Towards carbon neutrality, silicon carbide becomes the big shovel to dig the new energy industry?

Towards carbon neutrality, silicon carbide becomes the big shovel to dig the new energy industry?

2022-05-24 13:35:37 3

Carbon peak refers to China's commitment to stop the growth of carbon dioxide emissions by 2030, and gradually reduce them after reaching the peak.


Carbon neutral means that enterprises, groups or individuals measure the total amount of greenhouse gas emissions produced directly or indirectly within a certain period of time, and then offset their own carbon dioxide emissions through planting and reforestation, energy conservation and emission reduction, etc., to achieve "zero" carbon dioxide emissions.

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Global carbon dioxide emissions are increasing year by year, with global emissions reaching 34.17 billion tons in 2019, with an average annual compound growth rate of 2.1%. China's total carbon emissions account for 1/3 of the total global carbon emissions, which are 2 and 3 times higher than those of the United States and the European Union, respectively. China's per capita carbon emission is 8 tons, which is comparable to that of the EU. It can be said that it is imperative to achieve "carbon peaking and carbon neutral".


What is the mysterious relationship between "double carbon", silicon carbide and new energy?


Energy saving and emission reduction is the core work of carbon peak and carbon neutral. This involves upgrading and reforming the energy structure, which can be achieved gradually by improving the utilization rate of energy and enhancing the proportion of green energy. For example, to achieve "carbon neutrality" in China, we need to make efforts in the following directions: expanding photovoltaic power generation and wind power generation on the supply side; enhancing the proportion of new energy vehicles on the demand side; making efforts on extra high voltage on the transmission side, and comprehensively Development of new energy!


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Silicon carbide as the third generation of broadband semiconductor materials, with a wider band width, higher breakdown electric field, higher thermal conductivity, greater electron saturation drift rate and higher radiation resistance, is the ideal material for manufacturing high-temperature, high-frequency, high-power semiconductor devices, silicon carbide is the above-mentioned areas of the upstream core materials, to achieve "carbon neutral "multiple routes, can not get around it!


To mine, first buy shovel! It can be said that silicon carbide is exactly the development of new energy industry shovel!


Adjust the energy structure and develop clean energy such as solar energy


It is said that the development of new energy vehicles is the biggest hot spot for energy saving and emission reduction today, but it is generally believed that it is not the key. Why? In fact, whether it is a new energy car or a fuel car, we have to look at what is the initial source of the power it needs, and how about carbon emissions in the process.


Fuel cars are powered by burning oil, and there is no doubt that carbon emissions occur in this process.


What about electric cars, are they really as green and pollution-free as advertised? Where does the electricity it uses come from? Most of it is thermal power generation, that is, its power source is coal combustion, the process of carbon emissions is also scary enough, right.


Here I suddenly thought of some time ago the Internet is very hot a real thing, a group of lawless elements will be 100,000 yuan of coins melted to try to create more counterfeit money, so through a variety of means finally completed, the last count, silly, and finally only made 70,000 yuan coins. Citing this example, I would like to say is that only the source of electricity is green, no carbon emissions, we can next talk about new energy vehicles, if there will be more carbon emissions in the process of generating electricity, it is simply a loss of business.


Therefore, in July this year, Liu Ke, a foreign member of the Australian National Academy of Engineering and director of the School of Innovation and Entrepreneurship of the Southern University of Science and Technology, clearly pointed out in his speech on "carbon neutrality" that if the energy structure does not change, if 67% of the power grid is still coal, then electric vehicles are increasing carbon emissions, not reducing them. Only when the energy mix and the grid are mostly made up of renewable energy, can electric vehicles be considered a clean source.


So we need to emphasize the adjustment of the energy structure, and in the new green energy, silicon carbide can play an important role.


Solar and wind power generation system is the use of photovoltaic panels photovoltaic effect or wind-driven generator, the direct conversion of solar energy or wind power into electricity generation system, its main components are photovoltaic battery components, wind turbines, energy storage batteries, controllers, inverters, motor drives, etc., its characteristics are high reliability, long service life, do not pollute the environment, independent power generation or grid-connected operation, by the governments of various countries and enterprises, and has a broad development prospect.


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Silicon carbide power devices are designed for high-power module applications such as solar inverters, uninterruptible power supply equipment, and wind motor drives, with smaller size, lower material cost, and higher efficiency. The average efficiency of silicon carbide-based inverters can be increased to 97.5%, which is equivalent to a 25% reduction in inverter losses, and silicon carbide-based inverters can increase conversion efficiency by 20% in wind power applications.


In the field of nuclear energy, the conceptual design and preparation of new fuel elements using silicon carbide as a casing or matrix material for fuel rods in fourth-generation nuclear reactors - high-temperature gas-cooled reactors - has become a new hot material in the field of nuclear fuel elements.


Various models of novel and functional fuel elements with silicon carbide as an important casing and matrix material have been designed continuously, and the commercialization of silicon carbide casing fuel elements for high-temperature gas-cooled reactors has already begun. It is foreseeable that, with the increase of nuclear safety requirements, silicon carbide materials will be used in nuclear reactors. It is foreseeable that with the continuous improvement of nuclear safety requirements, silicon carbide materials will be more widely used in the field of nuclear energy and play a more important role.


New Energy Vehicles

Next we talk about new energy vehicles.


Silicon carbide as the future electric vehicle charging module and electric module related to the important core of advanced electronic materials, can achieve green travel energy supply, low-carbon, intelligent, sustainable development, and ultimately seize the high ground of future industrial development. Silicon carbide devices on the charging module performance improvement is mainly reflected in three aspects.


(1) Improving frequency and simplifying power supply network.

(2) Reducing losses and temperature rise.

(3) Reduce the size and improve the efficiency. Based on our analysis of the advantages of silicon carbide devices in wired charging (high efficiency, low temperature rise, high density, low loss), it shows that the overall cost will be lower.


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Silicon carbide devices can improve the power conversion performance of pure electric vehicles or hybrid electric vehicles. The electric module of electric vehicle is an active load, its speed range is wide, and in the process of driving need to frequently accelerate and decelerate, working conditions are more complex than the general speed control system, the use of silicon carbide power devices can effectively improve its drive system, to obtain a higher breakdown voltage, lower open resistance, greater thermal conductivity and can work steadily at higher temperatures, the original several kilograms of heat sink can be significantly This will cause a revolutionary change in the design of electric vehicles and reduce the power conversion energy loss of electric or hybrid vehicles by 20%, which is of great significance to significantly increase the range of electric vehicles.

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About GRISH

was established in June 2001, is a national high-tech enterprise specializing in the research and development, production and operation of ultra-precision grinding and polishing materials in China, and is a pioneer in the industry with a number of international and domestic independent intellectual property rights, many years of experience in product technology development and many customer applications.


GRISH provides customers with specialized and customized grinding and polishing solutions, as well as a variety of complementary and serialized precision grinding and polishing material products, processes and equipment, focusing on solving customers' high-end needs of ultra-precision grinding and polishing, and helping customers succeed!


Its ultra-precision polishing film & polishing tape, electrostatic flocking abrasive tape & polishing tape, 3D three-dimensional bump abrasive, single crystal & polycrystalline & polycrystalline like - diamond micro powder and corresponding abrasive solution, CMP polishing solution, abrasive additives and other ultra-precision polishing consumables developed and produced by GRISH are widely used in optical communication, automotive, semiconductor, LED, sapphire, ceramics, LCD, 3C electronics, rollers, oral medicine and other industries, and have been exported to many countries and regions such as USA, UK, Germany, Russia, Japan, Korea, India, Brazil, etc.

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