以聚丙烯腈基活性碳纤维(PAN-ACF)和SnCl2为原料,采用溶胶-凝胶法制备PAN-ACF/SnO2复合材料并将其用作锂离子电池负极材料.采用X射线衍射仪(XRD)分析材料的组成及晶体结构；用扫描电镜(SEM)观察样品形貌；用热失重分析(TGA)对复合材料中SnO2的含量进行测定；用恒流充放电、交流阻抗(EIS)和循环伏安(CV)对复合材料作为锂离子电池负极材料的电化学性能进行表征.结果表明,SnO2的含量对产物的形貌、结构和电化学性能有重要的影响.所制得的PAN-ACF/SnO2复合材料中SnO2的晶格常数a=0.4739 nm和c=0.3181 nm,为四方金红石结构.PAN-ACF表面在多次充放电过程中未发生明显变化.该复合材料用作锂离子电池负极材料时,在电流密度为50 mA/g的条件下,SnO2含量为41.9％的复合材料首次放电高达1824 mAh/g,20次后容量仍保持在450 mAh/g左右并趋于稳定,呈现出良好的循环性能.
参考文献
| [1] | Wang Y,Cao G Z.Developments in nanostructured cathode materials for high-performance lithium-ion batteries.Adv.Mater.,2008,20(12):2251-2269. |
| [2] | Scrosati B.Recent advances in lithium ion battery materials.Electrochim.Acta,2000,45(15/16):2461-2466. |
| [3] | Jeffreg W F.Recent developments in cathode materials for lithium ion batteries.J.Power Sources,2010,195(4):939-954. |
| [4] | Luo J Y,Cui W J,He P,et al.Raising the cycling stability of aqueous lithium-ion batteries by eliminating oxygen in the electrolyte.Nat.Chem.2010,2(9):760-765. |
| [5] | Wu Y P,Rahm E,Holze R.Carbon anode materials for lithium ion batteries.J.Power Sources,2003,114(2):228-236. |
| [6] | Flandrois S,Simon B.Carbon materials for lithium-ion rechargeable batteries.Carbon,1999,37(2):165-180. |
| [7] | Yang T,Guo Y L,Zhou X C,et al.Preparation of amorphous carboncoated nano-scale SnO2 and its performance for anode material of lithium ion secondary battery.Journal of Inorganic Materials,2009,24(1):147-151. |
| [8] | Kjell M H,Jacques E,Zenkert D,et al.PAN-based carbon fiber negative electrodes for structural lithium-ion batteries.J.Electrochem.Soc,2011,158(12):A1455-A1460. |
| [9] | Snyder J F,Wong E L,Hubbard C W.Evaluation of commercially available carbon fibers,fabrics,and papers for potential use in multifunctional energy storage applications.J.Electrochem.Soc.,2009,156(3):A215-A224. |
| [10] | Lee J K,An K W,Ju J B,et al.Electrochemical properties of PAN-based carbon fibers as anodes for rechargeable lithium ion batteries.Carbon,2001,39(9):1299-1305. |
| [11] | Tatsumi K,Kawamura T,Higuchi S,et al.Anode characteristics of non-graphitizable carbon fibers for rechargeable lithium-ion batteries.J.Power Sources,1997,68(2):263-266. |
| [12] | Ortiz G F,Alcántara R,Rodríguez I,et al.New tin-based materials containing cobalt and carbon for lithium-ion batteries.J.Electroana.Chem,2007,605(2):98-108. |
| [13] | Yuan L,Wang J,Chew S Y,et al.Synthesis and characterization of SnO2-polypyrrole composite for lithium-ion battery.J.Power Sources,2007,174(2):1183-1187. |
| [14] | Chen J S,Cheah Y L,Chen Y T,et al.SnO2 nanoparticles with controlled carbon nano coating as high-capacity anode materials for lithium-ion batteries.J.Phys.Chem.C,2009,113(47):20504-20508. |
| [15] | Winter M,Besenhard J O.Electrochemical lithiation of tin and tin-based intermetallics and composites.Electrochim.Acta,1999,45(1/2):31-50. |
| [16] | Besenhard J O,Yang J,Winter M.Will advanced lithium-alloy anodes have a chance in lithium-ion batteries? J.Power Sources,1997,68(1):87-90. |
| [17] | Ma M Y,He Z Q,Xiao Z B,et al.Synthesis and electrochemical properties of SnO2-CuO nanocomposite powders.T.Nonferr.Metal.Soc.,2006,16(4):791-794. |
| [18] | Lou X W,Deng D,Lee J Y,et al.Preparation of SnO2/Carbon composite hollow spheres and their lithium storage properties.Chem.Mater.,2008,20(20):6562-6566. |
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%