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In-situ one-step hydrothermal synthesis of a lead germanate-graphene composite as a novel anode material for lithium-ion batteries

Journal Article


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Abstract


  • Lead germanate-graphene nanosheets (PbGeO3-GNS) composites have been prepared by an efficient one-step, in-situ hydrothermal method and were used as anode materials for Li-ion batteries (LIBs). The PbGeO3 nanowires, around 100-200 nm in diameter, are highly encapsulated in a graphene matrix. The lithiation and de-lithiation reaction mechanisms of the PbGeO3 anode during the charge-discharge processes have been investigated by X-ray diffraction and electrochemical characterization. Compared with pure PbGeO3 anode, dramatic improvements in the electrochemical performance of the composite anodes have been obtained. In the voltage window of 0.01-1.50 V, the composite anode with 20 wt.% GNS delivers a discharge capacity of 607 mAh g(-1) at 100 mA g(-1) after 50 cycles. Even at a high current density of 1600 mA g(-1), a capacity of 406 mAh g(-1) can be achieved. Therefore, the PbGeO3-GNS composite can be considered as a potential anode material for lithium ion batteries.

Publication Date


  • 2014

Citation


  • Wang, J., Feng, C., Sun, Z., Chou, S., Liu, H. & Wang, J. (2014). In-situ one-step hydrothermal synthesis of a lead germanate-graphene composite as a novel anode material for lithium-ion batteries. Scientific Reports, 4 1-7.

Scopus Eid


  • 2-s2.0-84922565648

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2275&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1274

Number Of Pages


  • 6

Start Page


  • 1

End Page


  • 7

Volume


  • 4

Abstract


  • Lead germanate-graphene nanosheets (PbGeO3-GNS) composites have been prepared by an efficient one-step, in-situ hydrothermal method and were used as anode materials for Li-ion batteries (LIBs). The PbGeO3 nanowires, around 100-200 nm in diameter, are highly encapsulated in a graphene matrix. The lithiation and de-lithiation reaction mechanisms of the PbGeO3 anode during the charge-discharge processes have been investigated by X-ray diffraction and electrochemical characterization. Compared with pure PbGeO3 anode, dramatic improvements in the electrochemical performance of the composite anodes have been obtained. In the voltage window of 0.01-1.50 V, the composite anode with 20 wt.% GNS delivers a discharge capacity of 607 mAh g(-1) at 100 mA g(-1) after 50 cycles. Even at a high current density of 1600 mA g(-1), a capacity of 406 mAh g(-1) can be achieved. Therefore, the PbGeO3-GNS composite can be considered as a potential anode material for lithium ion batteries.

Publication Date


  • 2014

Citation


  • Wang, J., Feng, C., Sun, Z., Chou, S., Liu, H. & Wang, J. (2014). In-situ one-step hydrothermal synthesis of a lead germanate-graphene composite as a novel anode material for lithium-ion batteries. Scientific Reports, 4 1-7.

Scopus Eid


  • 2-s2.0-84922565648

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2275&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1274

Number Of Pages


  • 6

Start Page


  • 1

End Page


  • 7

Volume


  • 4