富锂层状氧化物在中度脱锂时的大量氧损耗和化学膨胀

IF 37.2 1区 材料科学 Q1 CHEMISTRY, PHYSICAL Nature Materials Pub Date : 2024-10-17 DOI:10.1038/s41563-024-02032-6
Peter M. Csernica, Kit McColl, Grace M. Busse, Kipil Lim, Diego F. Rivera, David A. Shapiro, M. Saiful Islam, William C. Chueh
{"title":"富锂层状氧化物在中度脱锂时的大量氧损耗和化学膨胀","authors":"Peter M. Csernica, Kit McColl, Grace M. Busse, Kipil Lim, Diego F. Rivera, David A. Shapiro, M. Saiful Islam, William C. Chueh","doi":"10.1038/s41563-024-02032-6","DOIUrl":null,"url":null,"abstract":"<p>Delithiation of layered oxide electrodes triggers irreversible oxygen loss, one of the primary degradation modes in lithium-ion batteries. However, the delithiation-dependent mechanisms of oxygen loss remain poorly understood. Here we investigate the oxygen non-stoichiometry in Li<sub>1.18–<i>x</i></sub>Ni<sub>0.21</sub>Mn<sub>0.53</sub>Co<sub>0.08</sub>O<sub>2–<i>δ</i></sub> electrodes as a function of Li content by using cycling protocols with long open-circuit voltage steps at varying states of charge. Surprisingly, we observe substantial oxygen loss even at moderate delithiation, corresponding to 2.5, 4.0 and 7.6 ml O<sub>2</sub> per gram of Li<sub>1.18–<i>x</i></sub>Ni<sub>0.21</sub>Mn<sub>0.53</sub>Co<sub>0.08</sub>O<sub>2–<i>δ</i></sub> after resting at upper capacity cut-offs of 135, 200 and 265 mAh g<sup>−1</sup> for 100 h. Our observations suggest an intrinsic oxygen instability consistent with predictions of high oxygen activity at intermediate potentials versus Li/Li<sup>+</sup>. In addition, we observe a large chemical expansion coefficient with respect to oxygen non-stoichiometry, which is about three times greater than those of classical oxygen-deficient materials such as fluorite and perovskite oxides. Our work challenges the conventional wisdom that deep delithiation is a necessary condition for oxygen loss in layered oxide electrodes and highlights the importance of calendar ageing for investigating oxygen stability.</p>","PeriodicalId":19058,"journal":{"name":"Nature Materials","volume":null,"pages":null},"PeriodicalIF":37.2000,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Substantial oxygen loss and chemical expansion in lithium-rich layered oxides at moderate delithiation\",\"authors\":\"Peter M. Csernica, Kit McColl, Grace M. Busse, Kipil Lim, Diego F. Rivera, David A. Shapiro, M. Saiful Islam, William C. Chueh\",\"doi\":\"10.1038/s41563-024-02032-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Delithiation of layered oxide electrodes triggers irreversible oxygen loss, one of the primary degradation modes in lithium-ion batteries. However, the delithiation-dependent mechanisms of oxygen loss remain poorly understood. Here we investigate the oxygen non-stoichiometry in Li<sub>1.18–<i>x</i></sub>Ni<sub>0.21</sub>Mn<sub>0.53</sub>Co<sub>0.08</sub>O<sub>2–<i>δ</i></sub> electrodes as a function of Li content by using cycling protocols with long open-circuit voltage steps at varying states of charge. Surprisingly, we observe substantial oxygen loss even at moderate delithiation, corresponding to 2.5, 4.0 and 7.6 ml O<sub>2</sub> per gram of Li<sub>1.18–<i>x</i></sub>Ni<sub>0.21</sub>Mn<sub>0.53</sub>Co<sub>0.08</sub>O<sub>2–<i>δ</i></sub> after resting at upper capacity cut-offs of 135, 200 and 265 mAh g<sup>−1</sup> for 100 h. Our observations suggest an intrinsic oxygen instability consistent with predictions of high oxygen activity at intermediate potentials versus Li/Li<sup>+</sup>. In addition, we observe a large chemical expansion coefficient with respect to oxygen non-stoichiometry, which is about three times greater than those of classical oxygen-deficient materials such as fluorite and perovskite oxides. Our work challenges the conventional wisdom that deep delithiation is a necessary condition for oxygen loss in layered oxide electrodes and highlights the importance of calendar ageing for investigating oxygen stability.</p>\",\"PeriodicalId\":19058,\"journal\":{\"name\":\"Nature Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":37.2000,\"publicationDate\":\"2024-10-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nature Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1038/s41563-024-02032-6\",\"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":"Nature Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1038/s41563-024-02032-6","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

层状氧化物电极的脱ithiation 会引发不可逆的氧损耗,这是锂离子电池的主要降解模式之一。然而,人们对依赖于脱锂的氧损耗机制仍然知之甚少。在此,我们通过在不同充电状态下使用长开路电压阶跃的循环协议,研究了 Li1.18-xNi0.21Mn0.53Co0.08O2-δ 电极中的氧非化学计量与锂含量的关系。令人惊讶的是,我们观察到即使在适度脱硫的情况下也有大量氧气流失,在 135、200 和 265 mAh g-1 的上限容量截止点静置 100 小时后,每克 Li1.18-xNi0.21Mn0.53Co0.08O2-δ中的氧气含量分别为 2.5、4.0 和 7.6 毫升。此外,我们还观察到与氧非化学计量有关的巨大化学膨胀系数,该系数约为经典缺氧材料(如萤石和过氧化物氧化物)的三倍。我们的研究挑战了传统观点,即深度脱硫是层状氧化物电极中氧损失的必要条件,并强调了日历老化对研究氧稳定性的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

摘要图片

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Substantial oxygen loss and chemical expansion in lithium-rich layered oxides at moderate delithiation

Delithiation of layered oxide electrodes triggers irreversible oxygen loss, one of the primary degradation modes in lithium-ion batteries. However, the delithiation-dependent mechanisms of oxygen loss remain poorly understood. Here we investigate the oxygen non-stoichiometry in Li1.18–xNi0.21Mn0.53Co0.08O2–δ electrodes as a function of Li content by using cycling protocols with long open-circuit voltage steps at varying states of charge. Surprisingly, we observe substantial oxygen loss even at moderate delithiation, corresponding to 2.5, 4.0 and 7.6 ml O2 per gram of Li1.18–xNi0.21Mn0.53Co0.08O2–δ after resting at upper capacity cut-offs of 135, 200 and 265 mAh g−1 for 100 h. Our observations suggest an intrinsic oxygen instability consistent with predictions of high oxygen activity at intermediate potentials versus Li/Li+. In addition, we observe a large chemical expansion coefficient with respect to oxygen non-stoichiometry, which is about three times greater than those of classical oxygen-deficient materials such as fluorite and perovskite oxides. Our work challenges the conventional wisdom that deep delithiation is a necessary condition for oxygen loss in layered oxide electrodes and highlights the importance of calendar ageing for investigating oxygen stability.

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
Nature Materials
Nature Materials 工程技术-材料科学:综合
CiteScore
62.20
自引率
0.70%
发文量
221
审稿时长
3.2 months
期刊介绍: Nature Materials is a monthly multi-disciplinary journal aimed at bringing together cutting-edge research across the entire spectrum of materials science and engineering. It covers all applied and fundamental aspects of the synthesis/processing, structure/composition, properties, and performance of materials. The journal recognizes that materials research has an increasing impact on classical disciplines such as physics, chemistry, and biology. Additionally, Nature Materials provides a forum for the development of a common identity among materials scientists and encourages interdisciplinary collaboration. It takes an integrated and balanced approach to all areas of materials research, fostering the exchange of ideas between scientists involved in different disciplines. Nature Materials is an invaluable resource for scientists in academia and industry who are active in discovering and developing materials and materials-related concepts. It offers engaging and informative papers of exceptional significance and quality, with the aim of influencing the development of society in the future.
期刊最新文献
Cell tumbling enhances stem cell differentiation in hydrogels via nuclear mechanotransduction Author Correction: Pentagonal two-dimensional lattices Direct laser 3D nanowriting of metals and their alloys Extracellular vesicle gatekeepers for tumours Demonstration of efficient Thomson cooler by electronic phase transition
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1