NASICON-type air-stable and all-climate cathode for sodium-ion batteries with low cost and high-power density
NASICON-type air-stable and all-climate cathode for sodium-ion batteries with low cost and high-power density
复制标题
NASICON型低成本高功率密度钠离子电池空气稳定全气候正极
DOI：
10.1038/s41467-019-09170-5
复制
发表时间：
2019-04-01
影响因子：
16.6
通讯作者：
Dou, Shi-Xue
中科院分区：
文献类型：
--
作者：
Chen, Mingzhe;Hua, Weibo;Dou, Shi-Xue
开发低成本、长寿命的全气候钠离子电池正极材料是大规模储能成功的关键问题之一。一种选择是利用地球上丰富的元素，如铁。在这里，我们合成了NASICON型可调Na 4Fe 3（PO 4）2（P2 O 7）/C纳米复合材料，该材料在超过4400次循环中表现出优异的倍率性能和出色的循环稳定性。研究了其空气稳定性和全气候特性，并研究了其作为全电池钠宿主的潜力。观察到4.0%的非常低的体积变化。通过第一性原理计算，对其高钠扩散系数进行了测量和分析，并确定了其三维钠离子扩散路径。结果表明，这种低成本、环境友好的Na 4Fe 3（PO 4）2（P2 O 7）/C纳米复合材料有望成为钠离子电池的一种有竞争力的候选材料。
The development of low-cost and long-lasting all-climate cathode materials for the sodium ion battery has been one of the key issues for the success of large-scale energy storage. One option is the utilization of earth-abundant elements such as iron. Here, we synthesize a NASICON-type tuneable Na4Fe3(PO4)2(P2O7)/C nanocomposite which shows both excellent rate performance and outstanding cycling stability over more than 4400 cycles. Its air stability and all-climate properties are investigated, and its potential as the sodium host in full cells has been studied. A remarkably low volume change of 4.0% is observed. Its high sodium diffusion coefficient has been measured and analysed via first-principles calculations, and its three-dimensional sodium ion diffusion pathways are identified. Our results indicate that this low-cost and environmentally friendly Na4Fe3(PO4)2(P2O7)/C nanocomposite could be a competitive candidate material for sodium ion batteries.