锂离子电池富锂层状正极材料的表面改性及电化学性能 |
Surface Modification and Electrochemical Properties of Li-Rich Layered Cathode Materials for Lithium-Ion Batteries |
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摘要: 采用一种简单、实用的“浸润-泥化-干燥”结合固相烧结工艺对富锂层状正极材料Li1.2Mn0.54Ni0.13Co0.13O2进行表面改性。这种表面改性的正极材料具有280 mAh·g-1以上的高比容量,在0.5C下历经70周充放电循环后容量保持率达91.6%,与本体材料相比,表现出较优的循环稳定性。 |
关键词: 富锂 表面改性 正极 循环稳定性 |
基金项目: 国家自然科学基金(No.51702362,51902343)和湖南省自然科学基金(No.2018JJ3595)资助。 |
Abstract: A convenient, economical strategy of the"dipping-grinding-sliming"process followed by solid phase sintering was used for surface modification of Li-rich layered cathode materials Li1.2Mn0.54Ni0.13Co0.13O2. The experimental results expressed that compared with pristine material, the surface-modified cathode material exhibited satisfactory cyclic stability. It had an initial capacity of more than 280 mAh·g-1. After 70 charging-discharging cycles at 0.5C, it had capacity retention of 91.6%. |
Keywords: lithium-rich surface modification cathode cyclic stability |
投稿时间:2021-10-15 修订日期:2022-05-10 |
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杨金戈,李宇杰,刘勇,陈宇方,陆地,孙巍巍,郑春满.锂离子电池富锂层状正极材料的表面改性及电化学性能[J].无机化学学报,2022,38(7):1252-1260. |
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