The lithium battery prepared by the new material can achieve a cruising range of 600 kilometers

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 officially trial-produced 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 anode materials of lithium ion batteries. Dr. Changguo Liu, the inventor of the first new energy vehicle lithium battery in China and the chief engineer of Chengdu Nanguang New Energy Co., Ltd., said that since the localization of lithium batteries, the anode material has been based on natural graphite, with long charging time and low monomer density. The technical bottleneck has made it difficult for China's new energy vehicles to reach the 300km limit. From the experimental data and product performance test, this lithium battery prepared from a new material can achieve a cruising range of 600 kilometers.

Feng He, the inventor of the technology and the general manager of Yulin Keda Coal Chemical Research Institute Co., Ltd., said that the energy storage materials of the new single cells have abandoned traditional natural graphite in research and development, and made pure carbon by physical and chemical methods and high-density lithium battery anode material.

Experiments show that the new negative electrode material has a gram capacity of 2200mAh/g, and the negative electrode plate has a compaction density of more than 2.0 g/cm3. It is matched 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, the charging time of lithium batteries based on new materials is no more than 15 minutes, which is beyond the reach of traditional batteries. After testing, the temperature of the new material battery is always normal during charging and use.” Feng He said.

Changguo Liu said that experts in the field of domestic new energy power batteries have expressed concern that domestic lithium batteries can achieve a monomer energy density of 350Wh/kg in 2020, and the new batteries being tested have surpassed this goal.

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