介孔 Fe₃O₄@C 微胶囊的制备及其储锂性能。

Preparation and lithium storage performances of mesoporous Fe₃O₄@C microcapsules.

机构信息

Institute of New Energy Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), and Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, People's Republic of China.

出版信息

ACS Appl Mater Interfaces. 2011 Mar;3(3):705-9. doi: 10.1021/am1010095. Epub 2011 Mar 1.

DOI:10.1021/am1010095

PMID:21361300

Abstract

Fe(3)O(4)@C microcapsules were prepared using carbon-coated α-FeOOH nanorods as precursors, which were synthesized via two-step hydrothermal reactions. During the subsequent sintering procedure, α-FeOOH was reduced to Fe(3)O(4) by carbon, accompanied by the formation of mesopores. In Fe(3)O(4)@C microcapsules, mesoporous Fe(3)O(4) nanorods are coated with amorphorous carbon layers. The Fe(3)O(4)/C composites with such special structures demonstrate high specific capacity and good cyclic stability as anode materials in Li test cells.

摘要

Fe(3)O(4)@C 微胶囊是使用碳包覆的 α-FeOOH 纳米棒作为前体通过两步水热反应合成的。在随后的烧结过程中，α-FeOOH 被碳还原为 Fe(3)O(4)，同时形成介孔。在 Fe(3)O(4)@C 微胶囊中，介孔 Fe(3)O(4)纳米棒被非晶态碳层包覆。作为 Li 测试电池的阳极材料，具有这种特殊结构的 Fe(3)O(4)/C 复合材料表现出高比容量和良好的循环稳定性。