长循环寿命钠离子电池聚阴离子阴极键结构调控研究

IF 19.3 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2025-05-15 DOI:10.1021/acsenergylett.5c00769

Shuoshuo Cheng, Yibing Zhang, Peng Lv, Shiyu Li, Ying Bai

{"title":"长循环寿命钠离子电池聚阴离子阴极键结构调控研究","authors":"Shuoshuo Cheng, Yibing Zhang, Peng Lv, Shiyu Li, Ying Bai","doi":"10.1021/acsenergylett.5c00769","DOIUrl":null,"url":null,"abstract":"The NASICON-type Na4MnV(PO4)3 (NMVP) cathode is a potential candidate for sodium-ion batteries (SIBs) due to its intrinsic safety and cost advantages. However, its performance is limited by intrinsic low electronic conductivity and Jahn–Teller distortion of Mn. In this study, Co is substituted at the Mn site to take advantage of the stronger polarization effect of Co2+ and the ionic radius difference, which shortens the Mn–O bond length and strengthens its bonding, stabilizing the MnO6 octahedral structure. Furthermore, Co doping lowers the Na+ migration energy barrier and facilitates more efficient Na+ transport. Therefore, the prepared NMCVP-0.05 sample exhibits a stable cycling performance (retaining 88.9% after 3800 cycles at 10 C) and rate performance (71.7 mAh g–1 at 50 C). This work reveals the mechanism by which regulating the bond structure in NMVP affects sodium storage performance and proposes a stability-enhancing strategy for Mn-based polyanionic cathodes.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"129 1","pages":""},"PeriodicalIF":19.3000,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Regulating Bond Structure in Polyanion Cathode for Long-Cycle-Life Sodium-Ion Batteries\",\"authors\":\"Shuoshuo Cheng, Yibing Zhang, Peng Lv, Shiyu Li, Ying Bai\",\"doi\":\"10.1021/acsenergylett.5c00769\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The NASICON-type Na4MnV(PO4)3 (NMVP) cathode is a potential candidate for sodium-ion batteries (SIBs) due to its intrinsic safety and cost advantages. However, its performance is limited by intrinsic low electronic conductivity and Jahn–Teller distortion of Mn. In this study, Co is substituted at the Mn site to take advantage of the stronger polarization effect of Co2+ and the ionic radius difference, which shortens the Mn–O bond length and strengthens its bonding, stabilizing the MnO6 octahedral structure. Furthermore, Co doping lowers the Na+ migration energy barrier and facilitates more efficient Na+ transport. Therefore, the prepared NMCVP-0.05 sample exhibits a stable cycling performance (retaining 88.9% after 3800 cycles at 10 C) and rate performance (71.7 mAh g–1 at 50 C). This work reveals the mechanism by which regulating the bond structure in NMVP affects sodium storage performance and proposes a stability-enhancing strategy for Mn-based polyanionic cathodes.\",\"PeriodicalId\":16,\"journal\":{\"name\":\"ACS Energy Letters \",\"volume\":\"129 1\",\"pages\":\"\"},\"PeriodicalIF\":19.3000,\"publicationDate\":\"2025-05-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Energy Letters \",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1021/acsenergylett.5c00769\",\"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":"ACS Energy Letters ","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acsenergylett.5c00769","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

nasicon型Na4MnV(PO4)3 （NMVP）阴极由于其固有的安全性和成本优势而成为钠离子电池（sib）的潜在候选材料。然而，其性能受到Mn固有的低电子导电性和jann - teller畸变的限制。在本研究中，利用Co2+较强的极化效应和离子半径差，在Mn位上取代Co，缩短了Mn - o键的长度，加强了其成键，稳定了MnO6八面体结构。此外，Co掺杂降低了Na+迁移能垒，促进了Na+更有效的迁移。因此，制备的NMCVP-0.05样品具有稳定的循环性能（在10℃下循环3800次后保持88.9%）和倍率性能（在50℃下71.7 mAh g-1）。本研究揭示了调节NMVP中键结构影响钠存储性能的机制，并提出了一种增强mn基聚阴离子阴极稳定性的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Regulating Bond Structure in Polyanion Cathode for Long-Cycle-Life Sodium-Ion Batteries

查看原文本刊更多论文

Regulating Bond Structure in Polyanion Cathode for Long-Cycle-Life Sodium-Ion Batteries

The NASICON-type Na₄MnV(PO₄)₃ (NMVP) cathode is a potential candidate for sodium-ion batteries (SIBs) due to its intrinsic safety and cost advantages. However, its performance is limited by intrinsic low electronic conductivity and Jahn–Teller distortion of Mn. In this study, Co is substituted at the Mn site to take advantage of the stronger polarization effect of Co²⁺ and the ionic radius difference, which shortens the Mn–O bond length and strengthens its bonding, stabilizing the MnO₆ octahedral structure. Furthermore, Co doping lowers the Na⁺ migration energy barrier and facilitates more efficient Na⁺ transport. Therefore, the prepared NMCVP-0.05 sample exhibits a stable cycling performance (retaining 88.9% after 3800 cycles at 10 C) and rate performance (71.7 mAh g^–1 at 50 C). This work reveals the mechanism by which regulating the bond structure in NMVP affects sodium storage performance and proposes a stability-enhancing strategy for Mn-based polyanionic cathodes.

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

ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment

CiteScore

31.20

自引率

5.00%

发文量

469

审稿时长

1 months

期刊介绍： ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.