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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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al3+掺杂对li1.02mn2o4结构和电化学性能的影响
Abstract:
？用固相法合成了li1.02alxmn2-xo4(x=0.0,0.05,0.10,0.15,0.20,0.30)锂离子电池正极材料,研究了al3+对尖晶石型li1.02mn2o4的结构及电化学性能的影响.结果表明,当掺杂量x小于0.2时,没有出现杂相,掺杂量为0.3时,出现杂相al2o3;al3+的掺入能稳定晶体结构,使材料在充放过程中很好地保持稳定,减弱li+的能级分裂,改善材料的耐过充性能.当x=0.15时,初始最高容量为118.7mah·g-1,160次循环容量衰减至113.8mah·g-1,容量保持率为95.8%.al3+的加入使材料的电导率降低,但材料结构更加稳定,循环性能变得更好.
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