作为高性能锂-S 电池电极的三维掺杂碳纳米片

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications Pub Date : 2024-09-16 DOI:10.1016/j.elecom.2024.107810

Tao Chen , Man Li , Joonho Bae

{"title":"作为高性能锂-S 电池电极的三维掺杂碳纳米片","authors":"Tao Chen , Man Li , Joonho Bae","doi":"10.1016/j.elecom.2024.107810","DOIUrl":null,"url":null,"abstract":"<div><div>3D petal-shaped Cobalt-doped carbon nanosheets (PCoCNS) were synthesized as excellent sulfur hosts for lithium-sulfur (Li-S) batteries. Co doping enhanced the affinity of the carbon surface for lithium polysulfides (LiPSs), inhibiting the shuttle effect. The electrocatalytic effect of the PCoCNS electrode exhibited enhanced polysulfide conversion kinetics, thereby promoting Li<sub>2</sub>S formation. Owing to the above advantages, the PCoCNS cathode exhibited satisfactory reversibility of 841 mAh/g with a high capacity retention of 91 %. Additionally, it displayed high coulombic efficiency (CE) values exceeding 97 % over 100 cycles at a current rate of 0.5C. Furthermore, the electrode demonstrated low polarization and exhibited an excellent rate performance, delivering a capacity of 575 mAh/g at the high rate of 3C. This study synthesized a promising sulfur cathode for enhancing the electrochemical performance of Li-S batteries.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"168 ","pages":"Article 107810"},"PeriodicalIF":4.7000,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"3D Co-doped carbon nanosheets as high-performance electrodes for Li-S batteries\",\"authors\":\"Tao Chen , Man Li , Joonho Bae\",\"doi\":\"10.1016/j.elecom.2024.107810\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>3D petal-shaped Cobalt-doped carbon nanosheets (PCoCNS) were synthesized as excellent sulfur hosts for lithium-sulfur (Li-S) batteries. Co doping enhanced the affinity of the carbon surface for lithium polysulfides (LiPSs), inhibiting the shuttle effect. The electrocatalytic effect of the PCoCNS electrode exhibited enhanced polysulfide conversion kinetics, thereby promoting Li<sub>2</sub>S formation. Owing to the above advantages, the PCoCNS cathode exhibited satisfactory reversibility of 841 mAh/g with a high capacity retention of 91 %. Additionally, it displayed high coulombic efficiency (CE) values exceeding 97 % over 100 cycles at a current rate of 0.5C. Furthermore, the electrode demonstrated low polarization and exhibited an excellent rate performance, delivering a capacity of 575 mAh/g at the high rate of 3C. This study synthesized a promising sulfur cathode for enhancing the electrochemical performance of Li-S batteries.</div></div>\",\"PeriodicalId\":304,\"journal\":{\"name\":\"Electrochemistry Communications\",\"volume\":\"168 \",\"pages\":\"Article 107810\"},\"PeriodicalIF\":4.7000,\"publicationDate\":\"2024-09-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electrochemistry Communications\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S138824812400153X\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ELECTROCHEMISTRY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrochemistry Communications","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S138824812400153X","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}

引用次数: 0

摘要

合成的三维花瓣形掺钴碳纳米片（PCoCNS）是锂硫（Li-S）电池的优良硫宿主。钴掺杂增强了碳表面对多硫化锂（LiPSs）的亲和力，抑制了穿梭效应。PCoCNS 电极的电催化效应表现出更强的多硫化物转化动力学，从而促进了 Li2S 的形成。由于上述优点，PCoCNS 阴极的可逆性达到了令人满意的 841 mAh/g，容量保持率高达 91%。此外，在 0.5C 电流速率下循环 100 次，其库仑效率 (CE) 值超过 97%。此外，该电极极化率低，速率性能优异，在 3C 的高速率下可提供 575 mAh/g 的容量。这项研究为提高锂-S 电池的电化学性能合成了一种前景广阔的硫阴极。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

3D Co-doped carbon nanosheets as high-performance electrodes for Li-S batteries

查看原文本刊更多论文

3D Co-doped carbon nanosheets as high-performance electrodes for Li-S batteries

3D petal-shaped Cobalt-doped carbon nanosheets (PCoCNS) were synthesized as excellent sulfur hosts for lithium-sulfur (Li-S) batteries. Co doping enhanced the affinity of the carbon surface for lithium polysulfides (LiPSs), inhibiting the shuttle effect. The electrocatalytic effect of the PCoCNS electrode exhibited enhanced polysulfide conversion kinetics, thereby promoting Li₂S formation. Owing to the above advantages, the PCoCNS cathode exhibited satisfactory reversibility of 841 mAh/g with a high capacity retention of 91 %. Additionally, it displayed high coulombic efficiency (CE) values exceeding 97 % over 100 cycles at a current rate of 0.5C. Furthermore, the electrode demonstrated low polarization and exhibited an excellent rate performance, delivering a capacity of 575 mAh/g at the high rate of 3C. This study synthesized a promising sulfur cathode for enhancing the electrochemical performance of Li-S batteries.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Electrochemistry Communications 工程技术-电化学

CiteScore

8.50

自引率

3.70%

发文量

160

审稿时长

1.2 months

期刊介绍： Electrochemistry Communications is an open access journal providing fast dissemination of short communications, full communications and mini reviews covering the whole field of electrochemistry which merit urgent publication. Short communications are limited to a maximum of 20,000 characters (including spaces) while full communications and mini reviews are limited to 25,000 characters (including spaces). Supplementary information is permitted for full communications and mini reviews but not for short communications. We aim to be the fastest journal in electrochemistry for these types of papers.