Nanostructured potassium-organic framework as an effective anode for potassium-ion batteries with a long cycle life
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 7870-7874 |
Journal / Publication | Nanoscale |
Volume | 12 |
Issue number | 14 |
Online published | 5 Mar 2020 |
Publication status | Published - 14 Apr 2020 |
Externally published | Yes |
Link(s)
Abstract
Finding new organic materials to address several issues (e.g. capacity, stability, and cycle life) in organic potassium-ion batteries (OPIBs) is very important and highly desirable. Here, to directly investigate the redox reaction of organic pyridine dicarboxylate in OPIBs and to avoid the interference from the redox-active metal ions, a non-redox-metal potassium metal-organic framework (K-MOF), [C7H3KNO4]n, based on pyridine-2,6-dicarboxylic acid (H2PDA), has been successfully synthesized and applied as a promising organic anode for long-cycle life PIBs. The crystal structure of [C7H3KNO4]n was confirmed by single-crystal X-ray diffraction analysis and FT-IR spectra. Moreover, the potassium-storage mechanism of organic pyridine dicarboxylate ligand was revealed by ex situ FT-IR/XRD characterization and theoretical calculations. The as-synthesized K-MOF resulted in a unique and reversible three-step redox reaction, exhibited superior electrochemical performance with the aid of N-K/O-K coordination bonds, and showed a high average specific capacity of 115 mA h g-1 at 100 mA g-1 for 300 cycles with the capacity retention of 92%.
Citation Format(s)
Nanostructured potassium-organic framework as an effective anode for potassium-ion batteries with a long cycle life. / Li, Chao; Wang, Kuaibing; Li, Jingze; Zhang, Qichun.
In: Nanoscale, Vol. 12, No. 14, 14.04.2020, p. 7870-7874.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review