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Highly Conductive In-SnO2/RGO Nano-Heterostructures with Improved Lithium-Ion Battery Performance.

Liu Y, Palmieri A, He J, Meng Y, Beauregard N, Suib SL, Mustain WE - Sci Rep (2016)

Bottom Line: It was found that the incorporation of In into SnO2 reduces the charge transfer resistance during cycling, prolonging life.It is also hypothesized that the increased conductivity allows the tin oxide conversion and alloying reactions to both be reversible, leading to very high capacity near 1200 mAh/g.Finally, the electrodes show excellent rate capability with a capacity of over 200 mAh/g at 10C.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical &Biomolecular Engineering, University of Connecticut Storrs, CT 06269-3222, USA.

ABSTRACT
The increasing demand of emerging technologies for high energy density electrochemical storage has led many researchers to look for alternative anode materials to graphite. The most promising conversion and alloying materials do not yet possess acceptable cycle life or rate capability. In this work, we use tin oxide, SnO2, as a representative anode material to explore the influence of graphene incorporation and In-doping to increase the electronic conductivity and concomitantly improve capacity retention and cycle life. It was found that the incorporation of In into SnO2 reduces the charge transfer resistance during cycling, prolonging life. It is also hypothesized that the increased conductivity allows the tin oxide conversion and alloying reactions to both be reversible, leading to very high capacity near 1200 mAh/g. Finally, the electrodes show excellent rate capability with a capacity of over 200 mAh/g at 10C.

No MeSH data available.


Related in: MedlinePlus

(a) Powder XRD pattern of ITO/RGO composite, XPS spectrum of ITO/RGO composite, (b) broad scan spectra, high resolution spectra of (c) Sn 3d and (d) In 3d.
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f1: (a) Powder XRD pattern of ITO/RGO composite, XPS spectrum of ITO/RGO composite, (b) broad scan spectra, high resolution spectra of (c) Sn 3d and (d) In 3d.

Mentions: Figure 1 shows a typical powder X-ray diffraction (XRD) pattern for the synthesized ITO/RGO composite anode material. Compared to pure ITO (Fig. S1, Supporting information), an additional low intensity, broad (100) diffraction peak appeared at 2Θ = 43.5°, which can be indexed to disorderedly stacked graphene sheets (Fig. S2), though this broad peak is weaker than that of the as-prepared graphene. All of the other diffraction peaks can be ascribed to a rutile SnO2 structure (JCPDS 041-1445) with no secondary phases, indicating the effective incorporation of In into the SnO2. The 10 at% In in SnO2 was confirmed by EDS. The XRD patterns suggest that the composite consists of stacked RGO sheets and well-crystallized ITO. The XRD pattern of In2O3/RGO (Fig. S3) shows a bixbyite In2O3 cubic structure (JCPDS 06-0416) and a similar characteristic (100) graphene peak10.


Highly Conductive In-SnO2/RGO Nano-Heterostructures with Improved Lithium-Ion Battery Performance.

Liu Y, Palmieri A, He J, Meng Y, Beauregard N, Suib SL, Mustain WE - Sci Rep (2016)

(a) Powder XRD pattern of ITO/RGO composite, XPS spectrum of ITO/RGO composite, (b) broad scan spectra, high resolution spectra of (c) Sn 3d and (d) In 3d.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4863165&req=5

f1: (a) Powder XRD pattern of ITO/RGO composite, XPS spectrum of ITO/RGO composite, (b) broad scan spectra, high resolution spectra of (c) Sn 3d and (d) In 3d.
Mentions: Figure 1 shows a typical powder X-ray diffraction (XRD) pattern for the synthesized ITO/RGO composite anode material. Compared to pure ITO (Fig. S1, Supporting information), an additional low intensity, broad (100) diffraction peak appeared at 2Θ = 43.5°, which can be indexed to disorderedly stacked graphene sheets (Fig. S2), though this broad peak is weaker than that of the as-prepared graphene. All of the other diffraction peaks can be ascribed to a rutile SnO2 structure (JCPDS 041-1445) with no secondary phases, indicating the effective incorporation of In into the SnO2. The 10 at% In in SnO2 was confirmed by EDS. The XRD patterns suggest that the composite consists of stacked RGO sheets and well-crystallized ITO. The XRD pattern of In2O3/RGO (Fig. S3) shows a bixbyite In2O3 cubic structure (JCPDS 06-0416) and a similar characteristic (100) graphene peak10.

Bottom Line: It was found that the incorporation of In into SnO2 reduces the charge transfer resistance during cycling, prolonging life.It is also hypothesized that the increased conductivity allows the tin oxide conversion and alloying reactions to both be reversible, leading to very high capacity near 1200 mAh/g.Finally, the electrodes show excellent rate capability with a capacity of over 200 mAh/g at 10C.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical &Biomolecular Engineering, University of Connecticut Storrs, CT 06269-3222, USA.

ABSTRACT
The increasing demand of emerging technologies for high energy density electrochemical storage has led many researchers to look for alternative anode materials to graphite. The most promising conversion and alloying materials do not yet possess acceptable cycle life or rate capability. In this work, we use tin oxide, SnO2, as a representative anode material to explore the influence of graphene incorporation and In-doping to increase the electronic conductivity and concomitantly improve capacity retention and cycle life. It was found that the incorporation of In into SnO2 reduces the charge transfer resistance during cycling, prolonging life. It is also hypothesized that the increased conductivity allows the tin oxide conversion and alloying reactions to both be reversible, leading to very high capacity near 1200 mAh/g. Finally, the electrodes show excellent rate capability with a capacity of over 200 mAh/g at 10C.

No MeSH data available.


Related in: MedlinePlus