| 以微乳液法制备的锰源合成LiMn2O4 |
| Synthesis Spinel LiMn2O4 with Manganese Carbonate Prepared by Microemulsion Method |
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| 摘要: 采用CTAB-C8H18-C4H9OH-H2O微乳体系制备出MnCO3，将其灼烧成Mn2O3之后，与Li2CO3混合，800 ℃高温焙烧，获得了颗粒大小为数百纳米，均匀分布的纯相尖晶石LiMn2O4。这一材料的电化学性能优秀，0.5C的电流在3～4.2 V之间充放电时，首次放电比容量为124 mAh·g-1，经过110次循环，保留比容量118 mAh·g-1，平均每次容量损失<0.05%。该材料的倍率性能尤为优异，10C放电的比容量在110 mAh·g-1以上，功率约为0.2C时功率的45倍。 |
| 关键词: 锂离子电池 LiMn2O4 融盐法 |
| 基金项目: |
| Abstract: Micro-spherical type of MnCO3 was synthesized in CTAB-C8H18-C4H9OH-H2O microemulsion system. The MnCO3 was then decomposed to Mn2O3 and mixed with Li2CO3 and sintered at 800 ℃ for several hours to obtain the pure spinel LiMn2O4. The LiMn2O4 had initial discharge specific capacity of 124 mAh·g-1 at 0.5C discharge current between 3 V and 4.2 V, and kept 118 mAh·g-1 after 110 cycles, the loss ratio was lower than 0.05%. This material showed wonderful rate performance with cycle specific capacity of 110 mAh·g-1 at 10C current and the power was 45 times of that at 0.2C. |
| Keywords: lithium-ion battery LiMn2O4 microemulsion method |
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| 摘要点击次数: 1467 |
| 全文下载次数: 1995 |
| 杜柯,其鲁,胡国荣,彭忠东.以微乳液法制备的锰源合成LiMn2O4[J].无机化学学报,2007,23(1):21-24. |
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