All-solid-state battery Who is the first car company to eat crabs?
According to analysis of major customers of Mitsui Metals, its main customers are Toyota, Honda and other major automobile manufacturers. At present, Toyota and Honda are actively expanding their new energy vehicle business. The two car companies have made certain progress in hydrogen fuel cell vehicles.
Earlier, the Toyota Mirai fuel cell vehicle has completed drive tests in February this year. Recently, it was reported that Toyota is planning to apply medium-sized fuel cell technology to heavy commercial trucks. In a recent statement, Toyota said it is ready to test the feasibility of large-scale hydrogen-powered systems in semitrailers in California.
At the 2015 Tokyo Motor Show, Honda's fuel cell car, the Clarity Fuel Cell, made its world debut. It is reported that Honda's new fuel cell vehicle will be listed at the end of 2016. At the same time, according to the US Environmental Protection Agency's determination, the maximum mileage of the Honda Clarity Fuel Cell can reach 590 kilometers.
It is not difficult to see from these two companies that the two companies are focusing on hydrogen fuel cell vehicles and there is no indication that they are developing all-solid-state battery vehicles. So, who would be the first car company to get the "all-solid-state battery" experience right?
The outside world has always believed that Toyota only makes fuel cell vehicles. In fact, it is the simultaneous development of fuel cell vehicles and pure electric vehicles. Because Toyota had a problem with the "all-solid-state battery", the Toyota hydrogen fuel cell car was introduced first. In the future, Toyota's Class A cars will be pure electric cars, and B-class cars will have fuel-cell cars. The direction of pure electric vehicles is miniaturization, intelligence, fashion and light weight, and ultimately combined with automatic driving.
"All-solid-state battery" is so cattle?
All-solid-state lithium batteries, ie, battery cells, including positive and negative electrodes, and electrolytes all use solid-state lithium secondary batteries, whose electrolytes are solid, and have a density and structure that allows more charged ions to collect at one end and conduct more. Current, which in turn increases battery capacity. Mitsui Metals This technology, based on its unique technology, holds the conductivity of lithium electrons at the same water level as the electrolyte, and develops electrochemically stable sulfide solid-state electrolytes that also achieve high mass production.
The advantages of all-solid-state batteries are more pronounced than liquid lithium ions. Its advantages mainly include the suppression of lithium dendrites; good circulation, safety, stable internal resistance, low power attenuation, high reliability, long life, high energy density in volume and area, high voltage, simplified module design, and easy flexibility Matching group; high energy density.
At present, there are two problems in the industrialization of all-solid-state batteries: First, the ionic conductivity of the solid electrolyte at room temperature is not high; second, the interface impedance between the solid electrolyte and the positive and negative electrodes is relatively large.
"All-solid-state battery" to achieve mass production just around the corner
At this stage, China's most used liquid batteries, a small batch of semi-solid batteries, solid-state lithium-ion batteries put into use, all solid-state batteries to achieve mass production, it will take a certain period. However, various countries have already started R&D on "all-solid-state batteries".
In China, many research institutes and companies have already started to develop "all-solid-state batteries" and achieved certain results. At present, China has done two more powerful teams for all-solid-state batteries: one is the Chen Liquan Institute of Physics of the Chinese Academy of Sciences, and the other is the team of Li Wei, and the other is the team of Dr. Xu Xiaoxiong of the Ningbo Institute of the Chinese Academy of Sciences. In addition, Zhongnan Chuangye is also committed to the development of “all-solid-state batteriesâ€, and the products have made phased progress.
It is understood that Ningbo Institute of Materials Science and Technology has achieved certain results in polymer research. It uses graphite as the negative electrode and sulfide composite electrolyte. This electrolyte is inorganic. Lithium cobaltate is used as the positive electrode. The 4Ah battery has an energy density of 240 Wh/kg, 500 cycles at room temperature, and a capacity of more than 88%. Through a series of acupuncture, overcharge, short circuit, forced discharge, high temperature cycle experiments. The inorganic oxide electrolyte used passed all safety tests.
On November 22, the website of the Chinese Academy of Sciences disclosed that Qingdao Energy has made progress in the research of high energy density solid-state batteries. In response to the bottleneck problem of excessive solid-state interface resistance in the development of solid-state batteries, researchers from the Chinese Academy of Sciences have creatively proposed a solution for in-situ self-forming solid electrolytes. , effectively reduce the interface impedance and improve the overall performance of the battery.
Dr. Li Wei stated in Zhangjiagang's “2016 China New Energy Automobile Power Battery Industry Technology Development Summit Forum and Technology Exchange Conference for Automotive Enterprises and Power Battery Enterprises†that “After a breakthrough in key cell technology materials, all-solid-state batteries can quickly enter In the market, the Chinese Academy of Sciences proposed a number of roadmaps. The battery packs will be released in 2019 as soon as possible. It is possible to test the water to commercialization level by 2020. Some solid-state ones are still relatively slow, and the real all-solid state may be even more For a long time, batteries that contain a little liquid will be faster because of the balance between energy density and safety."
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