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Conductive halloysite clay nanotubes for high performance sodium ion battery cathode
Abstract It is a practical challenge to find a cathode material for sodium ion batteries (SIBs) with high capacity and low cost. Here, conductive halloysite nanotubes (Hal) were synthesized by wrapping a layer of polypyrrole (PPy) via in situ polymerization as a potential cathode material for SIBs. By functionalization with PPy, the zeta potential of Hal changed from −28.5 mV to +30.1 mV, which showed excellent aqueous dispersion stability. HR-TEM and XPS results also demonstrated that a continuous conductive layer was formed around the tubes. By virtue of the good electrical conductivity and special tubular structure of Hal@PPy, it was applied as cathode for sodium ion battery. The Hal@PPy electrode could maintain a capacity of 126 mAh g−1 after 280 cycles at current density of 200 mA g−1, which suggested a high potential in energy storage fields.
Graphical abstract Display Omitted
Highlights In situ polymerization of pyrrole was conducted on the surface of halloysite. Conductive halloysite nanotubes composite was synthesized. Hal@PPy composite shows excellent dispersion stability in aqueous systems. Hal@PPy cathode exhibits outstanding reversible capacity and cycle stability.
Conductive halloysite clay nanotubes for high performance sodium ion battery cathode
Abstract It is a practical challenge to find a cathode material for sodium ion batteries (SIBs) with high capacity and low cost. Here, conductive halloysite nanotubes (Hal) were synthesized by wrapping a layer of polypyrrole (PPy) via in situ polymerization as a potential cathode material for SIBs. By functionalization with PPy, the zeta potential of Hal changed from −28.5 mV to +30.1 mV, which showed excellent aqueous dispersion stability. HR-TEM and XPS results also demonstrated that a continuous conductive layer was formed around the tubes. By virtue of the good electrical conductivity and special tubular structure of Hal@PPy, it was applied as cathode for sodium ion battery. The Hal@PPy electrode could maintain a capacity of 126 mAh g−1 after 280 cycles at current density of 200 mA g−1, which suggested a high potential in energy storage fields.
Graphical abstract Display Omitted
Highlights In situ polymerization of pyrrole was conducted on the surface of halloysite. Conductive halloysite nanotubes composite was synthesized. Hal@PPy composite shows excellent dispersion stability in aqueous systems. Hal@PPy cathode exhibits outstanding reversible capacity and cycle stability.
Conductive halloysite clay nanotubes for high performance sodium ion battery cathode
Cao, Xiang (author) / Sun, Yingjuan (author) / Sun, Yongrong (author) / Xie, Dong (author) / Li, Hongyan (author) / Liu, Mingxian (author)
Applied Clay Science ; 213
2021-08-18
Article (Journal)
Electronic Resource
English
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