Controlled synthesis of macroscopic three-dimensional hollow reticulate hard carbon as long-life anode materials for Na-ion batteries

JOURNAL OF ALLOYS AND COMPOUNDS

卷:716

Article

Li, Wenbin¹  Huang, Jianfeng¹  Feng, Liangliang¹  Cao, Liyun¹  Ren, Yijie¹  Li, Ruizi¹  Xu, Zhanwei¹  Li, Jiayin¹  Yao, Chunyan² 

[1] Shaanxi Univ Sci & Technol, Sch Mat Sci & Engn, Xian 710021, Shaanxi, Peoples R China

[2] Shaanxi Univ Sci & Technol, Culture & Commun Sch, Xian 710021, Shaanxi, Peoples R China

关键词: Macroscopic three-dimensional architecture;    Controlled synthesis;    Hard carbon;    Sodium ion batteries;    Long-life;   

DOI  :  10.1016/j.jallcom.2017.05.062

来源: Elsevier

【 摘 要 】

The controlled conversion of biomass is necessary for their efficient utilization. In this work, we report the controlled synthesis of a novel macroscopic three-dimensional hollow reticulate hard carbon by hydrothermal pretreatment and further low temperature (600 degrees C) pyrolysis method. The carbonization mechanism is presented based on differential thermal analysis, which shows that the hydrothermal pretreatment gets through the reticulate structure by removing flavonoids and the pyrolysis temperature is a key factor for inheriting the unique architecture. Tested against sodium, the hard carbon exhibits good cycling stability, showing capacity retention of 90% after 1000 cycles. The excellent Na-ion storage property is attributed to the interconnected three-dimensional architecture, the abundant O-containing functional groups and the large interlayer spacing. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free