{"title":"使用 NASICON 型 Na3V2(PO4)3 阴极的钠离子电池:扩散式和电容式 Na+ 电荷储存的定量分析","authors":"Sivasubramaniam Ragul, Annadoure Prabakaran, Elayaperumal Sujithkrishnan, Kalidoss Kannadasan and Perumal Elumalai","doi":"10.1039/D4NJ02108H","DOIUrl":null,"url":null,"abstract":"<p >NASICON-type sodium vanadium phosphate (Na<small><sub>3</sub></small>V<small><sub>2</sub></small>(PO<small><sub>4</sub></small>)<small><sub>3</sub></small>) as a cathode for sodium-ion batteries has attracted widespread research interest due to its high operating voltage (∼3.3 V) and stable three-dimensional structural framework. However, it suffers from low specific capacity due to its poor electronic conductivity and limited redox features. To increase the specific discharge capacity of Na<small><sub>3</sub></small>V<small><sub>2</sub></small>(PO<small><sub>4</sub></small>)<small><sub>3</sub></small>, structural modifications are necessary. Thus, it is important to probe the influence of synthetic routes on the electrochemical performance of NASICON-type Na<small><sub>3</sub></small>V<small><sub>2</sub></small>(PO<small><sub>4</sub></small>)<small><sub>3</sub></small> (NVP). Herein, sodium vanadium phosphate was synthesized using a sol–gel method (NVP-SG) and a solid-state route (NVP-SS). NVP cathodes were tested and examined for laboratory prototype CR-2032 coin-type sodium-ion batteries. The NVP-SG cathode exhibited a passable discharge capacity of 130 mA h g<small><sup>−1</sup></small> at a 0.1C rate, whereas the NVP-SS cathode delivered a high discharge capacity of 160 mA h g<small><sup>−1</sup></small> at a 0.1C rate. The detailed charge storage modes of NVP synthesized through solid-state (NVP-SS) and sol–gel (NVP-SG) synthesis were examined by means of Dunn's analysis. Dunn's analysis confirmed that the charge storage is dominated by the diffusive mode at the peak potential region and the capacitive mode at the non-peak potential regions.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Sodium-ion battery using a NASICON-type Na3V2(PO4)3 cathode: quantification of diffusive and capacitive Na+ charge storage†\",\"authors\":\"Sivasubramaniam Ragul, Annadoure Prabakaran, Elayaperumal Sujithkrishnan, Kalidoss Kannadasan and Perumal Elumalai\",\"doi\":\"10.1039/D4NJ02108H\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >NASICON-type sodium vanadium phosphate (Na<small><sub>3</sub></small>V<small><sub>2</sub></small>(PO<small><sub>4</sub></small>)<small><sub>3</sub></small>) as a cathode for sodium-ion batteries has attracted widespread research interest due to its high operating voltage (∼3.3 V) and stable three-dimensional structural framework. However, it suffers from low specific capacity due to its poor electronic conductivity and limited redox features. To increase the specific discharge capacity of Na<small><sub>3</sub></small>V<small><sub>2</sub></small>(PO<small><sub>4</sub></small>)<small><sub>3</sub></small>, structural modifications are necessary. Thus, it is important to probe the influence of synthetic routes on the electrochemical performance of NASICON-type Na<small><sub>3</sub></small>V<small><sub>2</sub></small>(PO<small><sub>4</sub></small>)<small><sub>3</sub></small> (NVP). Herein, sodium vanadium phosphate was synthesized using a sol–gel method (NVP-SG) and a solid-state route (NVP-SS). NVP cathodes were tested and examined for laboratory prototype CR-2032 coin-type sodium-ion batteries. The NVP-SG cathode exhibited a passable discharge capacity of 130 mA h g<small><sup>−1</sup></small> at a 0.1C rate, whereas the NVP-SS cathode delivered a high discharge capacity of 160 mA h g<small><sup>−1</sup></small> at a 0.1C rate. The detailed charge storage modes of NVP synthesized through solid-state (NVP-SS) and sol–gel (NVP-SG) synthesis were examined by means of Dunn's analysis. Dunn's analysis confirmed that the charge storage is dominated by the diffusive mode at the peak potential region and the capacitive mode at the non-peak potential regions.</p>\",\"PeriodicalId\":95,\"journal\":{\"name\":\"New Journal of Chemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2024-06-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"New Journal of Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2024/nj/d4nj02108h\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"New Journal of Chemistry","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/nj/d4nj02108h","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
摘要
NASICON 型磷酸钒钠(Na3V2(PO4)3)作为钠离子电池的阴极,因其较高的工作电压(∼3.3 V)和稳定的三维结构框架而引起了广泛的研究兴趣。然而,由于其电子导电性差和有限的氧化还原特性,它的比容量较低。要提高 Na3V2(PO4)3 的比放电容量,必须对其结构进行改性。因此,探究合成路线对 NASICON 型 Na3V2(PO4)3 (NVP) 电化学性能的影响非常重要。本文采用溶胶-凝胶法(NVP-SG)和固态法(NVP-SS)合成了磷酸钒钠。对实验室原型 CR-2032 纽扣型钠离子电池的 NVP 阴极进行了测试和检验。NVP-SG 阴极在 0.1C 放电速率下的放电容量为 130 mA h g-1,而 NVP-SS 阴极在 0.1C 放电速率下的放电容量高达 160 mA h g-1。通过邓恩分析法研究了固态合成(NVP-SS)和溶胶凝胶合成(NVP-SG)的 NVP 的详细电荷存储模式。邓恩分析证实,电荷存储在峰值电位区域主要是扩散模式,在非峰值电位区域主要是电容模式。
Sodium-ion battery using a NASICON-type Na3V2(PO4)3 cathode: quantification of diffusive and capacitive Na+ charge storage†
NASICON-type sodium vanadium phosphate (Na3V2(PO4)3) as a cathode for sodium-ion batteries has attracted widespread research interest due to its high operating voltage (∼3.3 V) and stable three-dimensional structural framework. However, it suffers from low specific capacity due to its poor electronic conductivity and limited redox features. To increase the specific discharge capacity of Na3V2(PO4)3, structural modifications are necessary. Thus, it is important to probe the influence of synthetic routes on the electrochemical performance of NASICON-type Na3V2(PO4)3 (NVP). Herein, sodium vanadium phosphate was synthesized using a sol–gel method (NVP-SG) and a solid-state route (NVP-SS). NVP cathodes were tested and examined for laboratory prototype CR-2032 coin-type sodium-ion batteries. The NVP-SG cathode exhibited a passable discharge capacity of 130 mA h g−1 at a 0.1C rate, whereas the NVP-SS cathode delivered a high discharge capacity of 160 mA h g−1 at a 0.1C rate. The detailed charge storage modes of NVP synthesized through solid-state (NVP-SS) and sol–gel (NVP-SG) synthesis were examined by means of Dunn's analysis. Dunn's analysis confirmed that the charge storage is dominated by the diffusive mode at the peak potential region and the capacitive mode at the non-peak potential regions.