Dual-stage K + ion intercalation in V 2 O 5 -conductive polymer composites

We reported that the incorporation of a conductive polymer into V 2 O 5 materials resulted in an increased interlayer distance of 2.2 nm, favoring K + ion storage in aqueous electrolyte. In situ X-ray diffraction showed that during charging, K + ions were first inserted into the interlayer region of...

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Published inJournal of materials chemistry. A, Materials for energy and sustainability Vol. 9; no. 28; pp. 15629 - 15636
Main Authors Charles, Daniel S., Guo, Fenghua, Shan, Xiaoqiang, Kim, SaeWon, Lebens-Higgins, Zachary W., Xu, Wenqian, Su, Dong, Piper, Louis F. J., Teng, Xiaowei
Format Journal Article
LanguageEnglish
Published United Kingdom Royal Society of Chemistry (RSC) 20.07.2021
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Summary:We reported that the incorporation of a conductive polymer into V 2 O 5 materials resulted in an increased interlayer distance of 2.2 nm, favoring K + ion storage in aqueous electrolyte. In situ X-ray diffraction showed that during charging, K + ions were first inserted into the interlayer region of V 2 O 5 through pseudocapacitive intercalation and then continued to be inserted into the [VO 6 ] bi-layer region via diffusion-limited intercalation. This reversible dual-stage insertion/extraction mechanism provides new battery chemistry allowing the storage of around 50% more alkali ions in the intralayer region besides van der Waals gaps.
Bibliography:USDOE Office of Science (SC), Basic Energy Sciences (BES)
SC0010286; SC0018922; AC02-06CH11357; SC0012704
ISSN:2050-7488
2050-7496
DOI:10.1039/D1TA02003J