Ultra long SrLi2Ti6O14 nanowires composed of single-crystalline nanoparticles: Promising candidates for high-power lithium ions batteries

作者：Li Hongsen; Shen Laifa; Ding Bing; Pang Gang; Dou Hui; Zhang Xiaogang^*

来源：Nano Energy, 2015, 13: 18-27.

DOI：10.1016/j.nanoen.2015.02.002

• Lithium ion batteries
• Anode materials
• SrLi2TiO6O14
• Nanowires
• High power

To deploy Li-ion batteries for large scale application, it is essential to develop durable electrodes with high power and energy density. Here, we demonstrate that ultralong SrLi2Ti6O14 nanowires anode materials synthesized by a simple electrospinning technique are capable of excellent high-rate performance with long stability. The SrLi2Ti6O14 nanowires composed of single-crystalline nanoparticles possess the features of "nano-bead-chain" architecture. Used as anode material for lithium ions batteries, the novel SrLi2TiO14 nanowires exhibits a high reversible capacity of 171.4 mA h g(-1) at 0.1 C and retains 96.2 mA h g(-1) even at high rate of 20 C. In addition, the capacity is able to stabilize at 101 mA h g after 1000 cycles, corresponding to 0.0086% capacity fading per cycle. Importantly, the Li-storage mechanism of Li2SrTi6O14 was revealed by X-ray photoelectron spectroscopy (XPS) and X-ray absorption near edge structure (XANES). The greatly improved electrochemical performance arises from the favorable kinetics properties stemming from unique nanoparticle-in-nanowire one-dimensional architecture.

• 出版日期2015-4
• 单位南京航空航天大学