| 杜显振,李晓洁,刘泳,王勇,孟博.含金红石异相结构的二氧化钛合成钛酸锂的方法与改进[J].材料导报,2018,32(Z2):35-38 |
| 含金红石异相结构的二氧化钛合成钛酸锂的方法与改进 |
| Method and Improvement of Lithium Titanate Synthesized with Impurity Structure of Rutile |
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| DOI： |
| 中文关键词: 钛酸锂 金红石 二氧化钛 |
| 英文关键词: lithium titanate, rutile, titanium dioxide |
| 基金项目:基金项目:山东省重大科技创新工程项目(2017CXGC0505) |
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| 中文摘要: |
| 钛酸锂负极材料的主要工艺是二氧化钛和碳酸锂混合、烧结制备,二氧化钛作为钛酸锂的主要原料,其晶体结构为钛酸锂材料的结构提供了基础,因此原材料二氧化钛的结构直接影响了钛酸锂的合成与性能。实际工业生产所得二氧化钛常存在少量的金红石结构杂相,影响电化学性能发挥；对该类结构性质进行分析,通过600 ℃前段优化烧结可以缓解金刚石结构杂相带来的影响,同时730 ℃的后段烧结使得砂磨工艺下的分散性得到了良好保持,在600 ℃-3 h处理后,继续进行600 ℃-3 h+730 ℃-12 h烧结,钛酸锂成品材料可以达到165 mAh/g以上的电化学性能。 |
| 英文摘要: |
| The main approaches of lithium titanate anode material is prepared by sintering of titanium dioxide and lithium carbonate. As the main raw material for lithium titanate, the crystal structure of titanium dioxide provides a framework for the structure of lithium titanate, so the structure of the titanium dioxide directly affects the synthesis and properties of lithium titanate. There is a small amount of rutile structural heterozygosity in the titanium dioxide produced in the industrial production which always decrease the electrochemical performance. Through the clear analysis of this type of structure, the effect of the sintering of the titanium dio-xide is optimized through the front section of 600 ℃. At the same time, the post sintering at 730 ℃ makes the dispersion of the grinding process well maintained. After treatment at 600 ℃ for 3 h, the sintering temperature will continue at 600 ℃ for 3 h and 730 ℃ for 12 h, the material of lithium titanate can exhibit electrochemical properties above 165 mAh/g. |
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