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CoSn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 mA.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 mA·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.
参考文献
| [1] | T. Morishita;T. Hirabayashi;T. Okuni.Preparation of carbon-coated Sn powders and their loading onto graphite flakes for lithium ion secondary battery[J].Journal of Power Sources,20061(1):638-644. |
| [2] | M. Marcinek;L.J. Hardwick;T.J. Richardson;X. Song;R. Kostecki.Microwave plasma chemical vapor deposition of nano-structured Sn/C composite thin-film anodes for Li-ion batteries[J].Journal of Power Sources,20072(2):965-971. |
| [3] | Wenbo Yue;Sheng Yang;Yunling Liu;Xiaojing Yang.A facile synthesis of mesoporous graphene-tin composites as high-performance anodes for lithium-ion batteries[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,20134(4):1575-1580. |
| [4] | 米常焕;张校刚;曹高邵.锂离子电池负极合金CoSn和Cu-Sn的制备与表征[J].无机化学学报,2003(3):283-286. |
| [5] | 谢健;赵新兵;余红明;齐好;曹高劭;涂江平.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(11):1409-1412. |
| [6] | 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(12):1892-1896. |
| [7] | Meng-Yuan Li;Chun-Ling Liu;Mei-Rong Shi;Wen-Sheng Dong.Nanostructure Sn-Co-C composite lithium ion battery electrode with unique stability and high electrochemical performance[J].Electrochimica Acta,20118(8):3023-3028. |
| [8] | Zhongxue Chen;Jiangfeng Qian;Xinping Ai;Yuliang Cao;Hanxi Yang.Preparation and electrochemical performance of Sn-Co-C composite as anode material for Li-ion batteries[J].Journal of Power Sources,20091(1):730-732. |
| [9] | Ling Huang;Jin-Shu Cai;Yang He;Fu-Sheng Ke;Shi-Gang Sun.Structure and electrochemical performance of nanostructured Sn-Co alloy/carbon nanotube composites as anodes for lithium ion batteries[J].Electrochemistry communications,20095(5):950-953. |
| [10] | Junsheng Zhu;Dianlong Wang;Tiefeng Liu;Chenfeng Guo.Preparation of Sn-Co-graphene composites with superior lithium storage capability[J].Electrochimica Acta,2014:347-353. |
| [11] | Jianchao He;Hailei Zhao;Mengwei Wang;Xidi Jia.Preparation and characterization of Co-Sn-C anodes for lithium-ion batteries[J].Materials Science & Engineering, B. Solid-State Materials for Advanced Technology,20101/3(1/3):35-39. |
| [12] | 蔡金书;黄令;柯福生;孙世刚.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(1):79-82. |
| [13] | 沈丁;杨绍斌;张淑凯;薛维华.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(12):24-28. |
| [14] | Hong Guo;Hailei Zhao;Xidi Jia;Xue Li;Weihua Qiu.A novel micro-spherical CoSn{sub}2/Sn alloy composite as high capacity anode materials for Li-ion rechargeable batteries[J].Electrochimica Acta,200714(14):4853-4857. |
| [15] | Rachid Yazami;Yvan F. Reynier.Mechanism of self-discharge in graphite-lithium anode[J].Electrochimica Acta,20028(8):1217-1223. |
| [16] | 沈丁;杨绍斌;杨芳;张淑凯.固相烧结法制备Sn-Co合金及储锂性能研究[J].电源技术,2010(4):371-374. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%