The influence of Graphene quality on performance of a Si/Graphene nanocomposite anode

Si/Graphene nanoparticles represent attractive alternative anode materials for Lithium-ion batteries. Graphene nanosheets with different properties, including surface area, defect distance, and charge-transfer resistance, were fabricated and characterised in Si/Graphene nanocomposites formed by stat...

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Bibliographic Details
Published inMaterials science and technology Vol. 35; no. 6; pp. 725 - 730
Main Authors Cen, Yinjie, Qin, Qingwei, Tao, Mingjiang, Sisson, Richard D., Liang, Jianyu
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 13.04.2019
SAGE Publications
Subjects
Anode
Electrochemistry
graphene
interphase
Lithium-ion Battery
Nanocomposites
self-assemble
Silicon
Nanocomposites
Anode
self-assemble
interphase
Electrochemistry
Silicon
Lithium-ion Battery
graphene
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Summary:Si/Graphene nanoparticles represent attractive alternative anode materials for Lithium-ion batteries. Graphene nanosheets with different properties, including surface area, defect distance, and charge-transfer resistance, were fabricated and characterised in Si/Graphene nanocomposites formed by static-electric self-assembly then by an in-situ reduction process. Graphene nanosheets that exhibited the highest surface area, the shortest defect distance, and the lowest charge-transfer resistance demonstrated the best overall electrochemical performance, with a high initial discharge capacity of 2692 mAh g −1 , good cycling performance of 1135 mAh g −1 , at the 200th cycle at the current rate of 0.5 C. This work shows the preferable graphene quality for Si/Graphene nanocomposite anode and provides insights into the design of graphene nanocomposite electrodes, regardless of the graphene synthesis method.
ISSN:0267-0836
1743-2847
DOI:10.1080/02670836.2019.1590506