The technology and market of anode materials are relatively outdated, and primary carbon materials and graphite anode materials are bound to have the mainstream advantage in terms of negative electrode funding speculation. The multiplier function of traditional graphite anode materials is difficult to meet the requirements of lithium-ion batteries. In the field of consumer electronics, to increase the energy density of batteries, new high-capacity cathode materials represented by silicon-carbon (si-c) composite materials are the future development trend.
The barriers to diaphragm production are the highest. The most important diaphragm materials on the market are polyethylene (PE) and polypropylene (PP)-based polyolefin diaphragms. The future development trend of diaphragm career is thinner and safer. With the rapid rise in the application of lithium-ion batteries in consumer electronics, electric vehicles and other categories, the future storage layout, before the explosion of lithium-ion battery separators, the demand for product functions and quality breakthroughs, the future trend of separators is to satisfy high power, large capacity, Long life cycle, safe and reliable function requirements.
The electrolyte is usually composed of high-purity organic solvents, electrolyte lithium salts, necessary additives and other materials.Under certain conditions, according to a certain manufacturing industry, the electrolyte has the largest proportion of the electrolyte cost and the highest technical barrier. Links are now monopolized by Japan and South Korea. Lithium hexafluorophosphate is the most important lithium-ion battery electrolyte on the market. The future development trend of electrolyte is to meet the requirements of high voltage, wide temperature range and high safety.
At present, from the perspective of technological development, there are three major development trends in lithium-ion battery material technology: (1) the development of large-capacity lithium-ion power lithium batteries for electric vehicles; (2) the development and application of new high-functional electrode materials, especially Development of high-functional anode materials; (3) Further reduce the cost of lithium-ion batteries and improve battery safety
Research progress of solid-state lithium-ion batteries
Since being put on the market in 1991, lithium-ion batteries have attracted attention because of their high energy density and long life. It has become an integral part of the energy economy in the 21st century. However, the application of lithium-ion batteries in large-scale battery fields such as automobiles and energy storage still has some safety problems that need to be solved urgently. The organic electrolyte of lithium-ion batteries is volatile, flammable and explosive.  All-solid-state lithium-ion batteries have fundamentally solved this problem, and have the advantages of large capacity and light weight. The research on the industrialization of all-solid-state lithium-ion batteries is urgent.
1. Overview of all solid lithium ion batteries
All-solid-state lithium-ion batteries are related to liquid lithium-ion batteries. They refer to energy devices that contain no liquid in the structure and all data are stored in solid state. Specifically, it is composed of positive electrode data + negative electrode data and electrolyte, while a liquid lithium ion battery is composed of positive electrode data + negative electrode data + electrolyte and separator.