According to a report on August 7th, researchers from Tokyo Institute of Technology and other institutions have developed ultra-high-speed batteries that can be super-high-speed charge and discharge, making a big step toward the practical application of all-solid-state batteries.
It is reported that overseas Panasonic, Samsung, and other domestic battery industries such as Ningde era, Yan Weilong, and Yanfeng Lithium are actively responding to the call of solid-state batteries and making breakthroughs, as shown in the following figure:
Prospect analysis of domestic solid-state, semi-solid batteries
Yu Huigen, a professor-level senior instructor at the Institute of Physics of the Chinese Academy of Sciences, said that at present, there are more developed solid-state batteries based on PEO polymers in Europe and America. There are more mixed solid-liquid battery companies in the United States, including in Japan, China, and Asia. South Korea, etc., mainly based on oxides and sulfides, in the promotion of related work.
Takao Asami, vice president of advanced engineering research at Nissan, said in an interview that although all solid-state batteries do perform well in the laboratory, they are bigger and put into cars, and they are still not guaranteed in terms of mileage, safety and cost. Technically, more breakthroughs are needed. He believes: 'All solid-state batteries are still in the initial stage of research. And my feeling is that it is in the zero stage, and it will not be deployed until the middle of 2020.
It is reported that the first batch of semi-solid lithium batteries of the US 'Solid Energy System' has been unveiled. These semi-solid lithium batteries are a substitute for traditional lithium-ion batteries, which are safer, but cheaper than lithium polymer batteries. It is planned to be applied to drones at the end of the year, to the field of wearable devices in 2019, and to electric vehicles in 2021.
It can be seen that most battery companies are pursuing the development of solid-state batteries, first speeding up the development of semi-solid battery products.
Solid-state / semi-solid battery summary
'Class solid-state batteries and solid-state batteries, although only one word, but the material system is very different.' Industry insiders said that the two research and development ideas are the same, but the gap is vastly different.
Professor Yu Huigen explained it plainly and easily: The semi-solid lithium battery is any electrode in the battery as long as it does not contain electrolyte. The battery without liquid in the battery cell is called an all-solid lithium battery.
The industry has great expectations for all-solid-state batteries, believing that it is 'sole' to prevent the SEI film from continuing to grow, the aluminum foil is corroded, and that researchers are no longer afraid of low-temperature over-excitation of lithium, lithium dendritic short-circuit; no longer worried Free transition metal, transition metal dissolution, positive electrode oxygen evolution, liquid leakage, thermal runaway, high temperature storage and operation; realize that the negative electrode can contain lithium, the positive electrode can be charged with high voltage, and no longer explode.
Christopher Richter, automotive analyst at CLSA in France, said: 'At present, the cost of comparable gold has become a barrier to the commercialization of solid-state batteries.'
It is reported that solid-state batteries face obstacles such as cost and production difficulty. They will not be scaled up by 2025, but they are far away from cars. But in the future, the semi-solids are now mass-produced. Will solid-state batteries be far behind?
