Lithium-rich manganese based battery materials should be paid more attention

With the rapid development of our economy, increasing demand for new battery materials, coupled with strong demand for new, efficient and environmentally friendly battery materials for mobile phones, laptops, digital cameras, cameras, automobiles and other products, the market for new battery materials in our country will continue to expand. Lithium battery as the future development direction of batteries, its positive material market development prospects are promising. At the same time, the large-scale commercialization of new energy vehicles will bring new opportunities for lithium battery cathode materials.

In lithium batteries, lithium batteries composed of cathode materials, negative electrode materials, membranes, and electrolytes account for 40 % of the total cost of batteries. The most important thing is that the battery's energy density, cycle performance, and multiplier properties mainly depend on the positive electrode material. The performance of the positive electrode material directly affects the performance of the battery, and its core position in the battery material is unshakable.

At the "OFweek 2018(2nd) China Power(600482) Lithium Battery Technology and Application Seminar" held recently, Associate Professor Zhaoshixi of the Shenzhen Graduate School of Tsinghua University delivered a speech on "Research Progress in Lithium Battery Positive Material Selection and Technology" at the seminar. The latest developments in the selection and technical research of battery cathode materials were shared with the industry.

Positive material reform is imminent

At the seminar, Professor Zhaoshixi said that the current "mileage anxiety" is the key problem that hinders the development of electric vehicles. The energy density of batteries determines the maximum mileage of electric vehicles to a large extent.

At present, the energy density level of lithium-ion battery technology is about 100-150Wh / kg. If the single mileage of an electric car is to reach 500 kilometers equivalent to that of a conventional fuel truck, the energy density of the battery monomer must reach 300 Wh/kg or more. If you want to reach the energy density index of 250 Wh/kg or even 300 Wh/kg by 2020, the current commercially applied positive material can not be achieved. Then the positive material needs a relatively large technological change, and the choice of positive material becomes a very urgent problem.

In recent years, lithium battery-related policies have been introduced to promote the establishment of upstream and downstream enterprises in the industry. The lithium battery positive electrode materials that have been commercialized include lithium cobalt acid, lithium manganese acid, lithium iron phosphate and ternary materials. Zhaoshixi believes that although lithium battery positive material has a wide market, the outlook is very optimistic. However, there are still some technical bottlenecks in lithium battery positive electrode materials, especially its advantages of high capacity and strong safety performance have not yet been fully utilized.

In fact, in the field of lithium battery cathode materials, any small technological innovation is likely to set off a new round of market expansion, and Chinese enterprises should step up research and development of key technologies for cathode materials, achieve international leadership and enhance core competitiveness. Take advantage of international competition.

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