碳化
材料科学
阳极
可再生能源
微观结构
钠
化学工程
碳纤维
电化学
纳米技术
复合材料
冶金
电极
电气工程
扫描电子显微镜
复合数
工程类
物理化学
化学
作者
Yunming Li,Yong‐Sheng Hu,Maria‐Magdalena Titirici,Liquan Chen,Xuejie Huang
标识
DOI:10.1002/aenm.201600659
摘要
Sodium‐ion batteries (SIBs) have attracted more and more attention for scalable electrical energy storage due to the abundance and wide distribution of Na resources. However, the anode still remains a great challenge for the application of SIBs. Here the production of uniform hard carbon microtubes (HCTs) made from natural cotton through one simple carbonization process and their application as an anode are reported. The study shows that the electrochemical performance of the HCTs is seriously affected by the carbonization temperature due to the difference in their microstructure and heteroatomic content. The HCTs carbonized at 1300 °C deliver the highest reversible capacity of 315 mAh g −1 and good rate capability due to their unique tubular structure. This contribution not only provides a new approach for the preparation of hard carbon materials with unique tubular microstructure using natural inspiration, but it also deepens the fundamental understanding of the sodium storage mechanism.
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