The reporter learned from the Keda Coal Chemistry Research Institute on the 15th that a special carbon anode material for high-capacity high-density lithium batteries with pure carbon as the main component was introduced in the hospital. At present, a new electric vehicle lithium battery based on this material has been Established a trial production in Chengdu Nanguang New Energy Company.
It is understood that in the power system of new energy electric vehicles, the capacity of lithium batteries (ie, the energy density of battery cells) depends entirely on the composition of the lithium ion battery anode material. China's first new energy vehicle lithium battery inventor, Chengdu Dr. Liu Changguo, chief engineer of Nanguang New Energy Co., Ltd., said that since the localization of lithium batteries, the negative electrode materials have always used natural graphite as the main component, and the technical bottlenecks such as long charging time and low monomer density density have made it difficult for China's new energy vehicles to maintain their mileage. Breaking the limit of 300 kilometers. From the experimental data and product performance test, this kind of lithium battery prepared by the new material can achieve a cruising range of 600 kilometers.
Technical inventor, He Feng, general manager of Yulin Keda Coal Chemistry Research Institute Co., Ltd. introduced that the energy storage materials of new single cells have abandoned traditional natural graphite in research and development, and made pure carbon by physical and chemical methods. High-density lithium battery anode material.
Experiments show that the new negative electrode material has a gram capacity of 2200 mAh/g, and the negative electrode sheet has a compaction density of more than 2.0 g/cm3. It is equipped with a ternary material for positive electrode and lithium cobalt oxide. The mass energy density of the lithium battery can exceed 350 Wh/ Kg. 'In addition, lithium battery charging time based on new materials does not exceed 15 minutes, which is beyond the reach of traditional batteries. After testing, the new material battery is always at room temperature during charging and use. 'He Feng said.
Liu Changguo said that experts in the field of new energy power batteries in China have expressed concern about whether the domestic lithium battery can achieve a monomer energy density of 350Wh/kg in 2020, and the new battery being tested has surpassed this goal.
