| 锂离子电池用Li4Ti5O12-碳复合材料的制备与电化学性能 |
| Preparation and Electrochemical Properties of Li4Ti5O12-C Composite as Anode for Lithium Ion Batteries |
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| 摘要: |
| 关键词: 锂离子电池 Li4Ti5O12 负极 溶胶-凝胶法 |
| 基金项目: |
| Abstract: Li4Ti5O12-C composite was prepared by sol-gel method using ethyl alcohol as solvent, lithium acetate and tetrabutyl titanate as raw materials, and graphite as carbon source. Li4Ti5O12-C composites were characterized by thermogravimertric(TG) analysis and differential thermal analysis(DTA), X-ray diffraction(XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and electrochemical tests. Results show that Li4Ti5O12-C composite with 5% carbon containing can be obtained by annealing the precursor at 600 ℃ for 6 h in N2 atomsphere. The composites can deliver a specific capacity of 167.1 mAh·g-1, 99.0% and 105.1% of the capacity can be retained after discharged for 80 times at 0.1C and 2.0C, respectively. Compared with pure Li4Ti5O12, Li4Ti5O12-C composite shares larger discharge capacity, better cyclability and rate performance. |
| Keywords: lithium ion batteries Li4Ti5O12 anode sol-gel method |
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| 何则强,刘文萍,熊利芝,陈上,吴显明,樊绍兵.锂离子电池用Li4Ti5O12-碳复合材料的制备与电化学性能[J].无机化学学报,2007,23(4):733-737. |
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