Manganese-based cathode materials have made important progress, sodium-ion batteries are expected to replace lithium-ion batteries

According to the Science and Technology Daily, the use of lithium-ion batteries is getting closer to people's lives, but lithium resources on the earth are very limited and the mining costs are high. The development of an alternative battery has become an important direction for scientists from all over the world. Professor Xia Hui from Nanjing University of Science and Technology collaborated with Chinese and foreign teams to pioneer structural design and control methods, and made important progress in the research of manganese-based cathode materials, so that low-cost sodium-ion batteries are expected to replace lithium-ion batteries. The relevant results were published in the latest issue of 'Nature · Newsletter. Sodium resources are abundant, and the cost of mining is only one percent of lithium. Therefore, the research and development of sodium-ion batteries has become a field of scientific research. The layered structure of sodium manganate cathode material has the advantages of high theoretical capacity, low price and wide range of sources, making it a popular research object for sodium ion battery cathode materials. However, due to the narrow interlayer spacing of sodium manganate cathode materials, the structure of the cathode material will be 'squeezed' when sodium ions with a larger radius migrate between layers during charge and discharge, which has become a key difficulty restricting the development of sodium ion batteries. In addition to the layer spacing, another important factor affecting the performance of sodium ion batteries is the sodium ion content in the layered structure. Many researchers have tried various methods to prepare sodium manganate with different layered structures, but the performance indicators are difficult to meet the actual needs of use. Professor Xia Hui’s team pioneered structural design and control methods, and cooperated with researcher Gu Lin from the Institute of Physics of the Chinese Academy of Sciences and Professor Meng Ying from the University of California, San Diego. Layered nanometer cathode material with sodium ion content. The specific capacity of the electrode made of this cathode material reaches 211.9 mAh per gram, while the specific capacity of the current circulating lithium-ion battery cathode materials is about 140 mAh per gram. During the charging and discharging process, the structure of this positive electrode material is stable without phase change, and the volume change is only 2%. After 1000 cycles of charging and discharging, the specific capacity retention rate is as high as 94.6%, while the general specific capacity retention rate standard in the battery industry is about Is 80%. Technology Zone Manganese-based cathode materials have made important progress. Sodium-ion batteries are expected to replace lithium-ion batteries. Renyue launches two TWS Bluetooth headsets dedicated pCbA modules for wireless charging boxes. GaN power devices market trending. Infineon’s new method details expose Apple’s 18WUSb-C power What problems does the USbType-C power supply design face?