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合理构建石墨碳化物复合丰富的Mn基氧化物阴极材料,以实现高性能离子电池

Fan-Fan Wang¹, Yu-Rui Ji¹, Yu-Hao Chen¹

¹School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China.

Journal of colloid and interface science

|August 23, 2023

概括

用g-C3N4涂层丰富的基氧化物 (LRMO) 提高了它们对下一代离子电池 (LIB) 的性能. 这种修改提高了效率,稳定性和速率能力,显示了商业应用的巨大潜力.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
纳米技术纳米技术

背景情况:

富的基氧化物 (LRMO) 为下一代离子电池 (LIB) 提供高能量密度.
然而,LRMO的第一周期效率较低,容量/电压衰减,速度性能有限,阻碍了商业化.

研究的目的:

为了提高Li1.2Mn0.54Ni0.13Co0.13O2 (LMNC) 阴极材料的电化学性能.
调查g-C3N4涂层对LMNC属性的影响,以改善LIB应用.

主要方法:

使用易溶液方法合成g-C3N4涂层LMNC阴极材料.
进行了电化学测试,以评估改性材料的性能.

主要成果:

该g-C3N4涂层有效地减轻了副作用,并改善了LMNC的电子导电性.
4%重量的g-C3N4涂层LMNC样本的初始库伦效率为78.5%,300个循环后容量保持率为78.8%,电压衰减最小 (0.48V).
涂层材料表现出高可逆容量,在0.1C时达到300 mAh g-1和10C时达到93 mAh g-1.

结论:

该g-C3N4涂层成功地抑制了结构崩,并改善了LMNC的周期稳定性.
修改后的LMNC材料显示出作为下一代LIBs的高性能阴极的巨大潜力.

关键词:

{1.2) Mn{0.54) 尼{0.13) 科{0.13) 欧{2} 的情况富含的不含的阴极是富含的.利率表现的表现率是什么反应动力学反应动力学 g-C ((3) N ((4)) 的情况.

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