Facile Preparation and Electrochemical Performances of LiMn₂O₄/Li_1.2(Mn_0.56Ni_0.16Co_0.08)O₂ Blend Cathode Materials for Lithium Ion Battery

Abstract:

The blend cathode materials LiMn₂O₄/Li_1.2(Mn_0.56Ni_0.16Co_0.08)O₂ have been successfully prepared by the physical mixing of commercial Li₂MnO₄ and self-prepared Li_1.2(Mn_0.56Ni_0.16Co_0.08)O₂ nanoparticles. The structures, morphologies and electrochemical performances are characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), Cyclic Voltammetry (CV) and charge-discharge test, and the results show that the good mass ratio of Li₂MnO₄ and Li_1.2(Mn_0.56Ni_0.16Co_0.08)O₂ is 50:50. Therein, the nanosized Li_1.2Ni_0.16Co_0.08Mn_0.56O₂ uniformly adhere on the surface of Li₂MnO₄ micro structure, and occupy the gap of Li₂MnO₄ particles, which can effectively elevate the tap density of Li_1.2(Mn_0.56Ni_0.16Co_0.08)O₂ nanoparticles. As lithium ion battery cathode, the 50:50 sample reveals an initial discharge capacity of 265.4 mAh/g with negligible irreversible capacity loss at current density of 0.1C within 2.0-4.8 V, and retain 89.2% after 20 cycles.

• Periodical: Materials Science Forum (Volume 852)
• Pages: 805-810
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.852.805
• Online since: April 2016
• Authors: Yun Long Zhou, Zhi Biao Hu, Chen Hao Zhao, Li Yan, Kai Yu Liu
• Keywords: Blend Cathode Materials, Li_1.2(Mn_0.56Ni_0.16Co_0.08)O₂, LiMn₂O₄, Lithium Ion Battery

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