Co-precipitation synthesis and electrochemical properties of graphene supported LiMn_1/3Ni_1/3Co_1/3O₂ cathode materials for lithium-ion batteries

Abstract

Nanostructured graphene supported LiMn1/3Ni1/3Co1/3O2 has been prepared by the co-precipitation method and used as the cathode material for lithium-ion batteries. The structure and morphology of the composite were examined using atomic force microscopy, scanning electron microscopy, high-resolution transmission electron microscopy, and x-ray diffraction. The composite cathodes made of graphene nanosheet supported LiMn1/3Ni1/3Co1/3O2 showed superior electrochemical performance and increased capacity compared to raw LiMn1/3Ni1/3Co1/3O2 electrodes. The outstanding electrochemical behavior of graphene supported LiMn1/3Ni1/3Co1/3O2 was ascribed to the increased electrical conductivity and high structural stability resulting from the addition of graphene.

Graphene‐Based Energy Devices

“…Ding et al [29] reported nanostructured-graphene-supported LiMn 1/3 Ni 1/3 Co 1/3 O 2 (LMNCO) prepared by the coprecipitation method. A schematic diagram of this synthetic process is shown in Figure 3.26.…”

“…29 shows the TEM micrograph and the electrochemical performance of the composite cathode. The composite with 5 wt% RGO exhibited high…”

“…(d)Electrochemical impedance spectra of these two film electrodes measured at the 20th fully discharged state[28]. 26 Illustration of the preparation of graphene-supported LMNCO[29].…”

“…(c) Cycling performance of LMNCO, LMNCO/graphene, and graphene-supported LMNCO. (d) Rate capability of LMNCO and LMNCO/graphene[29].…”

Facile fabrication of RGO wrapped LiMn2O4 nanorods as a cathode with enhanced specific capacity

“…Recently, RGO wrapped LiFePO 4 or LiCo 1/3 Ni 1/3 Mn 1/3 O 2 has been intensively investigated, which exhibit excellent high rate capability and cycling stability. [11][12][13][14] Generally, LiFePO 4 (LFP) or LiCo 1/3 Ni 1/3 Mn 1/3 O 2 (NCM) was rstly wrapped by GO with water as solvent, and then RGO/LFP or RGO/NCM was obtained by annealing at high temperature under argon atmosphere to reduce GO to RGO. It is obvious that such method is very complicated and the crystalline structure and morphology of the cathode or anode might be destroyed during the high temperature reduction process.…”