Graphene starts a new round of smartphone revolution-a large inventory of graphene mobile applications
Graphene is known as the material with the highest strength, the best toughness, the lightest quality, the highest light transmittance, and the best conductivity in humans. It is precise because of the excellent physical properties of graphene that many mobile phone manufacturers regard it as the future technology field. Important material. In recent years, many companies have applied graphene to different components of mobile phones, and industrialization in the area of mobile phones is gradually maturing.
Graphene mobile app inventory
1. Heat dissipation
With the advent of the smartphone era, mobile phone processing power is becoming more powerful, more and more integrated functions, and CPU performance requirements are becoming higher and higher. The robust performance means increased power consumption and improved heat dissipation. Graphene heat dissipation film has a high theoretical thermal conductivity (up to 5300W / m · K), which is much higher than the thermal conductivity of graphite, carbon nanotubes and other carbon materials, which can maximize the heat dissipation performance of mobile phones and allow CPU Maintain it at its best and significantly improve the user experience.
In October 2018, the graphene liquid cooling technology adopted by Huawei's Mate 20 X mobile phone products officially marked the beginning of the commercialization of graphene cooling materials. Huawei fuses graphene and Vapor Chamber technology to create a SuperCool super heat dissipation system. Through the VC (Vapor Chamber) liquid cooling system, the heat of the heat source can be quickly transferred from the heat source chip and rely on graphite The heat dissipated by the alkene heat dissipation film to move the chip to the back shell is evenly distributed to the entire back shell to achieve the purpose of uniform heat dissipation of the whole machine.
2. Touch screen
In recent years, thanks to the rapid development of the smartphone and flat panel display market, the touch display has developed by leaps and bounds. Graphene has good conductivity and high optical permeability and can be used to make foldable and stretchable displays. Compared with the traditional indium tin oxide ITO conductor material, not only the mechanical strength and flexibility are excellent, but also the preparation process is environmentally friendly and requires fewer resources. Besides, with the continuous improvement of the production process, the production cost of graphene is expected to be much lower than the traditional indium tin oxide touch screen.
For example, the graphene mobile phone uses a 5.5-inch AUO original graphene touch screen with a resolution of 1920X1080 pixel FHD level, light transmittance of up to 97.7%, and the display effect is very outstanding.
With the advent of the 5G era, there is an urgent need for mobile phone batteries to achieve fast charging, electric thermal conductivity, and high energy density. The application of graphene to lithium-ion batteries can significantly improve battery-related performance and cycle life. Samsung, Apple, and others are increasing their capital and research investment in graphene-lithium cells to occupy the market high ground in this industry with the expectation.
The graphene-based lithium-ion battery can not only realize fast charging within 15 minutes under 5C conditions, but also work in an environment of -30 ℃ -80 ℃, with a cycle life of up to 3500 times, and the charging efficiency is 24 times.
Graphene makes the energy of headphones and speakers more efficient and smaller while producing better sound. Graphene can be used to make high-performance thin films, using headphones as a medium to provide high-quality sound texture, so that ears can feel high-quality audio-visual effects.
The dual "moving coil" unit of graphene diaphragm is used on the earphone of the mobile phone. The mid-low frequency is more robust, and it has vibrant detail expression; the high-frequency extension performance is better, and the penetration is richer. The "moving iron" treble is translucent, stable and natural, and feels the natural sound of three-band equalization.
Graphene's extremely high carrier mobility and good thermal conductivity make it possible to replace silicon and become the primary material for next-generation semiconductors. Studies have shown that graphene technology can increase chip speed by a million times. This technology can improve the computing power of the disk to an extremely high level in the process of transferring and storing data. Wafers are the necessary materials for manufacturing semiconductor chips. Therefore, the preparation of high-quality graphene single crystal wafers in a fast, batch-compatible, and wafer-process compatible manner is the key to the large-scale application of graphene as electronic-grade materials.
6. Other applications
Graphene has great potential. In addition to the above application directions, graphene can also be used in antennas and communications to increase optical data communication to an unprecedented rate, while reducing energy consumption and transmission errors; graphene has good conductivity and excellent light transmission And flexibility indicates that graphene can be applied to the flexible screen of mobile phones, improve the light transmission characteristics of the electrodes, and improve the reliability of the device. Although graphene has not yet achieved large-scale industrial applications in these fields, with the Huawei, Samsung, Apple, The in-depth research of mobile phone manufacturers such as Xiaomi will inevitably show its potential application value in the area of mobile phones.
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