Restacked nanohybrid graphene layers with expanded interlayer distance enabled by inorganic spacer for highly efficient, flexible Na-ion battery anodes

Here, we demonstrate a novel synthetic route to prepare restacked nanohybrid graphene layers (NHGLs) with the expanded interlayer distance enabled by incorporating inorganic spacer for the reliable high-capacity sodium-ion battery (NIB) anodes. Nanohybrid graphene oxide flakes (NHGOFs) were obtained...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2021-04, Vol.886, p.115137, Article 115137
Main Authors: Shin, Dong Ok, Lim, Joonwon, Ju Lee, Myeong, Young Kim, Ju, Oh, Jimin, Hun Kang, Seok, Man Kim, Kwang, Lee, Young-Gi
Format: Article
Language:English
Subjects:
Anode effect
Cations
Expanded interlayer distance
Graphene
Interlayers
Nanohybrid graphene layers
Rechargeable batteries
Restacking process
Sodium-ion batteries
Substrates
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Summary:Here, we demonstrate a novel synthetic route to prepare restacked nanohybrid graphene layers (NHGLs) with the expanded interlayer distance enabled by incorporating inorganic spacer for the reliable high-capacity sodium-ion battery (NIB) anodes. Nanohybrid graphene oxide flakes (NHGOFs) were obtained through partial complexation of metallic Sn cation with graphene oxides (GOs) exfoliated from graphite. Negatively charged NHGOFs were restacked parallel to Zn substrate through an electrostatic interaction with Zn in an acidic solution. After detachment and freeze-drying step, NHGLs with the expanded interlayer distance of ~ 7.54 Å along the c-axis supported by metallic Sn cation spacer were achieved. To clarify the beneficial effect of the expanded interlayer distance, electrochemical performances of NHGLs anode were investigated. Finally, a flexible feature of restacked NHGLs anode was presented during a simple bending test using a pouch-type cell.
ISSN:1572-6657
1873-2569
DOI:10.1016/j.jelechem.2021.115137