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Home> Articles>News>Sodium Ion Batteries? — High Energy 33.5Ah Secondary Lithium Ion Battery Pack

Sodium Ion Batteries? — High Energy 33.5Ah Secondary Lithium Ion Battery Pack

From:CTECHI GROUP Limited     Release time:2018-12-12

Overview:The application of lithium-ion batteries is more and more close to people's lives, but the lithium resources on the earth are very limited and the cost of exploitation is high. The development of an alternative battery has become an important direction for scientists all over the world. Professor Xia Hui of Nanjing University of Technology, in collaboration with Chinese and foreign teams, pioneered structural design and control methods, and made important progress in the research of manganese-based cathode materials. It is expected that low-cost sodium-ion batteries will replace lithium-ion batteries. Relevant results are published in the latest issue of Nature Communications.

The application of lithium-ion batteries is more and more close to people's lives, but the lithium resources on the earth are very limited and the cost of exploitation is high. The development of an alternative battery has become an important direction for scientists all over the world. Professor Xia Hui of Nanjing University of Technology, in collaboration with Chinese and foreign teams, pioneered structural design and control methods, and made important progress in the research of manganese-based cathode materials. It is expected that low-cost sodium-ion batteries will replace lithium-ion batteries. Relevant results are published in the latest issue of Nature Communications.


Sodium resources are abundant and the cost of exploitation is only 1% of lithium, so the research and development of sodium ion batteries has become a field for scientific researchers to scramble for "reclamation". Layered sodium manganate cathode materials have many advantages, such as high theoretical capacity, low price and wide sources, which make them a hot research object of sodium ion battery cathode materials.


However, due to the narrow interlayer spacing of the sodium manganate cathode material, the structure of the cathode material will be "extruded" when the larger radius sodium ions migrate between layers during the charging and discharging process, which becomes the key difficulty restricting the development of sodium ion batteries. In addition to the interlayer spacing, another important factor affecting the performance of sodium ion batteries is the content of sodium ions in the layered structure. Many researchers have tried to prepare different layered sodium manganate by various methods, but the performance index can not meet the practical application requirements.

High Energy 33.5Ah Secondary Lithium Ion Battery Pack

Professor Xia Hui's team pioneered structural design and control methods. In cooperation with Gulin Researcher, Institute of Physics, Chinese Academy of Sciences, and Professor Meng Ying, University of California, San Diego, USA, layered nanocathode materials with large spacing and high sodium ion content were successfully prepared on the basis of layered structure of sodium manganese ore.


The specific capacity of the cathode material reaches 211.9 mA/g, while the current market capacity of the cathode material for lithium batteries is about 140 mA/g. During the charging and discharging process, the structure of the cathode material is stable and has no phase change. The volume change is only 2%. After 1000 cycles of charging and discharging, the specific capacity retention rate reaches 94.6%. The general standard of specific capacity retention rate in battery industry is about 80%.


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