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


Autoria(s): Wang, Jun; Feng, Chuanqi; Sun, Ziqi; Chou, Shu-Lei; Liu, Hua-Kun; Wang, Jia-Zhao
Data(s)

2014

Resumo

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.

Formato

application/pdf

Identificador

http://eprints.qut.edu.au/94595/

Publicador

Nature Publishing Group

Relação

http://eprints.qut.edu.au/94595/1/94595.pdf

DOI:10.1038/srep07030

Wang, Jun, Feng, Chuanqi, Sun, Ziqi, Chou, Shu-Lei, Liu, Hua-Kun, & Wang, Jia-Zhao (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, Article Number-7030.

Direitos

Copyright 2014 The Author(s)

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Fonte

School of Chemistry, Physics & Mechanical Engineering; Science & Engineering Faculty

Tipo

Journal Article