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Graphene wrapped ordered LiNi0.5Mn1.5O4 nanorods as promising cathode material for lithium-ion batteries.

Tang X, Jan SS, Qian Y, Xia H, Ni J, Savilov SV, Aldoshin SM - Sci Rep (2015)

Bottom Line: The morphological characterization by scanning electron microscopy and transmission electron microscopy reveals that the LiNi0.5Mn1.5O4 nanorods of 100-200 nm in diameter are well dispersed and wrapped in the graphene nanosheets for the composite.Benefiting from the highly conductive matrix provided by graphene nanosheets and one-dimensional nanostructure of the ordered spinel, the composite electrode exhibits superior rate capability and cycling stability.As a result, the LiNi0.5Mn1.5O4-graphene composite electrode delivers reversible capacities of 127.6 and 80.8 mAh g(-1) at 0.1 and 10 C, respectively, and shows 94% capacity retention after 200 cycles at 1 C, greatly outperforming the bare LiNi0.5Mn1.5O4 nanorod cathode.

View Article: PubMed Central - PubMed

Affiliation: 1] School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China [2] Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing 210094, China.

ABSTRACT
LiNi0.5Mn1.5O4 nanorods wrapped with graphene nanosheets have been prepared and investigated as high energy and high power cathode material for lithium-ion batteries. The structural characterization by X-ray diffraction, Raman spectroscopy, and Fourier transform infrared spectroscopy indicates the LiNi0.5Mn1.5O4 nanorods prepared from β-MnO2 nanowires have ordered spinel structure with P4332 space group. The morphological characterization by scanning electron microscopy and transmission electron microscopy reveals that the LiNi0.5Mn1.5O4 nanorods of 100-200 nm in diameter are well dispersed and wrapped in the graphene nanosheets for the composite. Benefiting from the highly conductive matrix provided by graphene nanosheets and one-dimensional nanostructure of the ordered spinel, the composite electrode exhibits superior rate capability and cycling stability. As a result, the LiNi0.5Mn1.5O4-graphene composite electrode delivers reversible capacities of 127.6 and 80.8 mAh g(-1) at 0.1 and 10 C, respectively, and shows 94% capacity retention after 200 cycles at 1 C, greatly outperforming the bare LiNi0.5Mn1.5O4 nanorod cathode. The outstanding performance of the LiNi0.5Mn1.5O4-graphene composite makes it promising as cathode material for developing high energy and high power lithium-ion batteries.

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Schematic illustration of the design of the hybrid LiNi0.5Mn1.5O4-graphene electrode material.
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f1: Schematic illustration of the design of the hybrid LiNi0.5Mn1.5O4-graphene electrode material.

Mentions: Herein, we developed a facile method to prepare graphene nanosheets wrapped ordered LiNi0.5Mn1.5O4 nanorods as high energy and high power cathode material for lithium-ion batteries (Fig. 1). In the hybrid electrode design, the one-dimensional nanostructure of LiNi0.5Mn1.5O4 enables fast lithium ion transport while the graphene wrapping suppresses the side reactions at high voltage and further improves the electron transfer. It has been demonstrated that the graphene or grahene oxide nanosheets incorporation can greatly improve the rate capability and cycling stability for the disordered spinels2122. Consequently, the ordered LiNi0.5Mn1.5O4 nanorods-graphene composite cathode exhibited greatly improved cycling performance and rate performance compared to the bare ordered LiNi0.5Mn1.5O4 nanorods. The promising results indicate the great potential of developing high energy and high power lithium-ion batteries by utilizing the graphene nanosheets wrapped ordered LiNi0.5Mn1.5O4 nanorods.


Graphene wrapped ordered LiNi0.5Mn1.5O4 nanorods as promising cathode material for lithium-ion batteries.

Tang X, Jan SS, Qian Y, Xia H, Ni J, Savilov SV, Aldoshin SM - Sci Rep (2015)

Schematic illustration of the design of the hybrid LiNi0.5Mn1.5O4-graphene electrode material.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4493710&req=5

f1: Schematic illustration of the design of the hybrid LiNi0.5Mn1.5O4-graphene electrode material.
Mentions: Herein, we developed a facile method to prepare graphene nanosheets wrapped ordered LiNi0.5Mn1.5O4 nanorods as high energy and high power cathode material for lithium-ion batteries (Fig. 1). In the hybrid electrode design, the one-dimensional nanostructure of LiNi0.5Mn1.5O4 enables fast lithium ion transport while the graphene wrapping suppresses the side reactions at high voltage and further improves the electron transfer. It has been demonstrated that the graphene or grahene oxide nanosheets incorporation can greatly improve the rate capability and cycling stability for the disordered spinels2122. Consequently, the ordered LiNi0.5Mn1.5O4 nanorods-graphene composite cathode exhibited greatly improved cycling performance and rate performance compared to the bare ordered LiNi0.5Mn1.5O4 nanorods. The promising results indicate the great potential of developing high energy and high power lithium-ion batteries by utilizing the graphene nanosheets wrapped ordered LiNi0.5Mn1.5O4 nanorods.

Bottom Line: The morphological characterization by scanning electron microscopy and transmission electron microscopy reveals that the LiNi0.5Mn1.5O4 nanorods of 100-200 nm in diameter are well dispersed and wrapped in the graphene nanosheets for the composite.Benefiting from the highly conductive matrix provided by graphene nanosheets and one-dimensional nanostructure of the ordered spinel, the composite electrode exhibits superior rate capability and cycling stability.As a result, the LiNi0.5Mn1.5O4-graphene composite electrode delivers reversible capacities of 127.6 and 80.8 mAh g(-1) at 0.1 and 10 C, respectively, and shows 94% capacity retention after 200 cycles at 1 C, greatly outperforming the bare LiNi0.5Mn1.5O4 nanorod cathode.

View Article: PubMed Central - PubMed

Affiliation: 1] School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China [2] Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing 210094, China.

ABSTRACT
LiNi0.5Mn1.5O4 nanorods wrapped with graphene nanosheets have been prepared and investigated as high energy and high power cathode material for lithium-ion batteries. The structural characterization by X-ray diffraction, Raman spectroscopy, and Fourier transform infrared spectroscopy indicates the LiNi0.5Mn1.5O4 nanorods prepared from β-MnO2 nanowires have ordered spinel structure with P4332 space group. The morphological characterization by scanning electron microscopy and transmission electron microscopy reveals that the LiNi0.5Mn1.5O4 nanorods of 100-200 nm in diameter are well dispersed and wrapped in the graphene nanosheets for the composite. Benefiting from the highly conductive matrix provided by graphene nanosheets and one-dimensional nanostructure of the ordered spinel, the composite electrode exhibits superior rate capability and cycling stability. As a result, the LiNi0.5Mn1.5O4-graphene composite electrode delivers reversible capacities of 127.6 and 80.8 mAh g(-1) at 0.1 and 10 C, respectively, and shows 94% capacity retention after 200 cycles at 1 C, greatly outperforming the bare LiNi0.5Mn1.5O4 nanorod cathode. The outstanding performance of the LiNi0.5Mn1.5O4-graphene composite makes it promising as cathode material for developing high energy and high power lithium-ion batteries.

No MeSH data available.


Related in: MedlinePlus