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According to the analysis of major customers of Mitsui Metals, its main customers are major automobile manufacturers such as Toyota and Honda. At present, Toyota and Honda are actively expanding their new energy vehicle business, and the two car companies have made certain progress in hydrogen fuel cell vehicles.
Previously, the Toyota Mirai fuel cell vehicle had completed the road test in February this year. Recently, it is reported that Toyota is planning to apply medium-sized fuel cell technology to heavy-duty commercial trucks. In a recent statement, Toyota said it is preparing to test the feasibility of a large hydrogen-powered system in a semi-trailer truck in California.
At the 2015 Tokyo Motor Show, Honda's fuel cell vehicle, Clarity Fuel Cell, made its world premiere. 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, the Honda Clarity Fuel Cell has a cruising range of up to 590 kilometers.
It is not difficult to see from these two companies that the two companies are mainly targeting hydrogen fuel cell vehicles, and there is no indication that they are developing all-solid-state battery vehicles. So, who will be the first car companies to get the “all-solid-state battery” experience right?
The outside world has always believed that Toyota only makes fuel cell vehicles, which is actually the simultaneous development of fuel cell vehicles and pure electric vehicles. Because Toyota's "all-solid-state battery" has an unresolved problem, the Toyota hydrogen fuel cell vehicle was first introduced. In the future, Toyota A-class cars will be pure electric vehicles, and B-class vehicles will be fuel cell vehicles. The direction of pure electric is miniaturization, intelligence, fashion and light weight, and finally combined with autonomous driving.
"All solid-state battery" is so cow?
All-solid-state lithium battery, that is, each unit of the battery, including a lithium secondary battery in which the positive and negative electrodes and the electrolyte are all made of a solid material, the electrolyte is solid, and the density and structure allow more charged ions to gather at one end, and the conduction is larger. Current, which in turn increases battery capacity. Mitsui Metals This technology holds the conductivity of lithium electrons at the same level as the electrolyte according to its unique technology, and has developed an electrochemically stable sulfide solid electrolyte, which also achieves high mass productivity.
The advantages of all-solid-state batteries are more pronounced than liquid lithium ions. Its advantages mainly include inhibition of lithium dendrites; good cycle, safer, stable internal resistance, slow power decay; high reliability, long life; high volume and area energy density; high voltage, simplified design of module and system, easy to be flexible Matching; 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 is just around the corner
At this stage, the most used in China are liquid batteries, small-volume semi-solid batteries, solid-state lithium-ion batteries are put into use, and all-solid-state batteries must be produced in a certain period of time. However, countries have already launched research and development on "all solid state batteries."
In China, many research institutes and enterprises have begun to develop "all-solid-state batteries" and achieved certain results. At present, there are two more powerful solid-state batteries in China: one is the team of Chen Liquan and Li Wei from the Institute of Physics of the Chinese Academy of Sciences, and the other is the team of Dr. Xu Xiaoxiong from the Ningbo Institute of the Chinese Academy of Sciences. In addition, Zhongnan Chuangfa is also committed to the research and development of “all solid state batteries”, and the products have made progress in stages.
It is understood that the Ningbo Materials of the Chinese Academy of Sciences have achieved certain results in polymer research. It uses graphite as the negative electrode and sulfide composite electrolyte. This electrolyte is inorganic. Using lithium cobalt oxide as the positive electrode, the 4Ah battery has an energy density of 240 watt-hours/kg, 500 cycles at room temperature, and a capacity of over 88%. Passed a series of experiments on acupuncture, overcharge, short circuit, forced discharge, high temperature cycle. The inorganic oxide electrolyte used passed all safety tests.
The website of the Chinese Academy of Sciences disclosed on November 22 that Qingdao Energy has made progress in the research of high-energy-density solid-state batteries. The research team members of the Chinese Academy of Sciences have creatively proposed solutions for in-situ self-forming solid electrolytes in order to solve the bottleneck problem of excessive solid-state interface impedance in solid-state batteries. , effectively reduce the interface impedance and improve the overall performance of the battery.
Dr. Li Wei’s “2016 China New Energy Vehicle Power Battery Industry Technology Development Summit Forum and Technical Exchange Meeting for Vehicle Enterprises and Power Battery Enterprises” in Zhangjiagang stated that “once the breakthrough of key materials in battery technology, all solid-state batteries can be quickly entered. In the market, the Chinese Academy of Sciences has proposed some roadmaps. The battery pack will be available in 2019. In 2020, it is possible to test the water to commercialization. Some solid-state ones are still slower. The real whole solid state may be more For a long time, a battery with a little liquid will be faster because of the energy density and safety."
