(I) New Cathode Materials: Through breakthroughs in key technologies such as the synthesis of cobalt-nickel-manganese hydroxide precursors, lithium iron phosphate nano-sizing, iron site doping of lithium iron phosphate, carbon coating of lithium iron phosphate, and surface layer modification of lithium manganese oxide, low-cobalt, high-capacity ternary cathode materials (lithium cobalt-nickel-manganese oxide), lithium iron phosphate cathode materials, and modified lithium manganese oxide cathode materials have been successfully applied to high-energy-density small lithium-ion batteries for mobile electronic terminal devices, high-power small batteries for power tools, small power lithium-ion batteries for light electric vehicles, and lithium-ion power lithium-ion batteries for new energy vehicles. These breakthroughs in new cathode material technology have laid a solid foundation for the development of my country's small lithium-ion battery industry and power lithium-ion battery industry. The annual production capacity of new cathode materials has reached 50,000 tons, not only meeting the needs of domestic battery companies but also making China an important supplier in the international market.
(II) Novel Anode Materials: With high-capacity, high-power nanocomposite anode materials as a key research and development goal, in-situ composite nano-micro composite anode materials have been developed by utilizing the nanoscale effect of materials. These materials achieve a capacity of 600 mAh/g, approximately 1.8 times that of existing commercially available anode materials, and exhibit less than 20% capacity decay after 500 cycles. When used to assemble 35Ah high-power batteries, the power density reaches 1500 W/kg, and the energy density of 18650 and 3450 type batteries reaches 238 Wh/kg, demonstrating excellent cycle performance. A production line with an annual output of 110 tons of high-performance anode materials has been established, including 20 tons of carbon nanotubes/carbon nanofibers, 60 tons of nanoporous hard carbon spheres, and 30 tons of glutinous rice structure anodes.
(III) Breakthroughs in novel electrolyte and separator materials: Significant breakthroughs have been achieved in the synthesis and purification processes of next-generation lithium salt-bis(fluorosulfonylimide) lithium conductive materials for power lithium-ion batteries. Low-viscosity ionic liquid electrolyte materials for secondary lithium (ion) batteries have been developed, making my country the second country, after Japan, to successfully master this material preparation technology. Lithium hexafluorophosphate electrolyte lithium salt production technology has been mastered, establishing a demonstration production capacity of thousands of tons/year of lithium hexafluorophosphate, achieving large-scale production. Single-layer separator technology has been successfully industrialized and applied in batches to mobile phone batteries, breaking the monopoly of a few countries. Preliminary breakthroughs have also been made in composite separator technology. These breakthroughs in novel electrolyte and separator materials have solved my country's long-standing reliance on imports and can strongly promote the steady and healthy development of my country's power lithium-ion battery, electric vehicle, and other related industries.
