Thread Content
Currently, breakthroughs are being made in the cutting-edge research and application areas of sodium-ion batteries. It was learned at the 4th China Sodium Battery Technology Summit Forum, held on April 23 by Lithium Battery Frontier, that as the technology matures, sodium-ion batteries are expected to be widely used in low-speed electric vehicles, distributed energy storage, and large-scale energy storage applications, thanks to their advantages of abundant resources, low cost, and high cost-performance ratio. Compared to lithium batteries, sodium batteries offer advantages such as lower costs, excellent performance at low temperatures, high safety, fast charging capabilities, and a long cycle life. However, they also have significant drawbacks, including low energy density, relatively higher self-discharge, and manufacturing technologies that are still under development. Chinese researchers have made breakthroughs in various technical fields, with some of these technologies already entering the stage of practical application testing. Data shows that the NFPP (polyanion) route is by far the dominant approach for cathode materials in sodium batteries, accounting for over 70% of the total production of such cathodes. Wang Yaping, an associate professor at Jiangsu University, believes that cathode materials are crucial for sodium-ion batteries. Among them, polyanions perform the best, offering advantages such as optimal cycling performance, excellent performance at low temperatures, and high safety. They are thus the preferred choice for energy storage sodium batteries. The project for developing polyanion cathode materials for 50,000-ton sodium-ion batteries, developed by their team, is currently in the stage of site selection and construction. Once this project is completed, cathode materials for sodium-ion batteries will see a significant improvement, entering a phase of large-scale production. Han Fei, an associate professor at Hunan University, explained that among the negative material options for sodium batteries, hard carbon boasts a high reversible specific capacity, excellent cycle performance, and a low sodium storage potential; it is therefore the best choice for negative materials in the commercial application of sodium batteries, and is likely to be the first to be put into industrial use. However, the structural analysis of hard carbon materials, the sodium storage mechanism, performance improvement, and cost reduction are key issues that need to be addressed. To address issues such as the low energy density of sodium batteries, Chen Peng, general manager of Jiaxing Changgao New Materials Technology Co., Ltd., highlighted the ultra-thin sodium strips developed by his team. These strips can be used as sodium-supplementing materials for the anodes of sodium-ion batteries, helping to overcome the problem of low initial efficiency; by increasing this efficiency from 75% to over 95%, the energy density of sodium-ion batteries can be significantly improved. Recently, the team led by Hu Yongsheng from the Institute of Physics, Chinese Academy of Sciences, published a significant achievement in Nature Energy, achieving complete prevention of thermal runaway in ampere-hour-grade sodium-ion batteries for the first time in the world, which has drawn attention from the industry. Is the maturity of sodium battery technology just around the corner? Sun Hao, General Manager of GuoNa Energy Technology (Hebei) Co., Ltd., predicts that by 2030, the demand for sodium batteries will reach 168 GWh, and the sodium battery market will become a multi-billion-dollar industry. Energy storage is set to become the main application market for sodium-ion batteries, with huge market potential; especially in terms of frequency regulation in large-scale energy storage stations, sodium-ion batteries will hold a competitive advantage. Experts attending the meeting said that, against the backdrop of the \"dual carbon\" policy, energy and chemical enterprises should actively explore carbon-reduction technologies and their applications; sodium-ion battery storage could serve as an \"ideal solution\" for high-energy-consuming enterprises.