상세정보
학술지
Restacked nanohybrid graphene layers with expanded interlayer distance enabled by inorganic spacer for highly efficient, flexible Na-ion battery anodes
- 발행일
- 202104
- 출처
- Journal of Electroanalytical Chemistry, v.886, pp.1-9
- ISSN
- 1572-6657
- 출판사
- Elsevier
- 협약과제
- 21ZB1200, ICT 소재·부품·장비 자립기술 및 도전기술 개발, 황치선
- 초록
- 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 횇 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.
- KSP 제안 키워드
- C-axis, Electrochemical performance, Electrostatic interaction, Graphene layers, Graphene oxide(GOS), High-capacity, Na-ion battery, Negatively charged, Sodium-ion battery, Synthetic route, Zn substrate