At present, the development of electric vehicles attracted attention, the industry for the future prospects of new energy vehicles have high hopes. As the core components of the battery, choose what kind of positive and negative materials are also controversial. Recently held by the Chinese electric car 100 people will be 2017 Forum, the Chinese Academy of Sciences researcher Li Hong told reporters that all solid-state metal lithium battery should be the future direction of the development of electric vehicles battery is expected all solid-state batteries in 2020 to 2025 The first to enter the market, but there are still a lot of basic research needs to break through.
Chinese Academy of Sciences Li Hong: all solid-state battery is expected to enter the market by 2020 to 2025
Recently, the three governments of China, Japan and the United States have put forward the development goals of power battery, the energy density of the battery is getting higher and higher, also put forward the corresponding development indicators, "but how to achieve ultra-high energy density indicators at the same time, Taking into account the use of power battery security, life, cost, which is all R & D personnel must consider the issue, "Li Hong said.
Currently, lithium-ion batteries provide a lightweight energy storage solution. Scientists generally believe that in this battery, the use of solid electrolytes instead of conventional liquid electrolytes can have significant advantages, which is commonly referred to as all solid-state lithium-ion battery. In 2016, the US Department of Energy provided a $ 19.7 million financial grant to the Automotive Technology Office to support the research and development of advanced automotive technology, which was used to support the development of solid electrolytes. In China, there are a lot of solid-state battery research and development team, there are many companies are also involved in them.
However, from a global perspective, all solid-state lithium battery is still in the laboratory stage. Li Hong believes that, in general, the current all-solid lithium battery development is facing the integration of electrolyte and positive and negative materials, lithium ion conductivity is low, metal lithium electrode volume changes and other aspects of the challenges need to be addressed.
In 2013, the Chinese Academy of Sciences decided to start the relevant "pilot special", proposed to do a long battery life battery, by increasing the energy density to extend the electric vehicle driving range. Chinese Academy of Sciences Institute of Physics, Chinese Academy of Sciences Institute of Chemistry, Chinese Academy of Sciences, Ningbo Institute of Materials, Chinese Academy of Sciences Changchun should be the Institute of Chinese Academy of Sciences Shanghai Institute of silicate and other 12 scientific research units common research, has also made some progress, with a lot of breakthroughs.
"In the long run, we should improve the safety of the pursuit of all solid-state lithium metal, and gradually increase the solid electrolyte and negative lithium content in the current Chinese Academy of Sciences is doing further development in this regard, trying to take into account the advantages of all solid lithium batteries and liquid lithium The advantages of the battery, hoping to learn from each other, and gradually improve the existing battery technology, "Li Hong introduced in the world, is expected to all solid-state batteries around 2020 to achieve small quantities of mass production, with the progress of technology Gradually into the market, "of course it may first meet the application of other areas, and other indicators after the standard, and then enter the field of power batteries."
Li Hong also pointed out that although the whole solid-state battery is expected in 2020 to 2025 the first to enter the market, but in the process, there are a lot of basic research and research technology is still a breakthrough, "from the comprehensive indicators, The current research is far from being able to meet the technical requirements of power batteries, we hope to move forward step by step, and gradually improve the existing lithium battery energy density and safety challenges. "