Nickel Metal Hydride No. 5 battery

　　Introduction to the technical characteristics and technical trends of Nickel Metal Hydride No. 5 battery materials

　　The lithium-ion battery industry requires the integration of multiple technologies, including electrochemical technology, production technology, electronic technology, material development technology, etc. Lithium-ion batteries not only require continuous development in theory, but also have relatively high production requirements. It is necessary to rely on excellent equipment and factory conditions and high-quality technical workers to produce qualified lithium-ion batteries. Below, the editor of Xianji.com introduces the technical characteristics and technical trends of Nickel Metal Hydride No. 5 battery materials.

　　From the technical barriers of raw materials, the technical level of lithium-ion battery industry is diaphragm> positive electrode material> electrolyte> negative electrode material. However, the strategic core issue that has always hindered the industrial application of lithium-ion batteries is positive electrode materials. On the one hand, positive electrode materials account for the highest cost in lithium-ion batteries. Reducing the cost of positive electrode materials is conducive to the promotion and application of lithium-ion batteries. On the other hand, positive electrode materials are the decisive factor in the electrochemical function of lithium-ion batteries. At present, positive electrode materials cannot fully meet the large-scale application requirements in the field of low-cost electric vehicles and industrial energy storage.

　　Positive electrode materials are the most critical raw materials for lithium-ion batteries. Different positive electrode materials have their own advantages and disadvantages. According to the needs of low-end products, the types of positive electrode materials selected are different. The functional requirements of positive electrode materials for lithium-ion batteries in the field of consumer electronics focus on the energy density and safety of lithium-ion batteries. Lithium cobalt oxide is the main positive electrode material for lithium-ion batteries in current consumer electronics products; the functional requirements of positive electrode materials for power batteries are high voltage, high energy, high power and wide temperature range. Lithium iron phosphate, lithium manganese oxide and ternary materials are the main raw materials for positive electrode materials of current power lithium-ion batteries, among which ternary materials are the trend of positive electrode materials for future power batteries; in terms of power batteries, lithium titanate is a new development direction.

　　Technical characteristics and technical trends of Nickel Metal Hydride No. 5 battery materials

　　The technology and market of negative electrode materials are relatively mature, mainly carbon materials, and graphite negative electrode materials have a certain mainstream advantage in negative electrode materials. The rate function of conventional graphite negative electrode materials can no longer meet the needs of low-end products of lithium-ion batteries. In terms of consumer electronics, it is necessary to increase the energy density of batteries, and new high-capacity negative electrode materials represented by silicon-carbon (Si-C) composite materials are the future development trend.

　　The production technical barriers of diaphragms are the highest. The diaphragm materials on the market are mainly polyolefin diaphragms based on polyethylene (PE) and polypropylene (PP). The future development trend of the diaphragm industry is lighter and safer. With the rapid growth of lithium-ion batteries in consumer electronics, electric vehicles and other application areas, lithium-ion battery diaphragms must be laid out in advance for future market outbreaks, and breakthroughs in product performance and quality are required. The future development trend of diaphragms is to meet the functional requirements of high power, large capacity, long life cycle, safety and reliability.

　　The electrolyte is generally composed of high-purity organic solvents, electrolyte lithium salts, necessary additives and other materials. It is manufactured in a certain proportion under certain conditions. Among them, the electrolyte accounts for the largest proportion of the electrolyte cost and is also the link with the highest technical barriers in the electrolyte. It is currently mainly monopolized by Japan and South Korea. Lithium hexafluorophosphate is the main lithium-ion battery electrolyte in the current market. The localization level of lithium hexafluorophosphate in my country is increasing rapidly. The future development trend of electrolyte is to meet the functional requirements of high voltage, wide temperature range and higher safety.

　　From the perspective of current technical development, there are three major trends in Nickel Metal Hydride No. 5 battery material technology: (1) Development of large-capacity lithium-ion power batteries for electric vehicles; (2) Development and application of new high-performance electrode materials, especially the development of high-performance positive electrode materials; (3) Further reducing the cost of lithium-ion batteries and improving the safety function of batteries.

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