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首页> 外文期刊>International Journal of Electrochemical Science >Graphene Oxide Modified LiNi1/3Co1/3Mn1/3O2 as Cathode Material for Lithium Ion Batteries and Its Electrochemical Performances
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Graphene Oxide Modified LiNi1/3Co1/3Mn1/3O2 as Cathode Material for Lithium Ion Batteries and Its Electrochemical Performances

机译：氧化石墨烯修饰的LiNi 1/3 Co 1/3 Mn 1/3 O 2 作为锂的正极材料离子电池及其电化学性能

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摘要

LiNi1/3Co1/3Mn1/3O2(NCM) was coated with graphene oxide(GO) by a simple chemical approach. Theprepared materials were characterised using various techniques such as X-ray diffraction (XRD),thermogravimetric analysis, scanning electron microscopy, energy dispersive spectroscopy,transmission electron microscopy and X-ray photoelectron spectroscopy. XRD revealed that the crystalstructure and crystallinity do not change after surface modification with GO. The 2.5 wt% GO-coatedNCM exhibits stable cycling stability with a capacity retention of 84.2% at 1 C after 100 cycles, whichis higher than the corresponding value of 74.3% for the pristine sample. The rate performance resultsshow that the GO coating increases the discharge capacity from 87.1 to 100.9 mAh g?1 at a high rate of5 C. Therefore, GO-coated NCM is a highly promising cathode material for lithium-ion batteriesbecause it provides good cycling stability and high rate performance.
机译：LiNi1 / 3Co1 / 3Mn1 / 3O2（NCM）通过一种简单的化学方法涂覆了氧化石墨烯（GO）。使用诸如X射线衍射（XRD），热重分析，扫描电子显微镜，能量色散光谱，透射电子显微镜和X射线光电子光谱的各种技术对制备的材料进行表征。 XRD表明，用GO进行表面改性后，晶体结构和结晶度没有改变。 2.5％（重量）GO涂层的NCM表现出稳定的循环稳定性，在100次循环后，在1 C下的容量保持率为84.2％，高于原始样品的相应值74.3％。速率性能结果表明，GO涂层在5 C的高速率下将放电容量从87.1增加到100.9 mAh g？1。因此，GO涂层NCM是锂离子电池极有希望的正极材料，因为它提供了良好的循环稳定性和稳定性。高速率性能。

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