Journal
APPLIED CLAY SCIENCE
Volume 213, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.clay.2021.106265
Keywords
Clay nanotubes; Polypyrrole; Cathode; Interfaces; Sodium ion battery
Funding
- National Natural Science Foundation of China [52073121]
- Natural Science Foundation of Guangdong Province [2019A1515011509]
- Science and Technology Planning Project of Guangdong Province [2019A050513004]
- Science and Technology Program of Guangzhou, China [202102010117]
- Fundamental Research Funds for the Central Universities [21619102, 21620317]
- Start-up Funding of Jinan University [88016105, 55800001]
- Discipline Construction Outstanding Young Backbone Project [12819023]
- Guangdong Basic and Applied Basic Research Foundation [2020A1515110611, 2021A1515010362]
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The conductive halloysite nanotubes (Hal) functionalized with polypyrrole (PPy) showed excellent aqueous dispersion stability and electrical conductivity, making it a promising cathode material for sodium ion batteries. The continuous conductive layer formed around the tubes provided good cycling stability, with the Hal@PPy electrode maintaining a capacity of 126 mAh g-1 after 280 cycles at a current density of 200 mA g-1, indicating its high potential in energy storage applications.
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.
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