Shaocong Wang, Wei Li, Dan Sun, Yifei Guo, Zheng Liu, Guo-Cheng Han
{"title":"Na3V2（PO4）2F3和Ti3C2CQDs的双重改性对Na2MnPO4F电化学性能的改善","authors":"Shaocong Wang, Wei Li, Dan Sun, Yifei Guo, Zheng Liu, Guo-Cheng Han","doi":"10.1007/s11581-023-05208-3","DOIUrl":null,"url":null,"abstract":"<div><p>The effects of the two materials, Ti<sub>3</sub>C<sub>2</sub>-CQDs and Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>F<sub>3</sub>, on the electrochemical properties of Na<sub>2</sub>MnPO<sub>4</sub>F were systematically investigated by double modification of Na<sub>2</sub>MnPO<sub>4</sub>F by spray drying method combined with high-temperature calcination. Firstly, different ratios of xNa<sub>2</sub>MnPO<sub>4</sub>F-(1-x)Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>F<sub>3</sub> materials were synthesized and discussed to obtain 0.6Na<sub>2</sub>MnPO<sub>4</sub>F-0.4Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>F<sub>3</sub> material as optimal ratio. Ti<sub>3</sub>C<sub>2</sub>-CQDs were added on this basis, and electrochemical tests were performed at the same time. The initial discharge-specific capacity of 0.6Na<sub>2</sub>MnPO<sub>4</sub>F-0.4Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>F<sub>3</sub>/Ti<sub>3</sub>C<sub>2</sub>-CQDs was 137.4 mAh-g<sup>−1</sup>, indicating that Ti<sub>3</sub>C<sub>2</sub>-CQDs can improve the electronic conductivity as well as the ion diffusion rate of the material and the capacity retention rate. Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>F<sub>3</sub> can effectively inhibit the Jahn–Teller effect, enhance the stability of the material structure, and improve the electrochemical activity of the material. The synergistic modification leads to a double enhancement of the electrochemical performance of Na<sub>2</sub>MnPO<sub>4</sub>F. It hopes that the findings can provide ideas for improving the electrochemical properties of polyionic compounds.</p></div>","PeriodicalId":599,"journal":{"name":"Ionics","volume":"29 11","pages":"4639 - 4645"},"PeriodicalIF":2.4000,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Improvement of the electrochemical properties of Na2MnPO4F by dual modification of Na3V2(PO4)2F3 and Ti3C2-CQDs\",\"authors\":\"Shaocong Wang, Wei Li, Dan Sun, Yifei Guo, Zheng Liu, Guo-Cheng Han\",\"doi\":\"10.1007/s11581-023-05208-3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The effects of the two materials, Ti<sub>3</sub>C<sub>2</sub>-CQDs and Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>F<sub>3</sub>, on the electrochemical properties of Na<sub>2</sub>MnPO<sub>4</sub>F were systematically investigated by double modification of Na<sub>2</sub>MnPO<sub>4</sub>F by spray drying method combined with high-temperature calcination. Firstly, different ratios of xNa<sub>2</sub>MnPO<sub>4</sub>F-(1-x)Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>F<sub>3</sub> materials were synthesized and discussed to obtain 0.6Na<sub>2</sub>MnPO<sub>4</sub>F-0.4Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>F<sub>3</sub> material as optimal ratio. Ti<sub>3</sub>C<sub>2</sub>-CQDs were added on this basis, and electrochemical tests were performed at the same time. The initial discharge-specific capacity of 0.6Na<sub>2</sub>MnPO<sub>4</sub>F-0.4Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>F<sub>3</sub>/Ti<sub>3</sub>C<sub>2</sub>-CQDs was 137.4 mAh-g<sup>−1</sup>, indicating that Ti<sub>3</sub>C<sub>2</sub>-CQDs can improve the electronic conductivity as well as the ion diffusion rate of the material and the capacity retention rate. Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>F<sub>3</sub> can effectively inhibit the Jahn–Teller effect, enhance the stability of the material structure, and improve the electrochemical activity of the material. The synergistic modification leads to a double enhancement of the electrochemical performance of Na<sub>2</sub>MnPO<sub>4</sub>F. It hopes that the findings can provide ideas for improving the electrochemical properties of polyionic compounds.</p></div>\",\"PeriodicalId\":599,\"journal\":{\"name\":\"Ionics\",\"volume\":\"29 11\",\"pages\":\"4639 - 4645\"},\"PeriodicalIF\":2.4000,\"publicationDate\":\"2023-09-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Ionics\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11581-023-05208-3\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ionics","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s11581-023-05208-3","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Improvement of the electrochemical properties of Na2MnPO4F by dual modification of Na3V2(PO4)2F3 and Ti3C2-CQDs
The effects of the two materials, Ti3C2-CQDs and Na3V2(PO4)2F3, on the electrochemical properties of Na2MnPO4F were systematically investigated by double modification of Na2MnPO4F by spray drying method combined with high-temperature calcination. Firstly, different ratios of xNa2MnPO4F-(1-x)Na3V2(PO4)2F3 materials were synthesized and discussed to obtain 0.6Na2MnPO4F-0.4Na3V2(PO4)2F3 material as optimal ratio. Ti3C2-CQDs were added on this basis, and electrochemical tests were performed at the same time. The initial discharge-specific capacity of 0.6Na2MnPO4F-0.4Na3V2(PO4)2F3/Ti3C2-CQDs was 137.4 mAh-g−1, indicating that Ti3C2-CQDs can improve the electronic conductivity as well as the ion diffusion rate of the material and the capacity retention rate. Na3V2(PO4)2F3 can effectively inhibit the Jahn–Teller effect, enhance the stability of the material structure, and improve the electrochemical activity of the material. The synergistic modification leads to a double enhancement of the electrochemical performance of Na2MnPO4F. It hopes that the findings can provide ideas for improving the electrochemical properties of polyionic compounds.
期刊介绍：
Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.
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