期刊
CARBON
卷 127, 期 -, 页码 658-666出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2017.11.054
关键词
Rice husk; Hard carbon; Sodium-ion battery; Anode; Storage mechanism
资金
- National Natural Science Foundation of China [51577094, 21503112]
- Nanjing Normal University
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Program of Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
Sodium-ion batteries (SIBs) have drawn ever-increasing attention for scalable electrical energy storage owing to the inexhaustible sources and wide distribution of sodium. However, to develop feasible anode materials still remains a great challenge for the practical application of SIBs. Here, we report hard carbons derived from a plentiful and deserted biomass of rice husk through a facile acid treatment and subsequent pyrolysis. The investigation illustrates that the electrochemical properties of the rice husk-derived hard carbons (RHHCs) are significantly influenced by the pyrolysis temperature because of the discrepancy in their microstructure. The RHHC pyrolyzed at 1300 degrees C (RHHC-1300) shows the highest reversible capacity of 372 mAh g(-1) and good cycling stability and rate performance due to its large interlayer distance and suitable oxygen content. Moreover, full sodium-ion batteries are assembled to examine the application prospect using Na3V2(PO4)(2)F-3/C and RHHC-1300 as cathode and anode materials, respectively, delivering a high-energy density of 185 Wh kg(-1) and stable cycling performance. This work could intensify the fundamental understanding of the sodium storage mechanism in biomass-derived hard carbons. (C) 2017 Elsevier Ltd. All rights reserved.
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