{"title":"利用可机械变形的成核界面实现高稳定性无阳极钠电池","authors":"Weimin Jiao, Shervin Alaei, Jayanth Ramamurthy, Mihir Ojha, Bella Guyll, Cary L. Pint","doi":"10.1016/j.ensm.2024.103784","DOIUrl":null,"url":null,"abstract":"<p>Anode-free sodium metal batteries (AFNMBs) with zero excess sodium offer superior energy density, lower cell cost, and design practicality for next-generation EVs and other applications. However, reaching consistent high Coulombic efficiency (CE) greater than 99.9% remains a challenge for this battery architecture. In this study, our findings support that using a soft Li metal interface under a current collector coated with a thin carbon black nucleation layer facilitates extremely stable nucleation and growth of Na metal by locally distributing pressure to mitigate SEI or dead sodium formation. Specifically, our findings demonstrate Na half cells with stable CE of 99.98% over 500 cycles at 0.5 mA/cm<sup>2</sup>. Further, zero-excess sodium full cell AFNMBs with Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> cathodes exhibit total first cycle formation loss of only 5.4% at C/10 rates, which is over two times lower than commercial Li-ion cells, with capacity retention of 97.4% after 100 cycles at 0.5 mA cm<sup>-2</sup> (∼ C/3) and average round-trip energy efficiency of 99.97%.</p>","PeriodicalId":306,"journal":{"name":"Energy Storage Materials","volume":null,"pages":null},"PeriodicalIF":18.9000,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Highly Stable Anode-free Sodium Batteries Enabled by Mechanically Deformable Nucleation Interface\",\"authors\":\"Weimin Jiao, Shervin Alaei, Jayanth Ramamurthy, Mihir Ojha, Bella Guyll, Cary L. Pint\",\"doi\":\"10.1016/j.ensm.2024.103784\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Anode-free sodium metal batteries (AFNMBs) with zero excess sodium offer superior energy density, lower cell cost, and design practicality for next-generation EVs and other applications. However, reaching consistent high Coulombic efficiency (CE) greater than 99.9% remains a challenge for this battery architecture. In this study, our findings support that using a soft Li metal interface under a current collector coated with a thin carbon black nucleation layer facilitates extremely stable nucleation and growth of Na metal by locally distributing pressure to mitigate SEI or dead sodium formation. Specifically, our findings demonstrate Na half cells with stable CE of 99.98% over 500 cycles at 0.5 mA/cm<sup>2</sup>. Further, zero-excess sodium full cell AFNMBs with Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> cathodes exhibit total first cycle formation loss of only 5.4% at C/10 rates, which is over two times lower than commercial Li-ion cells, with capacity retention of 97.4% after 100 cycles at 0.5 mA cm<sup>-2</sup> (∼ C/3) and average round-trip energy efficiency of 99.97%.</p>\",\"PeriodicalId\":306,\"journal\":{\"name\":\"Energy Storage Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":18.9000,\"publicationDate\":\"2024-09-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Energy Storage Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1016/j.ensm.2024.103784\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy Storage Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.ensm.2024.103784","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
摘要
零过量钠的无阳极钠金属电池(AFNMB)具有卓越的能量密度、较低的电池成本和设计实用性,适用于下一代电动汽车和其他应用。然而,要达到高于 99.9% 的库仑效率(CE)仍然是这种电池结构面临的挑战。在这项研究中,我们的研究结果证明,在涂有薄碳黑成核层的集流器下使用软锂离子金属界面,可以通过局部分散压力来减轻 SEI 或死钠的形成,从而促进 Na 金属极其稳定的成核和生长。具体来说,我们的研究结果表明,在 0.5 mA/cm2 的条件下,Na 半电池在 500 个循环中的 CE 稳定度为 99.98%。此外,采用 Na3V2(PO4)3 阴极的零过量钠全电池 AFNMB 在 C/10 速率下的第一周期形成总损失仅为 5.4%,比商用锂离子电池低两倍多,在 0.5 mA cm-2 (∼ C/3)条件下循环 100 次后容量保持率为 97.4%,平均往返能量效率为 99.97%。
Anode-free sodium metal batteries (AFNMBs) with zero excess sodium offer superior energy density, lower cell cost, and design practicality for next-generation EVs and other applications. However, reaching consistent high Coulombic efficiency (CE) greater than 99.9% remains a challenge for this battery architecture. In this study, our findings support that using a soft Li metal interface under a current collector coated with a thin carbon black nucleation layer facilitates extremely stable nucleation and growth of Na metal by locally distributing pressure to mitigate SEI or dead sodium formation. Specifically, our findings demonstrate Na half cells with stable CE of 99.98% over 500 cycles at 0.5 mA/cm2. Further, zero-excess sodium full cell AFNMBs with Na3V2(PO4)3 cathodes exhibit total first cycle formation loss of only 5.4% at C/10 rates, which is over two times lower than commercial Li-ion cells, with capacity retention of 97.4% after 100 cycles at 0.5 mA cm-2 (∼ C/3) and average round-trip energy efficiency of 99.97%.
期刊介绍:
Energy Storage Materials is a global interdisciplinary journal dedicated to sharing scientific and technological advancements in materials and devices for advanced energy storage and related energy conversion, such as in metal-O2 batteries. The journal features comprehensive research articles, including full papers and short communications, as well as authoritative feature articles and reviews by leading experts in the field.
Energy Storage Materials covers a wide range of topics, including the synthesis, fabrication, structure, properties, performance, and technological applications of energy storage materials. Additionally, the journal explores strategies, policies, and developments in the field of energy storage materials and devices for sustainable energy.
Published papers are selected based on their scientific and technological significance, their ability to provide valuable new knowledge, and their relevance to the international research community.