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首页> 外文期刊>International Journal of Electrochemical Science >Synthesis and Characterization of 0.5Li2MnO3-0.5LiNi1/4Mn1/4Co1/2O2/C Composite with Improved Performance for Lithium Ion Battery
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Synthesis and Characterization of 0.5Li2MnO3-0.5LiNi1/4Mn1/4Co1/2O2/C Composite with Improved Performance for Lithium Ion Battery

机译：0.5Li 2 MnO 3 -0.5LiNi 1/4 Mn 1/4 Co 的合成与表征锂离子电池性能提高的> 1/2 O 2 / C复合材料

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摘要

Li2MnO3-0.5LiNi1/4Mn1/4Co1/2O2/C composite is prepared by coprecipitation method followed bysintering with sucrose in the air. The 0.5Li2MnO3-0.5LiNi1/4Mn1/4Co1/2O2/C composite is characterizedby X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electroscopy (TEM)and electrochemical tests. The effects of carbon coating on the morphology, structure andelectrochemical properties of the lithium and manganese-rich materials are investigated. Based on themorphological results, a thin layer of residual carbon is observed on the surface of the 0.5Li2MnO3- 0.5LiNi1/4Mn1/4Co1/2O2 particle. Electrochemical and structural results demonstrate that the carboncoating greatly improves the electrochemical property and rate capability of 0.5Li2MnO3- 0.5LiNi1/4Mn1/4Co1/2O2 without destroying its crystal structure. The improvements of the carbon coatedmaterial can be attributed to its enhanced conductivity and electrochemical kinetic.
机译：共沉淀法制备Li2MnO3-0.5LiNi1 / 4Mn1 / 4Co1 / 2O2 / C复合材料，然后与蔗糖在空气中烧结。通过X射线衍射（XRD），扫描电镜（SEM），透射电镜（TEM）和电化学测试对0.5Li2MnO3-0.5LiNi1 / 4Mn1 / 4Co1 / 2O2 / C复合材料进行了表征。研究了碳涂层对富含锂和锰的材料的形貌，结构和电化学性能的影响。基于形态学结果，在0.5Li2MnO3-0.5LiNi1 / 4Mn1 / 4Co1 / 2O2颗粒的表面上观察到一薄层残留碳。电化学和结构结果表明，碳涂层大大改善了0.5Li2MnO3- 0.5LiNi1 / 4Mn1 / 4Co1 / 2O2的电化学性能和倍率性能，而没有破坏其晶体结构。碳涂层材料的改进可以归因于其增强的电导率和电化学动力学。

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