{"title":"利用异质结构 N-C/Fe3C/Fe 阴极催化剂实现具有调节放电产物的高效 Li-CO2 电池","authors":"","doi":"10.1016/j.jpowsour.2024.235592","DOIUrl":null,"url":null,"abstract":"<div><div>Lithium carbon dioxide (Li-CO<sub>2</sub>) batteries have been regarded as a promising technology to alleviate the greenhouse effect and meet the demands for high-energy applications. However, the sluggish CO<sub>2</sub> transformation kinetics and the Li<sub>2</sub>CO<sub>3</sub>-related parasitic reactions degrade the battery's performance. Herein, we introduce a heterostructure N-doped carbon combined Fe<sub>3</sub>C/Fe as a low-cost catalyst to regulate the formation of discharged product and accelerate the CO<sub>2</sub> redox kinetics. Systematically experimental characterizations reveal that the as-designed heterostructure can control the discharge product as the amorphous form to reduce the polarization voltage, thereby improving the cycle stability and increasing the energy efficiency of the battery. As a result, the assembled Li-CO<sub>2</sub> batteries exhibit a high full discharge capacity of 16550 mAh g<sup>−1</sup> with an excellent initial Coulombic efficiency of 96.7 % and maintain a low overpotential of 1.42 V over 200 cycles at 300 mA g<sup>−1</sup>. This work provides a new research insight to design high-efficient and low-cost Li-CO<sub>2</sub> batteries with small overpotential and long-lifespan.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Highly efficient Li-CO2 batteries with regulated discharge product enabled by a hetero-structured N-C/Fe3C/Fe cathodic catalyst\",\"authors\":\"\",\"doi\":\"10.1016/j.jpowsour.2024.235592\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Lithium carbon dioxide (Li-CO<sub>2</sub>) batteries have been regarded as a promising technology to alleviate the greenhouse effect and meet the demands for high-energy applications. However, the sluggish CO<sub>2</sub> transformation kinetics and the Li<sub>2</sub>CO<sub>3</sub>-related parasitic reactions degrade the battery's performance. Herein, we introduce a heterostructure N-doped carbon combined Fe<sub>3</sub>C/Fe as a low-cost catalyst to regulate the formation of discharged product and accelerate the CO<sub>2</sub> redox kinetics. Systematically experimental characterizations reveal that the as-designed heterostructure can control the discharge product as the amorphous form to reduce the polarization voltage, thereby improving the cycle stability and increasing the energy efficiency of the battery. As a result, the assembled Li-CO<sub>2</sub> batteries exhibit a high full discharge capacity of 16550 mAh g<sup>−1</sup> with an excellent initial Coulombic efficiency of 96.7 % and maintain a low overpotential of 1.42 V over 200 cycles at 300 mA g<sup>−1</sup>. This work provides a new research insight to design high-efficient and low-cost Li-CO<sub>2</sub> batteries with small overpotential and long-lifespan.</div></div>\",\"PeriodicalId\":377,\"journal\":{\"name\":\"Journal of Power Sources\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.1000,\"publicationDate\":\"2024-10-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Power Sources\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0378775324015441\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Power Sources","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378775324015441","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Highly efficient Li-CO2 batteries with regulated discharge product enabled by a hetero-structured N-C/Fe3C/Fe cathodic catalyst
Lithium carbon dioxide (Li-CO2) batteries have been regarded as a promising technology to alleviate the greenhouse effect and meet the demands for high-energy applications. However, the sluggish CO2 transformation kinetics and the Li2CO3-related parasitic reactions degrade the battery's performance. Herein, we introduce a heterostructure N-doped carbon combined Fe3C/Fe as a low-cost catalyst to regulate the formation of discharged product and accelerate the CO2 redox kinetics. Systematically experimental characterizations reveal that the as-designed heterostructure can control the discharge product as the amorphous form to reduce the polarization voltage, thereby improving the cycle stability and increasing the energy efficiency of the battery. As a result, the assembled Li-CO2 batteries exhibit a high full discharge capacity of 16550 mAh g−1 with an excellent initial Coulombic efficiency of 96.7 % and maintain a low overpotential of 1.42 V over 200 cycles at 300 mA g−1. This work provides a new research insight to design high-efficient and low-cost Li-CO2 batteries with small overpotential and long-lifespan.
期刊介绍:
The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells.
Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include:
• Portable electronics
• Electric and Hybrid Electric Vehicles
• Uninterruptible Power Supply (UPS) systems
• Storage of renewable energy
• Satellites and deep space probes
• Boats and ships, drones and aircrafts
• Wearable energy storage systems