沈丁,杨绍斌,董伟,孟阳

• 1:辽宁工程技术大学材料科学与工程学院

摘要(Abstract)：

采用球磨法将Sn-Co合金与石墨复合制备了Sn-Co/石墨复合材料,并对其进行热处理,研究了热处理温度对复合材料结构和电化学性能的影响。结果表明,Sn-Co/石墨复合材料由Co Sn相和石墨组成,Sn-Co合金一部分嵌入石墨颗粒内部,一部分吸附在石墨颗粒表面。电化学测试表明,Sn-Co/石墨复合材料兼具高容量和长循环寿命的优点,首次放电容量和库伦效率分别为349 m A·h/g和81.3%,经过25次循环后的容量保持率为88.3%。热处理导致Sn-Co合金的晶粒长大和Co3Sn2新相的出现,同时降低了复合材料的比表面积。当热处理温度为500℃时,首次放电容量和库伦效率分别为362 m A·h/g和83.6%,经过25次循环后的容量保持率达92.8%,表现出良好的结构稳定性。

关键词(KeyWords)： 锂离子电池;Sn-Co;石墨;热处理;电化学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51274119);; 辽工大市场调研基金项目(SCDY2013003)

作者(Author): 沈丁,杨绍斌,董伟,孟阳

DOI: 10.13289/j.issn.1009-6264.2016.01.010

参考文献(References)：

• [1]Mao O,Dahn J R.Mechanically alloyed Sn-Fe(-C)powders as anode materials for Li-ion batteries-The Sn Fe2:Sn Fe3C active/inactive system[J].J Electrochem Soc A,1999,146(2):423-427.
• [2]Morishitaa T,Hirabayashib T,Okunib T,et al.Preparation of carbon-coated Sn powders and their loading onto graphite flakes for lithium ion secondary battery[J].Journal of Power Sources,2006,160(1):638-644.
• [3]Marcinek M,Hardwick L J,Richardson T J,et al.Microwave plasma chemical vapor deposition of nano-structured Sn/C composite thin-film anodes for Li-ion batteries[J].Journal of Power Sources,2007,173(2):965-971.
• [4]Yue Wenbo,Yang Sheng,Liu Yun-ling,et al.A facile synthesis of mesoporous graphene-tin composites as high-performance anodes for lithium-ion batteries[J].Materials Research Bulletin,2013,48(4):1575-1580.
• [5]米常焕,张校刚,曹高邵.锂离子电池负极合金Co Sn和Cu-Sn的制备与表征[J].无机化学学报,2003,3(19):283-286.MI Chang-huan,ZHANG Xiao-gang,CAO Gao-shao.Synthesis and Characteristics of Co Sn and Cu-Sn alloy[J].Chinese Journal of Inorganic Chemistry,2003,3(19):283-286.
• [6]谢健,赵新兵,余红明,等.纳米Co-Sn金属间化合物的合成、表征及电化学吸放锂行为[J].物理化学学报,2006,22(11):1409-1412.XIE Jian,ZHAO Xin-bing,YU Hong-ming,et al.Preparation,characterization and electrochemical Li-absorption/extraction behaviors of nanosized CoSn intermetallic compounds[J].Acta Physico-chimical Sinica,2006,22(11):1409-1412.
• [7]Zhang J J,Xia Y Y.Co-Sn alloys as negative electrode materials for rechargeable lithium batteries[J].J Electrochem Soc A,2006,153(8):1466-1471.
• [8]沈丁,杨绍斌,张淑凯.锂离子电池锡钴和锡钴碳负极材料的研究进展[J].化工进展,2008,27(12):1892-1896.SHEN Ding,YANG Shao-bin,ZHANG Shu-kai.Development of Sn-Co and Sn-Co-C anode materials for Li-ion batteries[J].Chemical Industry and Engineering Progress,2008,27(12):1892-1896.
• [9]Li M Y,Liu C L,Shi M R,et al.Nanostructure Sn-Co-C composite lithium ion battery electrode with unique stability and high electrochemical performance[J].Electrochimica Acta,2011,56(8):3023-3028.
• [10]Chen Z X,Qian J F,Ai X P,et al.Preparation and electrochemical performance of Sn-Co-C composite as anode material for Li-ion batteries[J].Journal of Power Sources,2009,189(1):730-732
• [11]Nacimiento F,Alcántara R,Tirado J L.PAN-encapsulated nanocrystalline Co Sn2 particles as negative electrode active material for lithium-ion batteries[J].J Electrochem Soc A,2010,157(6):666-671.
• [12]Huang L,Cai J S,He Y,et al.Structure and electrochemical performance of nanostructured Sn-Co alloy/carbon nanotube composites as anodes for lithium ion batteries[J].Electrochemistry Communications,2009,11(5):950-953.
• [13]Zhu J S,Wang D L,Liu T F,et al.Preparation of Sn-Co-graphene composites with superior lithium storage capability[J].Electrochimica Acta,2014,125(10):347-353.
• [14]He J C,Zhao H L,Wang M W.Preparation and characterization of Co-Sn-C anodes for lithium-ion batteries[J].Materials Science and Engineering,2010,171(1/3):35-39.
• [15]蔡金书,黄令,柯福生,等.纳米Sn-Co/石墨复合材料的制备,结构和电化学性能[J].电化学,2009,15(1):79-82.CAI Jin-shu,HUANG Ling,KE Fu-sheng,et al.Synthesis,characteristics and electrochemical performance of nano-sized Sn Co/graphite composites as anode for lithium ion batteries[J].Journal of Electrochemistry,2009,15(1):79-82.
• [16]沈丁,杨绍斌,张淑凯,等.球磨法制备Sn-Co合金及其可逆储锂性能[J].材料热处理学报,2010,31(12):24-28.SHEN Ding,YANG Shao-bin,ZHANG Shu-kai,et al.Synthesis and lithium storage performances of Sn-Co alloy by ball milling method[J].Transations of Materials and Heat Treatment,2010,31(12):24-28.
• [17]Guo H,Zhao H L,Jia X D,et al.A novel micro-spherical Co Sn2/Sn alloy composite as high capacity anode materials for Li-ion rechargeable batteries[J].Electrochimica Acta,2007,52(14):4853-4857.
• [18]Yazami R,Reynier Y F.Mechanism of self-dischare in graphite-lithium anode[J].Electrochimica Acta,2002,47:1217-1223.
• [19]Vassilev G P,Lilova K I,Gachon J C.Calorimetric and phase diagram studies of the Co-Sn system[J].Intermetallics,2007,10:1016-1023.
• [20]沈丁,杨绍斌,杨芳,等.固相烧结法制备Sn-Co合金及储锂性能研究[J].电源技术,2010,34(4):371-374.SHEN Ding,YANG Shao-bin,YANG Fang,et al.Synthesis and lithium storage performance of Sn-Co alloys by solid-state sintering method[J].Chinese Journal of Power Sources,2010,34(4):371-374.

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