{"title":"通过滚压技术整合碳纳米管,增强锂离子电池中锡箔阳极的性能","authors":"","doi":"10.1016/j.jpowsour.2024.235597","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, we propose the use of multi-walled carbon nanotubes (MWCNTs) combinded with accumulative roll bonding technique to enhance the performance of Sn foils as anodes in lithium-ion batteries. Increasing the amount of CNTs reduces the grain size of Sn, which leads to an increase in hardness. As the CNT content increases from 0 to 2.2 wt%, several electrochemical improvements are observed: decreased nucleation overpotential, enhanced Coulombic efficiency, reduced overpotential, lowered charge transfer resistance, and increased lithium-ion diffusivity. These combined effects synergistically enhance the capacity of the anode. The benefits of incorporating CNTs into Sn can be attributed to two main factors: (1) the increased grain boundaries, dislocations, and CNTs provide more active sites for (de)lithiation and facilitate faster lithium-ion diffusion paths; (2) the improved strength resulting from grain refinement and CNT reinforcements helps maintain structural integrity during the formation and growth of high-density pores over multiple cycles. Although the addition of CNTs enhances capacity up to a content of 0.9 wt%, further additions result in a stagnation in capacity enhancement. Furthermore, when the CNT content exceeds 0.6 wt%, cyclic life, capacity retention, and rate capabilities significantly decline due to increased CNT agglomeration.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhancing tin foil anodes in lithium-ion batteries through carbon nanotube integration via rolling technique\",\"authors\":\"\",\"doi\":\"10.1016/j.jpowsour.2024.235597\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>In this study, we propose the use of multi-walled carbon nanotubes (MWCNTs) combinded with accumulative roll bonding technique to enhance the performance of Sn foils as anodes in lithium-ion batteries. Increasing the amount of CNTs reduces the grain size of Sn, which leads to an increase in hardness. As the CNT content increases from 0 to 2.2 wt%, several electrochemical improvements are observed: decreased nucleation overpotential, enhanced Coulombic efficiency, reduced overpotential, lowered charge transfer resistance, and increased lithium-ion diffusivity. These combined effects synergistically enhance the capacity of the anode. The benefits of incorporating CNTs into Sn can be attributed to two main factors: (1) the increased grain boundaries, dislocations, and CNTs provide more active sites for (de)lithiation and facilitate faster lithium-ion diffusion paths; (2) the improved strength resulting from grain refinement and CNT reinforcements helps maintain structural integrity during the formation and growth of high-density pores over multiple cycles. Although the addition of CNTs enhances capacity up to a content of 0.9 wt%, further additions result in a stagnation in capacity enhancement. Furthermore, when the CNT content exceeds 0.6 wt%, cyclic life, capacity retention, and rate capabilities significantly decline due to increased CNT agglomeration.</div></div>\",\"PeriodicalId\":377,\"journal\":{\"name\":\"Journal of Power Sources\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.1000,\"publicationDate\":\"2024-10-15\",\"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/S0378775324015490\",\"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/S0378775324015490","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}
Enhancing tin foil anodes in lithium-ion batteries through carbon nanotube integration via rolling technique
In this study, we propose the use of multi-walled carbon nanotubes (MWCNTs) combinded with accumulative roll bonding technique to enhance the performance of Sn foils as anodes in lithium-ion batteries. Increasing the amount of CNTs reduces the grain size of Sn, which leads to an increase in hardness. As the CNT content increases from 0 to 2.2 wt%, several electrochemical improvements are observed: decreased nucleation overpotential, enhanced Coulombic efficiency, reduced overpotential, lowered charge transfer resistance, and increased lithium-ion diffusivity. These combined effects synergistically enhance the capacity of the anode. The benefits of incorporating CNTs into Sn can be attributed to two main factors: (1) the increased grain boundaries, dislocations, and CNTs provide more active sites for (de)lithiation and facilitate faster lithium-ion diffusion paths; (2) the improved strength resulting from grain refinement and CNT reinforcements helps maintain structural integrity during the formation and growth of high-density pores over multiple cycles. Although the addition of CNTs enhances capacity up to a content of 0.9 wt%, further additions result in a stagnation in capacity enhancement. Furthermore, when the CNT content exceeds 0.6 wt%, cyclic life, capacity retention, and rate capabilities significantly decline due to increased CNT agglomeration.
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