Morphology-controlled hydrothermal synthesis of acanthosphere FeCO3 as an excellent performance anode material for lithium ion batteries

作者：Feng, Xiaoyu; Shen, Qiang; Shi, Yuanchang; Zhang, Jianxin^*

来源：Ceramics International, 2016, 42(12): 14246-14251.

DOI：10.1016/j.ceramint.2016.06.052

• Lithium ion battery
• Anode material
• Ferrous carbonate
• Hydrothermal synthesis

A special acanthosphere shaped FeCO3 anode powder material was synthesized successfully through controlled hydrothermal method. It delivered an initial specific discharge-charge capacity of 2100/1087 mA h g(-1) at a current density of 100 mA g(-1), and exhibited a high discharge capacity of 238 mA h g(-1) even at a current of 10,000 mA g(-1). Furthermore, its capacity would return to the initial capacity level even if the discharge/charge current got back from 10,000 mA g(-1) to 100 mA g(-1). Galvanostatic intermittent titration technique (GITT) method was used to investigate the lithiation mechanism of FeCO3 electrode, and results showed that the lithium ion diffusion was driven by two step reactions, the first transition from FeCO3 to Fe and the second reduction of newly grated LiCO3, respectively. High diffusion coefficients of Li ions also give the reason for the high capacity under large rate charge-discharge condition.

• 出版日期2016-9
• 单位山东大学