Li4Ti5O12是具有良好应用前景的锂离子电池负极材料之一.本研究以聚丙烯酰胺(PAM)为模板剂和碳源,采用改进的固相合成法制备锂离子电池负极材料Li4Ti4.95Al0.05O12和Li4Ti4.95Al0.05O12/C.利用X射线衍射仪、场发射扫描电镜等测试手段表征材料的物相结构和形貌.结果表明:Al掺杂未改变Li4Ti5O12的尖晶石结构,合成过程中PAM模板剂的引入能够有效调控材料微观形貌并降低颗粒团聚程度.采用恒流充放电和交流阻抗测试材料的电化学性能,Li4Ti4.95Al0.05O12/C复合材料的比容量和循环性能得到明显改善,0.2C倍率下首次充放电比容量分别达到159.2和160.8mAh/g,5C倍率时仍有较好的循环性能.
参考文献
| [1] | Bruce P G.Energy storage beyond the horizon:rechargeable lithium batteries.Solid State Ionics,2008,179(21-26):752-760. |
| [2] | Aldon L,Kubiak P,Womes M,et al.Chemical and electrochemical Li-insertion into the Li4Ti5O12 spinel.Chemistry of Materials,2004,16(26):5721-5725. |
| [3] | Kang K.Electrodes with high power and high capacity for rechargeable lithium batteries.Science,2006,311(5763):977-980. |
| [4] | Park H E,Seong I W,Yoon W Y.Electrochemical behaviors of wax-coated Li powder/Li4Ti5O12 cells.Journal of Power Sources,2009,189(1):499-502. |
| [5] | Gao J,Ying J,Jiang C,et al.High-density spherical Li4Ti5O12/C anode material with good rate capability for lithium ion batteries.Journal of Power Sources,2007,166(1):255-259. |
| [6] | Huang S,Wen Z,Lin B,et al.The high-rate performance of the newly designed Li4Ti5O12/Cu composite anode for lithium ion batteries.Journal of Alloys and Compounds,2008,457(1/2):400-403. |
| [7] | Yu H,Zhang X,Jalbout A,et al.High-rate characteristics of novel anode Li4Ti5O12/polyacene materials for Li-ion secondary batteries.Electrochimica Acta,2008,53(12):4200-4204. |
| [8] | Hao Y J,Lai Q Y,Lu J Z,et al.Influence of various complex agents on electrochemical property of Li4Ti5O12 anode material.Journal of Alloys and Compounds,2007,439(1/2):330-336. |
| [9] | Wang G J,Gao J,Fu L J,et al.Preparation and characteristic of carbon-coated Li4Ti5O12 anode material.Journal of Power Sources,2007,174(2):1109-1112. |
| [10] | Gao J,Jiang C,Ying J,et al.Preparation and characterization of high-density spherical Li4Ti5O12 anode material for lithium secondary batteries.Journal of Power Sources,2006,155(2):364-367. |
| [11] | Wang D,Ding N,Song X H,et al.A simple gel route to synthesize nano-Li4Ti5O12 as a high-performance anode material for Li-ion batteries.Journal of Materials Science,2008,44(1):198-203. |
| [12] | Huang S,Wen Z,Zhang J,et al.Improving the electrochemical performance of Li4Ti5O12/Ag composite by an electroless deposition method.Electrochimica Acta,2007,52(11):3704-3708. |
| [13] | Huang S,Wen Z,Zhang J,et al.Li4Ti5O12/Ag composite as electrode materials for lithium-ion battery.Solid State Ionics,2006,177(9/10):851-855. |
| [14] | Yang L,Gao L.Li4Ti5O12/C composite electrode material synthesized involving conductive carbon precursor for Li-ion battery.Journal of Alloys and Compounds,2009,485(1/2):93-97. |
| [15] | Wang Z H,Chen G,Xu J,et al.Synthesis and electrochemical performances of Li4Ti4.95Al0.05O12/C as anode material for lithium-ion batteries.Journal of Physics and Chemistry of Solids,2011,72(6):773-778. |
| [16] | Tian B B,Xiang H F,Zhang L,et al.Effect of Nb-doing on electrochemical stability of Li4Ti5O12 discharged to 0 V.Journal of Solid State Electrochemistry,2012,16(1):205-211. |
| [17] | Gu F,Chen G,Wang Z H.Synthesis and electrochemical performances of Li4Ti4.95Zr0.05O12/C as anode material for lithium-ion batteries.Journal of Solid State Electrochemistry,2012,16(1):375-382. |
| [18] | Cai R,Yuan T,Ran R,et al.Preparation and re-examination of Li4Ti4.85Al0.15O12 as anode material of lihtium-ion battery.International Journal of Energy Research,2011,35:68-77. |
| [19] | Cai R,Jiang S M,Yu X,et al.A novel method to enhance rate performance of an Al-doped Li4Ti5O12 electrode by post-synthesis treatment in liquid formaldehyde at room temperature.Journal of Materials Chemistry,2012,22:8013-8021. |
| [20] | Yang S T,Zhao N H,Yin Y H,et al.Synthesis of LiFePO4/C nano-structure intergrowth by PAM soft templating method.Battery Bimonthly,2005,5(4):263-265. |
| [21] | Gao J,Mu X,Li J J,et al.Preparation and characterization of porous spherical Li4Ti5O12/C anode material for lithium ion batteries.Journal of Inorganic Materials,2012,27(3):253-257. |
| [22] | Shenouda Atef Y.,Li H.K.Studies on electrochemical behaviour of zinc-doped LiFePO4 for lithium battery positive electrode.Journal of Alloys and Compounds,2009,477(1/2):498-503. |
| [23] | Shenouda Atef Y,Li H K.Electrochemical behaviour of tin borophosphate negative electrodes for energy storage systems.Journal of Power Sources,2008,185(2):1386-1391. |
| [24] | Xiong X H,Wang Z X,Wu L,et al.Effect of Al-doping on structure and eletrochemical performance of Li4Ti5O12.The Chinese Journal of Nonferrous Metals,2011,21(9):2146-2150. |
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%