{"title":"超越浆料浇铸:对整体活性材料薄片进行图案化,以形成独立、无溶剂和低涡流的电池电极","authors":"","doi":"10.1016/j.xcrp.2024.102143","DOIUrl":null,"url":null,"abstract":"<p>Commercial lithium-ion battery electrodes today are manufactured by slurry casting active material powder onto a metal current collector foil. This manufacturing process has become embedded over recent decades but limits commercial cell performance. This paper presents patterning of a monolithic active material sheet as an alternative to slurry casting. The concept is proven experimentally by laser drilling a pyrolytic graphite sheet to increase the gravimetric active material capacity from 10 mA h g<sup>−1</sup> to 450 mA h g<sup>−1</sup>, when used as a negative lithium-intercalation electrode. Cell-level calculations show that, without changing the chemistry, a pyrolytic graphite sheet electrode with a hexagonal array of 5 μm diameter, 20 μm pitch channels could increase the gravimetric energy density of a LGM50 cell by 22% to 322 W h kg<sup>−1</sup>. By moving beyond slurry casting, patterned monolithic electrodes could enable batteries with lower cost, reduced energy intensity, and enhanced performance.</p>","PeriodicalId":9703,"journal":{"name":"Cell Reports Physical Science","volume":"65 1","pages":""},"PeriodicalIF":7.9000,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Beyond slurry cast: Patterning of a monolithic active material sheet to form free-standing, solvent-free, and low-tortuosity battery electrodes\",\"authors\":\"\",\"doi\":\"10.1016/j.xcrp.2024.102143\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Commercial lithium-ion battery electrodes today are manufactured by slurry casting active material powder onto a metal current collector foil. This manufacturing process has become embedded over recent decades but limits commercial cell performance. This paper presents patterning of a monolithic active material sheet as an alternative to slurry casting. The concept is proven experimentally by laser drilling a pyrolytic graphite sheet to increase the gravimetric active material capacity from 10 mA h g<sup>−1</sup> to 450 mA h g<sup>−1</sup>, when used as a negative lithium-intercalation electrode. Cell-level calculations show that, without changing the chemistry, a pyrolytic graphite sheet electrode with a hexagonal array of 5 μm diameter, 20 μm pitch channels could increase the gravimetric energy density of a LGM50 cell by 22% to 322 W h kg<sup>−1</sup>. By moving beyond slurry casting, patterned monolithic electrodes could enable batteries with lower cost, reduced energy intensity, and enhanced performance.</p>\",\"PeriodicalId\":9703,\"journal\":{\"name\":\"Cell Reports Physical Science\",\"volume\":\"65 1\",\"pages\":\"\"},\"PeriodicalIF\":7.9000,\"publicationDate\":\"2024-08-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Cell Reports Physical Science\",\"FirstCategoryId\":\"103\",\"ListUrlMain\":\"https://doi.org/10.1016/j.xcrp.2024.102143\",\"RegionNum\":2,\"RegionCategory\":\"综合性期刊\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cell Reports Physical Science","FirstCategoryId":"103","ListUrlMain":"https://doi.org/10.1016/j.xcrp.2024.102143","RegionNum":2,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
摘要
目前,商用锂离子电池电极的制造方法是将活性材料粉末浆状浇铸到金属集流箔上。近几十年来,这种制造工艺已成为嵌入式工艺,但却限制了商用电池的性能。本文介绍了整体活性材料片的图案化,作为浆料浇铸的替代方法。通过激光钻孔热解石墨片,实验证明了这一概念,在用作锂闰负极时,可将活性材料的重力容量从 10 mA h g-1 提高到 450 mA h g-1。电池级计算显示,在不改变化学成分的情况下,具有直径 5 μm、间距 20 μm 的六边形沟道阵列的热解石墨片电极可将 LGM50 电池的重力能量密度提高 22%,达到 322 W h kg-1。通过超越浆料浇铸技术,图案化单片电极可使电池成本更低、能量密度更低、性能更强。
Beyond slurry cast: Patterning of a monolithic active material sheet to form free-standing, solvent-free, and low-tortuosity battery electrodes
Commercial lithium-ion battery electrodes today are manufactured by slurry casting active material powder onto a metal current collector foil. This manufacturing process has become embedded over recent decades but limits commercial cell performance. This paper presents patterning of a monolithic active material sheet as an alternative to slurry casting. The concept is proven experimentally by laser drilling a pyrolytic graphite sheet to increase the gravimetric active material capacity from 10 mA h g−1 to 450 mA h g−1, when used as a negative lithium-intercalation electrode. Cell-level calculations show that, without changing the chemistry, a pyrolytic graphite sheet electrode with a hexagonal array of 5 μm diameter, 20 μm pitch channels could increase the gravimetric energy density of a LGM50 cell by 22% to 322 W h kg−1. By moving beyond slurry casting, patterned monolithic electrodes could enable batteries with lower cost, reduced energy intensity, and enhanced performance.
期刊介绍:
Cell Reports Physical Science, a premium open-access journal from Cell Press, features high-quality, cutting-edge research spanning the physical sciences. It serves as an open forum fostering collaboration among physical scientists while championing open science principles. Published works must signify significant advancements in fundamental insight or technological applications within fields such as chemistry, physics, materials science, energy science, engineering, and related interdisciplinary studies. In addition to longer articles, the journal considers impactful short-form reports and short reviews covering recent literature in emerging fields. Continually adapting to the evolving open science landscape, the journal reviews its policies to align with community consensus and best practices.