Supported by the theme project “Research on Key Technologies of High-Performance Chemical Energy Storage Batteries and Demonstration Power Stations†in the “12th Five-Year Plan†Advanced Energy Technology Area, “High Specific Energy, Low-Cost New Supercapacitor Key Technologiesâ€, “Long Lifespan†Lithium manganate-based energy storage batteries, key technologies and demonstrations, and other topics have made significant progress, and recently passed technical acceptance.
According to the Ministry of Science and Technology official microblogging "Rui Technology" August 15, news, in the "new super capacitor", broke through the high energy density high power density long-life supercapacitor production technology bottleneck, developed a porous graphene, high pressure Electrolyte salts, electrolytes, cellulose separators, etc., have been developed as pilot methods for electrode preparation of dry-process electrodes and have broken through the core technology of (3.0V/12000F) supercapacitor industrialization. The products have been used in mechanical energy recovery and supercapacitor rail vehicles. Obtained applications at home and abroad. At present, China has formed a core technology system for supercapacitors from materials and devices to system integration, which has changed the situation of supercapacitors monopolized by foreign products during the 11th five-year period.
Lithium-manganese oxide, surface-coated single-crystal lithium manganate, aluminum-cobalt co-doped lithium manganese oxide cathode material, bitumen and resin-derived hard carbon negative electrode have been developed in terms of a "long-life lithium manganese oxide battery." The research of materials and functional electrolytes, and research of single cells, modules and energy storage systems, mastered the key technologies for industrialization of long-life low-cost lithium ion energy storage systems, and the life of the monomer has exceeded 3,000 times and reached a maximum of 6000 times. . In the world, it has for the first time developed and demonstrated the operation of two 50kW/100kWh layered lithium manganese oxide/hard-metal lithium-ion battery energy storage systems. At the same time, it has developed 20kWh household solar energy storage systems and 3kWh standby emergency power supplies. demonstration.
In the "all-solid-state lithium-ion energy storage battery", the high conductivity Li2S-P2S5 binary system and the Li2S-GeS2-P2S5 ternary solid electrolyte were successfully developed, and the preparation of the Li2S-P2S5 glass-ceramic solid electrolyte material was mastered. Methods, a major breakthrough has been made in the preparation of amorphous precursors, and a highly efficient and stable preparation has been achieved. Sulfide solid-state electrolytes have now achieved kilogram-level preparation capabilities. A layered cathode material with a high nickel composition with core-shell structure and composition gradient was developed. A solid state lithium battery with a capacity of 4.0 Ah and 8.0 Ah was developed using the above binary system of sulfide solid electrolyte and a positive electrode, and the number of cycles at room temperature reached 500, optimizing the assembly process of a large-scale all-solid-state soft-pack battery and advancing all-solid state Industrialization of lithium-ion batteries.
In the "new lithium-sulfur chemical energy storage battery", the development of high energy density lithium-sulfur battery manufacturing technology, developed 35Ah lithium-sulfur battery specific energy of 566Wh/kg (25 °C test), has reached the world's leading level. A 1kWh lithium-sulfur battery pack and a 12kWh large-capacity lithium-sulfur battery pack have been initially developed to achieve demonstrations of their coupled solar cell power generation. The technology products of large-capacity lithium-sulfur batteries and battery packs using elemental sulfur have the potential to be used in the field of long-haul UAVs on-board energy systems, and have broad application prospects.
In addition, in the area of ​​"low-cost lithium titanate-based energy storage lithium-ion batteries," lithium-titanate-based lithium titanate series was established through mass production of low-cost materials, long-life high-consistency batteries and modules, demonstration of power plants, and promotion of the entire industrial chain. A mobile energy storage demonstration device for anode materials was used for demonstration of optical storage of a 0.5 MWh/1 MW lithium titanate battery energy storage station, which laid the foundation for the application of lithium titanate storage energy.
The implementation of this project has met the large-scale energy storage needs of renewable energy and smart grid to a certain extent, promoted the orderly development of wind energy and solar energy and rational allocation of resources, and improved the level of grid-connected technologies for intermittent new energy sources. It provides a relatively complete technical support system for China's energy storage battery material-battery-integration-demonstration industrial chain, and builds an internationally competitive industrialization platform for the sustainable development of the industry in the future, and promotes the development of China's energy storage industry. It has enhanced the strategic status of China's energy sustainable development and has a broad market prospect.
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