials

At present, a large amount of manpower and material resource have been invested in the development of graphene application technology worldwide, But there still lack of breakthrough in substantial industrial technology. The fundamental reason is the lack of mass production technology for high-quality graphene. For powder materials with the largest application volume, the defect rate of graphene materials on the market is too high, and it is essentially equivalent to "carbon black". It severely limits the application technology development of graphene in fields of chemical energy storage, new energy vehicles, advanced functional materials and devices. It is also the critical bottleneck of industrialization promotion.

There is existing bottlenecks of graphene technology: “3 high 1 low” (high pollution, high defect, high cost and low yield), the U.S.-directed redox method is high pollution and high defect, the Cambridge plasma method is high cost and low yield. For these problems, Prof. Shao guosheng's team from Zhengzhou (new century) material genome engineering institute (ZMGI) has invented a low-cost, whole-process green preparation technology for high-quality graphene powder, and has applied for national and international invention patents.

Main features: the method is simple, the cost is only 1/1000 of the British plasma method, and the quality is better, suitable for large-scale mass production and promotion. Large-scale promotion will fully change the current situation, the lack of high-quality graphene powder mass production technology in the graphene technology field. Through the popularization of low-cost high-quality graphene powder materials, a hundred billion grade graphene technology industrial cluster and alliance will be formed to create an internationally leading graphene technology industrial highland.

ZMGI industrialization progress of graphene project:

March 3, 2017, ZTE development formally signed a cooperation agreement with ZMGI in Zhengzhou to promote the industrialization of graphene and the application in phone battery.

April 23, 2017, Xingyang city investment and development co., ltd. and ZMGI formally signed a graphene technical cooperation project agreement in Zhongyuanzhigu.

September 12, 2017, Zhengzhou advanced material science and technology co., ltd. was registered and established www.zamtl.com to start construction of the graphene production base. It is planned to establish a graphene industrial science and technology park through the model of "one institute, one park and one industry".

Image left: typical scanning electron microscopy (SEM) of ZMGI graphene powder shows ultrathin and transparent graphene "petals".

Image right: Raman comparison between ZMGI graphene products and international mainstream graphene powder products. It shows that the G peak positive shift and 2D peak negative shift coexist for the first time in the world, and that G and 2D main peak shift correspond to single-layer graphene.


The application of ZMGI graphene in energy storage devices

Graphene with highly conductive and specific surface properties can form a continuous and efficient three-dimensional point-to-point network after mixing with binder and active electrode material. Compared to the traditional conductive additive, the graphene can reduce the content of conductive additive in the electrode and improve the electronic conductivity of the electrode. Therefore, it would improve the energy density of the energy storage devices by increasing the weight ratio of active electrode materials and ensure its performance at the same time. It is a kind of next generation conductive additive.

Image: Application of ZMGI graphene in phone soft-pack battery, Li-S battery.


The application of ZMGI graphene in Energy-saving heating equipments

The electrothermal radiation heating film prepared by using graphene has the advantages of rapid heating, low energy consumption, flexible mechanical properties and ultra-thin volume. All of this enable it to be widely used in industry, agriculture, medical treatment, building heating,  drying of transportation and other fields. Compared with the traditional electrothermal radiation and electrothermal convection heating equipment adopted in the market, the application of new advanced carbon material technology have great advantages in production cost, efficiency of installation and use.

Image aboveA graphene-based electrothermal film with a very thin structure and excellent flexibility.

Image below leftThe infrared image (40 ° C) of graphene electrothermal film heated 6 seconds in the power density of 0.1 W/cm2. 

Image below rightThe infrared image (60 ° C) of graphene electrothermal film heated 10 seconds in the power density of 0.1 W/cm2.



Patent application in advanced carbon materials

1. A method for preparing graphene. Inventor: Shao Guosheng; Zhang Peng; Zhang Shijie. 

2. A kind of low-defect graphene and preparation method. Inventor: Shao Guosheng; Zhang Peng; Zhang Shijie.

3. Graphene composites and their preparation methods and applications, graphene-carbon nanofiber films and their preparation methods. Inventor: Shao Guosheng; Zhang Peng; Wan Dongyang.

Published papers in advanced carbon materials

10.Confining sulfur in intact freestanding scaffold of yolk-shell nanofibers with high sulfur content for lithium-sulfur batteries. Journal of Energy Chemistry 51 (2020) 378–387
9.In situ sulfur-doped graphene nanofiber network as efficient metal-free electrocatalyst for polysulfides redox reactions in lithium–sulfur batteries. Journal of Energy Chemistry 47 (2020) 281-290.
8.“Room-like” TiO2 Array as a Sulfur Host for Lithium-Sulfur Batteries: Combining Advantages of Array and Closed Structures. ACS Sustainable Chem. Eng. 2020, 8, 7609-7616.
7.Vertically aligned graphene nanosheets on multi-yolk/shell structured TiC@C nanofibers for stable Li–S batteries. Energy Storage Materials 27 (2020) 159-168.
6. Mechanistic investigations of N-doped graphene/2H(1T)-MoS2 for Li/K-ions batteries. Nano Energy 78 (2020) 105352.
5. Heater-Free and Substrate-Independent Growth of Vertically Standing Graphene Using A High-Flux Plasma-Enhanced Chemical Vapor Deposition. Adv. Mater. Interfaces 2020, 2000854.
4. High-quality rGO/MoS2 composite via a facile “prereduction-microwave” strategy for enhanced lithium and sodium storage. Journal of Alloys and Compounds, 2019, 821, 153207.
3. Porous Carbons: Structure-Oriented Design and Versatile Applications. Adv. Funct. Mater. 2020, 1909265.
2. Construction of low-defect and highly conductive 3D graphene network to enable great-sulphur-content cathode for high performance Li–S/graphene batteries. J. Mater. Chem. A, 2018,6, 22555-22565.
1.RGO-functionalized polymer nanofibrous membrane with exceptional surface activity and ultra-low airflow resistance for PM2.5 filtration. Environ. Sci.: Nano 2018, 5, 1813-1820.