| 赵陈浩,陶明磊.钴掺杂Mn3O4作为模板制备锂离子电池正极LiMn2O4[J].井冈山大学自然版,2020,41(4):26-32 |
| 钴掺杂Mn3O4作为模板制备锂离子电池正极LiMn2O4 |
| SYNTHESIS OF Li-ION BATTERY CATHODE LiMn2O4 FROM Co DOPED Mn3O4 |
| 投稿时间：2020-01-06 修订日期：2020-04-08 |
| DOI：10.3969/j.issn.1674-8085.2020.04.006 |
| 中文关键词: 四氧化三锰 锰酸锂 钴掺杂 锂离子电池 循环稳定性 |
| 英文关键词: Mn3O4 LiMn2O4 Co doping lithium ion battery cycling stability |
| 基金项目:福建省自然科学基金项目（2018J01502）；福建省大学生创新创业训练计划项目（201911312041） |
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| 中文摘要: |
| 以水热合成的钴掺杂Mn3O4作为模板，通过固相反应制备尖晶石LiMn2O4。XRD谱图和SEM照片显示制备的LiMn2O4具有岩石状结构并呈现良好的结晶性，同时Co的引入能够引起LiMn2O4晶格的收缩。作为锂离子电池正极材料，Co含量的增加能够提高循环稳定性但降低材料放电比容量，3% Co掺杂的LiMn2O4在0.5 C的电流密度下，经过100次循环后，剩余放电比容量达101.6 mAh·g-1；在10 C的电流密度下，放电比容量可维持在81.0 mAh·g-1，优于未掺杂的LiMn2O4。这是由于Co的引入能够稳定LiMn2O4晶体结构并抑制循环中的姜-泰勒扭曲。 |
| 英文摘要: |
| Spinel LiMn2O4 have been prepared by solid state reaction using Co doped Mn3O4 as template. XRD patterns and SEM images show that the LiMn2O4 with rock-like morphology has excellent crystallinity, and the introduction of Co results in the lattice shrinkage of LiMn2O4. As the cathode materials of lithium ion battery, the increase of the Co contents will decrease of the discharge capacity accompanying with the improvement of cycling stability. 3% Co doped LiMn2O4 can retain a discharge capacity of 101.6 mAh g-1 after 100 cycles at a current density of 0.5 C, and a capacity value of 81.0 mAh·g-1 can be maintained even at a high rate of 10 C. The overall electrochemical performances of 3% Co doped LiMn2O4 are better than that of bare LiMn2O4. The increased stability of LiMn2O4 and decreased Jahn-Teller distortion during cycling, resulting from Co doping, may be responsible for the improvements. |
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