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PNb9O25 nanofiber as a high-voltage anode material for advanced lithium ions batteries
Journal of Materiomics ( IF 9.4 ) Pub Date : 2020-07-14 , DOI: 10.1016/j.jmat.2020.07.003
Haoxiang Yu , Jundong Zhang , Maoting Xia , Chenchen Deng , Xikun Zhang , Runtian Zheng , Shi Chen , Jie Shu , Zhen-Bo Wang

If the operating voltage of anode materials is below 1.0 V versus Li+/Li, the side reaction between electrolyte and anode materials will occur extensively. Thus, high-voltage anode materials have aroused interest recently. In this work, we report the preparation of PNb9O25 nanofiber via a facile electrospinning method. The PNb9O25 nanofiber shows the high rate performance and excellent cycling performance when it is used as anode in lithium ions batteries. For instance, the PNb9O25 nanofiber can deliver a capacity of 233, 212.1, 193.8, and 181.4 mA h g−1 at 0.2, 1, 3, and 6C, respectively. After 1000 cycles, it can reach at 134.3 mA h g−1 with capacity retention of 70.9%. Meanwhile, the ex situ X-ray photoelectron spectroscopy technique has been adopted to investigate the evolution in valence state of each element for PNb9O25 nanofiber. In addition, the PNb9O25 nanofiber is chosen as the anode material in lithium ion full cell in this work, demonstrating the potential for practical application.



中文翻译:

PNb 9 O 25纳米纤维作为高级锂离子电池的高压阳极材料

如果负极材料的工作电压相对于Li + / Li低于1.0 V ,则电解质和负极材料之间的副反应将广泛发生。因此,近来引起了高压阳极材料的关注。在这项工作中,我们报告了通过简便的静电纺丝方法制备PNb 9 O 25纳米纤维。PNb 9 O 25纳米纤维用作锂离子电池的负极时,显示出高倍率性能和出色的循环性能。例如,PNb 9 O 25纳米纤维可以提供233、212.1、193.8和181.4 mA hg -1的容量分别为0.2、1、3和6C。在1000次循环后,它可以达到134.3 mA hg -1,容量保持率为70.9%。同时,采用异位X射线光电子能谱技术研究了PNb 9 O 25纳米纤维各元素价态的演变。此外,在这项工作中,PNb 9 O 25纳米纤维被选作锂离子全电池的负极材料,证明了其实际应用的潜力。

更新日期:2020-07-14
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