At this year's Graphene Conference, many leading graphene technology companies in China were invited to participate. Among them, the graphene supercapacitor and graphene flexible transparent keyboard displayed by CQSM Graphene Technology Research Institute were eye-catching.
Graphene Super Capacitor
Can be widely used in rail transit, new energy vehicles and other fields
Super capacitor monomer, super capacitor mold
CQSM displayed EDLC cylindrical series products with a rated voltage of 3.2V and EDLC 16V, 400F super capacitor standard modules.
According to reports, the 3.2V pure power EDLC supercapacitor is the world's first, which improves the energy storage density of the capacitor from two aspects: the rated voltage and capacitance of the monomer.
The standard supercapacitor module is composed of 3.2V supercapacitors in series, which meets the milestone requirements for the energy density of supercapacitors in ultra-large-scale applications such as new energy vehicles and electric energy storage. It has large specific energy, high power, long life, charge and discharge The speed can reach the second level, it meets RoHS requirements (lead-free), and can be wirelessly charged.
Compared with batteries, supercapacitor products have very high specific power, long service life, and no pollution to the environment. They are an efficient, safe and environmentally friendly energy storage device. It can be widely used as a power source or energy source in rail transit, new energy vehicles, new energy grids and energy storage, electric tools, UPS power supplies, ports and heavy machinery, 3C smart electronic products, and military industries.
Compared with the 2.7V supercapacitors in the industry, the above two products mainly have the following advantages:
Under the same size, the single voltage platform is higher, the capacity and energy density are larger;
Modules (systems) under the same voltage platform use fewer monomers, lighter weight, smaller volume, higher mass and volume energy (power) density and lower price;
Due to the single high-voltage platform, some areas can replace lithium batteries and lithium capacitors (the 2.7V platform cannot be realized).
Graphene flexible transparent keyboard
Can be handwritten, keys can be bent
At present, the common computer keyboards on the market are large in size, inconvenient to carry, separated from the keyboard and mouse, easy to break, sound when tapped, and are not waterproof.
It is less than 1 mm thick and only the size of a sheet of A4 paper. It is lightweight, waterproof, and even bendable for easy carrying.
At the same time, the graphene flexible transparent keyboard has keyboard button function, mouse function and handwriting function.
The keyboard introduces a driver-free design, and the smart terminal does not need an external signal receiving port or install a driver to realize the connection with the keyboard.
High-performance polyvinyl alcohol/graphene (PVA/GN) nanocomposite hydrogel artificial cartilage
Bringing good news to patients with bone and joint pain
The clinical incidence of osteoarthritis and other osteochondrosis caused by sports injuries, trauma, degeneration, diabetes, gout and other diseases caused by cartilage defects and deformities is increasing. It is reported that about 5% of people worldwide suffer from various degrees of osteoarthropathy.
However, the self-healing ability of articular cartilage is very weak, and it is difficult to regenerate once damaged.
At present, artificial articular cartilage replacement is often used in clinical repair. The materials used are mostly metals (such as titanium alloy), ceramics, ultra-high molecular weight polyethylene, polyurethane and silicone rubber, etc., but due to the accumulation of metal cations in the body and stress shielding , The large amount of wear debris produced by poor wear resistance causes defects such as osteolysis, easy aging, residual carcinogens, and low strength, and it is difficult to completely replace articular cartilage to obtain practical applications.
Therefore, it is urgent to develop artificial cartilage substitute materials with excellent performance.
In July 2019, CQSM and Sichuan University jointly developed a high-performance polyvinyl alcohol/graphene (PVA/GN) nanocomposite hydrogel artificial cartilage substitute material and product.
The product has the characteristics of non-toxic, no side effects, excellent biocompatibility, stable chemical properties, good flexibility and high elasticity, excellent lubricity, and small stress shielding. It is considered to be an ideal material for cartilage replacement.
The project has currently applied for a Chinese invention patent "a method for preparing high-strength polyvinyl alcohol hydrogel artificial cartilage substitute material".