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Modified KCl Molten Salt Method Synthesis of Spinel LiNi0.5Mn1.5O4 with Loose Structure as Cathodes for Li-ion Batteries

机译:锂离子电池正极松散型尖晶石LiNi 0.5 Mn 1.5 O 4 的改进KCl熔盐法合成

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摘要

Spinel LiNi0.5Mn1.5O4 (LNMO) with a loose structure is successfully synthesized through a modifiedKCl molten salt method for the first time. Firstly, the precursor is prepared by a sol-gel method, andthen it is calcined with LiOH and the KCl molten salt to synthesize the product. To evaluate the effectof the synthesis conditions on the formation of spinel LNMO, the molten salt and calcinationatmosphere are investigated in detail. The structure and morphology of the materials are characterizedby X-ray diffraction and scanning electron microscopy. The LNMO synthesized under optimizedcondition exhibits a loose morphology consisting of 500-800 nm particles and more excellentelectrochemical performance especially in the rate performance, receiving a discharge capacity of-1 108.3 mAh g at 10 C. The superior performance is attributed to both the loose structure and uniformparticle.
机译:首次通过改进的氯化钾熔融盐法成功合成了具有疏松结构的尖晶石LiNi0.5Mn1.5O4(LNMO)。首先,通过溶胶-凝胶法制备前体,然后将其与LiOH和KCl熔融盐一起煅烧以合成产物。为了评估合成条件对尖晶石LNMO形成的影响,详细研究了熔融盐和煅烧气氛。通过X射线衍射和扫描电子显微镜表征材料的结构和形态。在优化条件下合成的LNMO表现出由500-800 nm颗粒组成的松散形态,并具有更优异的电化学性能,特别是在速率性能方面,在10 C下的放电容量为-1 108.3 mAh g。优异的性能归因于这两种松散的结构和均匀的粒子。

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