After five years of hard work, the nano-lead special 'all solid-state battery' project led by the Ningbo Institute of Materials Technology and Engineering of the Chinese Academy of Sciences has passed the acceptance test. According to reports, this technological breakthrough will further promote the scale application of domestic all-solid lithium batteries. It is expected to make new energy vehicles last longer and safer.
It is understood that the current industrialized power battery, usually a liquid battery, uses liquid materials as electrolytes.
All solid-state batteries, as the name suggests, use solid materials as electrolytes. Related electrolyte materials generally have three major categories: polymers, oxides and sulfides.
Compared with traditional lithium-ion batteries, all-solid-state batteries have obvious advantages. At the same energy, solid electrolytes are used to replace electrolytes and thin films. All solid-state batteries are thinner and smaller. In addition, all solid-state batteries are light, high in energy density, and used. After the all-solid electrolyte, the applicable material system of the lithium ion battery will also change. Metal lithium can be used as the negative electrode instead of the graphite negative electrode, which can obviously reduce the weight of the negative electrode material and significantly increase the energy density of the whole battery.
In addition, the use of all solid-state batteries can solve the compatibility problems of many new high-performance electrode materials with existing electrolyte systems.
The all-solid-state battery replaces the organic electrolyte with an inorganic solid electrolyte. In addition to improving the energy density of the battery, it also helps to improve battery safety and cycle life.
The project of Nano-Leader Special 'All Solid-State Battery' was led by Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences. The participating units include the Institute of Physics of the Chinese Academy of Sciences and the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences.
The team has developed a series of high-performance solid electrolyte materials, based on in-situ solid-state hybrid solid-liquid electrolyte cells and all-solid-state lithium battery cells, breaking through the related technologies from material development to battery integration.
Previously, solid-state batteries faced some practical difficulties in the process of industrialization. For example, the compatibility of metallic lithium with solid electrolytes was poor, which affected the performance of metallic lithium anode materials. Now, this scientific and technological achievement has stepped out of the laboratory and entered the ' Industry door'.
At present, many countries around the world are laying out all-solid-state battery technology research and development, and strive to seize the opportunities in the future lithium battery market competition. Toyota, Honda, Nissan, Panasonic and other 23 Japanese cars, batteries and materials companies and Kyoto University and 15 academic institutions including the Japan Institute of Physical Chemistry announced that it will spend 10 billion yen to jointly develop the next-generation electric vehicle all-solid lithium battery.
In addition, Samsung, Daisen, Mercedes-Benz and other industrial giants have also been involved in the development of solid-state batteries.
On the basis of the nano-leading special 'all solid-state battery' project, Jiangxi Haofeng Lithium Industry Co., Ltd. invested 500 million yuan in Ningbo to build a watt-hour solid-state power lithium battery production line, and launched the first generation of products in new energy vehicle users. Promotion and market launch.
The announcement issued by Lifeng Lithium in December last year showed that the newly established Ningbo company will focus on solid-state lithium battery core materials, high-performance solid-state lithium battery cells and modules for complete process development and product upgrade technology development. The project construction period is 2 years. Construction of a first-generation solid-state lithium battery R&D pilot production line with an annual output of 10,000 watts.
In addition, the Institute of Physics of the Chinese Academy of Sciences also cooperated with Beijing Weilan New Energy Technology Co., Ltd. to establish Jiangsu Weilan New Energy Battery Co., Ltd. in Fuyang, Jiangsu Province, and is constructing a battery pilot line.
'The international competition is very fierce. At this stage, China has ranked the world's first echelon in the overall competitiveness of power battery technology and industry. 'The relevant person in charge of Ningbo Materials said that the implementation of this topic, for the development of China's new high The safety and long-life power battery technology has laid a solid scientific and technical foundation, and has a profound impact on the early realization of the scale application of domestic all-solid lithium batteries.
