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Phenazine anodes for ultralongcycle-life aqueous rechargeable batteries.
- Source :
- Journal of Materials Chemistry A; 12/28/2020, Vol. 8 Issue 48, p26013-26022, 10p
- Publication Year :
- 2020
-
Abstract
- A nano-phenazine@Ketjen black (nPZ/KB) composite was prepared as an anode for aqueous rechargeable batteries by an in situ dissolution–precipitation method. Due to the uniform precipitation of nano-phenazine on the highly conductive and hierarchical porous Ketjen black surface, it enabled ultrafast transfer of metal cations (Na<superscript>+</superscript>, K<superscript>+</superscript>, Zn<superscript>2+</superscript>etc.) and electrons to almost all the electrochemically active sites of phenazine molecules. Hence, nPZ/KB not only realized the full utilization of a theoretical capacity of 298 mA h g<superscript>−1</superscript> but also exhibited a high rate discharge capacity of 102 mA h g<superscript>−1</superscript> under 100 C in 6 M KOH. Furthermore, the nPZ/KB composite achieved an ultralong cycle life of 100 000 times with a high capacity retention of 76% because of the insolubilities of both phenazine and its reduction products in aqueous electrolytes. The excellent performance of the nPZ/KB-NiOOH battery and nPZ/KB-activated carbon pseudocapacitor demonstrated great promise for grid-scale energy storage devices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 8
- Issue :
- 48
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 147730050
- Full Text :
- https://doi.org/10.1039/d0ta08600b