构建纳米尖晶石相和 Li+ 导电网络以增强超高镍阴极的电化学稳定性

IF 21.1 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Wenjin Huang , Yongjiang Sun , Guiquan Zhao , Qing Liu , Genfu Zhao , Lingyan Duan , Qi An , Futong Ren , Mengjiao Sun , Shubiao Xia , Hong Guo
{"title":"构建纳米尖晶石相和 Li+ 导电网络以增强超高镍阴极的电化学稳定性","authors":"Wenjin Huang ,&nbsp;Yongjiang Sun ,&nbsp;Guiquan Zhao ,&nbsp;Qing Liu ,&nbsp;Genfu Zhao ,&nbsp;Lingyan Duan ,&nbsp;Qi An ,&nbsp;Futong Ren ,&nbsp;Mengjiao Sun ,&nbsp;Shubiao Xia ,&nbsp;Hong Guo","doi":"10.1016/j.mattod.2024.08.002","DOIUrl":null,"url":null,"abstract":"<div><p>The tungsten with high oxidation states (W<sup>6+</sup>) had been proved to effectively improve the electrochemical performance of ultrahigh-nickel (Ni ≥ 90 %) cathode materials due to the unique microstructures. However, the exat location and underlying action mechanism of tungsten are still not well-understood, and there have been no reports on in-situ modification from bulk to surface simultaneously for these novel cathode materials. Here, a novel integrated strategy is proposed for in-situ modification of LiNi<sub>0.9</sub>Co<sub>0.09</sub>W<sub>0.01</sub>O<sub>2</sub> (NCW). Innovatively, the introduction of nano spinel phase and titanium pinned into the lattice further suppresses the anisotropic variation of unit cell and promotes the lithium-ion migration kinetics within the bulk. Additionally, the Li<sub>2</sub>TiO<sub>3</sub> conductive network enhances migration kinetics across interface and protects the active material against electrolyte erosion. Furthermore, the combination of in-situ analysis and DFT calculation reveals the ordered distribution of tungsten and the suppression effects of titanium on phase transition and cobalt redox. Consequently, the titanium-modified NCW exhibits significantly improved electrochemical performance, such as capacity retention of 93.0 % at 1C after 500 cycles in pouch-type full-cell, along with stable lattice oxygen during operation.</p></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"79 ","pages":"Pages 86-96"},"PeriodicalIF":21.1000,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Constructing nano spinel phase and Li+ conductive network to enhance the electrochemical stability of ultrahigh-Ni cathode\",\"authors\":\"Wenjin Huang ,&nbsp;Yongjiang Sun ,&nbsp;Guiquan Zhao ,&nbsp;Qing Liu ,&nbsp;Genfu Zhao ,&nbsp;Lingyan Duan ,&nbsp;Qi An ,&nbsp;Futong Ren ,&nbsp;Mengjiao Sun ,&nbsp;Shubiao Xia ,&nbsp;Hong Guo\",\"doi\":\"10.1016/j.mattod.2024.08.002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The tungsten with high oxidation states (W<sup>6+</sup>) had been proved to effectively improve the electrochemical performance of ultrahigh-nickel (Ni ≥ 90 %) cathode materials due to the unique microstructures. However, the exat location and underlying action mechanism of tungsten are still not well-understood, and there have been no reports on in-situ modification from bulk to surface simultaneously for these novel cathode materials. Here, a novel integrated strategy is proposed for in-situ modification of LiNi<sub>0.9</sub>Co<sub>0.09</sub>W<sub>0.01</sub>O<sub>2</sub> (NCW). Innovatively, the introduction of nano spinel phase and titanium pinned into the lattice further suppresses the anisotropic variation of unit cell and promotes the lithium-ion migration kinetics within the bulk. Additionally, the Li<sub>2</sub>TiO<sub>3</sub> conductive network enhances migration kinetics across interface and protects the active material against electrolyte erosion. Furthermore, the combination of in-situ analysis and DFT calculation reveals the ordered distribution of tungsten and the suppression effects of titanium on phase transition and cobalt redox. Consequently, the titanium-modified NCW exhibits significantly improved electrochemical performance, such as capacity retention of 93.0 % at 1C after 500 cycles in pouch-type full-cell, along with stable lattice oxygen during operation.</p></div>\",\"PeriodicalId\":387,\"journal\":{\"name\":\"Materials Today\",\"volume\":\"79 \",\"pages\":\"Pages 86-96\"},\"PeriodicalIF\":21.1000,\"publicationDate\":\"2024-08-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Today\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1369702124001585\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Today","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1369702124001585","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

摘要

高氧化态(W6+)的钨因其独特的微观结构而被证明能有效改善超高镍(镍≥ 90%)阴极材料的电化学性能。然而,钨的外在位置和潜在作用机制仍未得到很好的理解,也没有关于这些新型阴极材料从体表到表面同时进行原位改性的报道。在此,我们提出了一种新的原位改性 LiNi0.9Co0.09W0.01O2 (NCW) 的综合策略。通过创新性地在晶格中引入纳米尖晶石相和钉钛,进一步抑制了单胞的各向异性变化,促进了锂离子在体块内的迁移动力学。此外,Li2TiO3 导电网络增强了跨界面迁移动力学,并保护活性材料免受电解液侵蚀。此外,原位分析和 DFT 计算相结合,揭示了钨的有序分布以及钛对相变和钴氧化还原的抑制作用。因此,钛改性 NCW 的电化学性能得到了显著改善,例如在袋式全电池中循环 500 次后,1C 下的容量保持率达到 93.0%,同时在运行过程中晶格氧保持稳定。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Constructing nano spinel phase and Li+ conductive network to enhance the electrochemical stability of ultrahigh-Ni cathode

Constructing nano spinel phase and Li+ conductive network to enhance the electrochemical stability of ultrahigh-Ni cathode

The tungsten with high oxidation states (W6+) had been proved to effectively improve the electrochemical performance of ultrahigh-nickel (Ni ≥ 90 %) cathode materials due to the unique microstructures. However, the exat location and underlying action mechanism of tungsten are still not well-understood, and there have been no reports on in-situ modification from bulk to surface simultaneously for these novel cathode materials. Here, a novel integrated strategy is proposed for in-situ modification of LiNi0.9Co0.09W0.01O2 (NCW). Innovatively, the introduction of nano spinel phase and titanium pinned into the lattice further suppresses the anisotropic variation of unit cell and promotes the lithium-ion migration kinetics within the bulk. Additionally, the Li2TiO3 conductive network enhances migration kinetics across interface and protects the active material against electrolyte erosion. Furthermore, the combination of in-situ analysis and DFT calculation reveals the ordered distribution of tungsten and the suppression effects of titanium on phase transition and cobalt redox. Consequently, the titanium-modified NCW exhibits significantly improved electrochemical performance, such as capacity retention of 93.0 % at 1C after 500 cycles in pouch-type full-cell, along with stable lattice oxygen during operation.

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
Materials Today
Materials Today 工程技术-材料科学:综合
CiteScore
36.30
自引率
1.20%
发文量
237
审稿时长
23 days
期刊介绍: Materials Today is the leading journal in the Materials Today family, focusing on the latest and most impactful work in the materials science community. With a reputation for excellence in news and reviews, the journal has now expanded its coverage to include original research and aims to be at the forefront of the field. We welcome comprehensive articles, short communications, and review articles from established leaders in the rapidly evolving fields of materials science and related disciplines. We strive to provide authors with rigorous peer review, fast publication, and maximum exposure for their work. While we only accept the most significant manuscripts, our speedy evaluation process ensures that there are no unnecessary publication delays.
×
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
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
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 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信