Low-cost all-solid-state lithium battery

by:CTECHi     2021-09-27
John Goodenough, a professor of mechanical engineering and materials science at the University of Texas at Austin, is the co-inventor of lithium-ion batteries. The 94-year-old Professor Goodenough led a team to invent a fast-charging low-cost all-solid-state battery. The research report was published in ' Energy and Environmental Science' journal. Therefore, the good enough title is not an adjective but a person's name, that is, the grandfather of the title picture. Let's take a look at this black technology with Xiaoxing. The official Chinese translation of Professor John Goodenough is Professor John Goodenough, but I prefer to call him Professor 'Good Enough' according to the literal translation. Because the name is really a little domineering. What? Don't know who the 'good enough' old man is? Let Xiaoxing tell you about his life story. He invented a rechargeable lithium-ion battery. After leaving the MIT Lincoln Laboratory in the 1970s, the old man received an invitation from the University of Oxford and entered the inorganic chemistry laboratory to start his solid-state chemistry research. road. The project team he led and SONY have developed a rechargeable ion battery based on carbon material anode and lithium cobalt oxide LiCoO2 material cathode. This is the lithium-ion battery technology that is currently widely used. A123’s M1B series 26650 battery develops lithium iron phosphate battery technology: Lithium-ion batteries based on lithium cobalt oxide LiCoO2 are costly due to the scarcity of cobalt. The old man has always wanted to find a lower cost and higher performance lithium battery technology. In 1986, Mr. 'Good Enough' was hired as a professor in the School of Mechanical and Electrical Engineering at the University of Texas Odin College. During this period, he led the project team to develop a low-cost lithium iron phosphate LixFePO4 cathode material. Its safety has been proved by experiments that it can fully meet the high-power battery applications of hybrid electric vehicles. The material patent was eventually bought by Hydro-Quebec and applied to hybrid electric vehicle applications. The positive electrode material is finally proved by the market to have good charge and discharge performance, low cost, safety and no pollution to the environment. Among the internationally renowned battery suppliers, the lithium battery technology used by A123, which is currently acquired by Wanxiang, is the lithium iron phosphate LixFePO4 anode material patent. The A123M1A and M1B lithium iron phosphate battery series are eclipsed by their excellent battery cycle life, safety, low self-discharge (almost unlimited inventory storage life) and other characteristics, making the NiMH batteries known for these advantages overshadowed. The picture below shows A123's M1B series 26650 battery. The specific model is ANR26650M1-B. The meaning of 26650: 26 is the diameter of a cylindrical battery, and 650 is the length of the battery. Therefore, the 26650 battery is the same length as the 18650 battery used in the Tesla car, and has a larger diameter. The 'Good Enough' professor received the National Medal of Science (also known as the Presidential Medal of Science) awarded by US President Barack Obama in 2013 in recognition of his outstanding contributions to science. The following is a photo of Obama and the 'good enough' professor when the medal was awarded. Year after year, the old man is 94 years old this year, and he is still struggling to be the front line of advanced lithium battery development. In any case, this kind of spiritual star is a five-body cast. At the same time, the team led by the father can be said to have frequent successes. The first is about the latest results of lithium-air batteries. Next is the research and development results of solid-state lithium-ion batteries mentioned at the beginning of the article. Although relevant research does not yet have mass production conditions, they are all very authoritative. For example, the research and development results of solid-state lithium-ion batteries were published in the core journal EES (Energyu0026EnvironmentalScience). First, give an example to introduce what is a solid-state lithium-ion battery. What is the difference between it and the current traditional lithium battery? The solid-state lithium-ion battery discards the liquid electrolyte of the traditional lithium battery and uses solid materials instead. Its most intuitive advantage is the substantial increase in energy density. And it solves the problem that the traditional lithium battery is easy to catch fire. The current close to mass production is SEEO's solid-state lithium battery solution acquired by Bosch BOSCH. Comparison of solid-state lithium-ion batteries with traditional lithium batteries. The special features of the research results of SEEO's solid-state lithium battery solution acquired by Bosch BOSCH can be summarized as follows: The positive electrode uses alkaline materials (elements include lithium Lithium, sodium Sodium, and potassium Potassium) The negative electrode uses a copper-carbon composite material Copper-Carbon electrolyte, which is composed of solid lithium glass and nano glass Li-glass and Na-glass electrolytes to form a double-layer electrolytic capacitor similar to a super capacitor. The specific structure and corresponding working principle of the electric-double-layer capacitor (EDLC) are as follows: The electric-double-layer capacitor (EDLC) structure inside the lithium-ion battery has the above structure. The new solid-state lithium-ion battery has the following advantages: 1. Low cost 2. All solid state 3. High energy density 4. Long cycle Lifetime 5. It can work at low temperatures. According to the data of the paper, the new solid-state lithium-ion battery is based on its all-solid-state structure, which solves the problem of dendrites (whiskers) produced by traditional liquid electrolytes during fast charging. Fundamentally prevent the internal short circuit of the lithium battery from catching fire. On the other hand, the space between the electrodes is reduced by the solid electrolyte material, thereby increasing the energy density and reducing the cost. The paper stated that its energy density can exceed at least three times that of current traditional lithium-ion batteries. On the other hand, through testing, the new solid-state lithium-ion battery can reach a long cycle life of 1200 cycles. And this is the first time this type of solid-state lithium-ion battery can work below 60 degrees. The general operating temperature of previous solid-state lithium-ion batteries was mostly between 60 and 120 degrees. The new solid-state lithium-ion battery can even work at an ambient temperature below 0 degrees.
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