Mechanochemical synthesis and high-capacity performances of transition-metal borides as aqueous anode materials
详细信息 查看全文
- 作者：YaDong Wang (1)
XianYong Guang (2)
Mu Pan (1) - 关键词：borides ; multi ; electron reaction ; high capacity ; anode materials
- 刊名：Chinese Science Bulletin
- 出版年：2012
- 出版时间：November 2012
- 年：2012
- 卷：57
- 期：32
- 页码：4225-4228
- 全文大小：546KB
- 参考文献：1. Wang Y, Ai X, Cao Y, et al. Exceptional electrochemical activities of amorphous Fe-B and Co-B alloy pow-ders used as high capacity anode materials. Electrochem Commun, 2004, 6: 780-84 CrossRef
2. Wang Y, Guang X, Cao Y, et al. Electrooxidation and dischargeability of transition-metal borides as possible anodic materials in neutral aqueous electrolytes. J Appl Electrohcem, 2009, 3: 1039-044 CrossRef
3. Wang Y, Guang X, Cao Y, et al. Mechanochemical synthesis and electrochemical characterization of VB / x as high capacity anode materials for air batteries. J Alloy Compd, 2010, 501: L12–L14 CrossRef
4. Licht S, Wu H, Yu X, et al. Novel alkaline redox couple: Chemistry of the Fe6+/B2?/sup> super-iron boride battery. Chem Commun, 2007, 26: 2753-755 CrossRef
5. Licht S, Ghosh S, Wang B, et al. Nanoparticle facilitated charge transfer and voltage of a high capacity VB2 anode. Electrochem Solid State Lett, 2011, 14: A83–A85 CrossRef
6. Yu X, Licht S. A novel high capacity, environmentally benign energy storage system: Super-iron boride battery. J Power Sources, 2008, 179: 407-11 CrossRef
7. Licht S, Yu X, Wang Y, et al. The super-iron boride battery. J Electrochem Soc, 2008, 155: A297–A303 CrossRef
8. Bard A J, Parsons R, Jordan J. Standard Potentials in Aqueous Solution. New York: Marcel Dekker, 1985. 799
9. Milazzo G, Caroli S, Sharma V K. Tables of Standard Electrode Potentials. New York: John Wiley & Sons, 1978. 115
10. Shen P W, Che Y X, Luo Y J, et al. Inorganic Chemistry Series. Vol. 8. Xi’an: Science Press, 1984. 470 - 作者单位：YaDong Wang (1)
XianYong Guang (2)
Mu Pan (1)
1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
2. Department of Chemistry, Wuhan University, Wuhan, 430072, China - ISSN：1861-9541
文摘
Transition-metal borides MB0.5 (M = Co, Mo, V) were synthesized by high-speed mechanical ball-milling of the corresponding elemental metals and boron, and investigated as aqueous anode materials. The as-synthesized borides can achieve an excellent discharge capacity, about twice that of their parent transition metals. The metal boride electrodes also exhibit polarizations about 100-00 mV lower than those of their parent metals. The galvanostatic discharge curve of CoB0.5 shows a single discharge voltage plateau as a result of simultaneous electro-oxidation of elemental cobalt and/or amorphous cobalt boride. Both MoB0.5 and VB0.5 show two well-defined voltage plateaus, corresponding to the electro-oxidation of the corresponding metal and boride. These results show that the coexisting transition metal and boride in the metal borides co-activate each other in the ball-milling process, thereby significantly enhancing their electrochemical performances.