{"title":"缺陷驱动的氧化作用使 V2CTx MXene 具有超长周期和高速率的水 K+ 存储能力","authors":"Yujing Liu, Qi Liu, Chengyao Zhao, Liping Liu, Zhongqiu Liu, Anguo Ying, Zhibin Pang, Xuping Sun, Pu Chen, Guang Chen","doi":"10.1002/adfm.202407497","DOIUrl":null,"url":null,"abstract":"Owing to the adverse influences of irreversible oxidation, the development of MXene‐based materials, especially those with satisfactory performance and longevity for aqueous energy storage, continues to suffer severe challenges. Herein, the strategy of targeted passivation‐supported defect‐lock‐oxygen is conceived, whereby engineered the V<jats:sub>2</jats:sub>CT<jats:sub>x</jats:sub> material for controllable partial oxidation with enhanced regioselectivity. When the material works, inside the intrinsic defects, the outward diffusion of oxidation is confined by the Lewis bases around the defects, which allows for the controllable progress of oxidation. The defect‐locked oxygen oxidizes the exposed carbon, thus forming sufficient amorphous carbons for enhancing the capacitive‐type adsorption of K‐ions. Then the oxidized defects enabled the fast kinetics via the cross‐layer transport of K‐ions. Benefiting from the strategy, the electrode assembly V<jats:sub>2</jats:sub>CT<jats:sub>x</jats:sub>‐RTIL (V<jats:sub>2</jats:sub>CT<jats:sub>x</jats:sub> equipped with room temperature ionic liquid) exhibits high capacity, good rate capability, and ultra‐longevity compared with those of the MXene materials so far reported. This work presents the first strategy of targeted passivation‐supported defect‐lock‐oxygen for high‐rate capability and super long‐cycling aqueous K<jats:sup>+</jats:sup> storage and hopefully would provide the inspiration for the future design of novel electrodes.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":null,"pages":null},"PeriodicalIF":18.5000,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Defect‐Driven Oxidation Enabled V2CTx MXene with Ultralong‐Cycling and High‐Rate Capability in Aqueous K+ Storage\",\"authors\":\"Yujing Liu, Qi Liu, Chengyao Zhao, Liping Liu, Zhongqiu Liu, Anguo Ying, Zhibin Pang, Xuping Sun, Pu Chen, Guang Chen\",\"doi\":\"10.1002/adfm.202407497\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Owing to the adverse influences of irreversible oxidation, the development of MXene‐based materials, especially those with satisfactory performance and longevity for aqueous energy storage, continues to suffer severe challenges. Herein, the strategy of targeted passivation‐supported defect‐lock‐oxygen is conceived, whereby engineered the V<jats:sub>2</jats:sub>CT<jats:sub>x</jats:sub> material for controllable partial oxidation with enhanced regioselectivity. When the material works, inside the intrinsic defects, the outward diffusion of oxidation is confined by the Lewis bases around the defects, which allows for the controllable progress of oxidation. The defect‐locked oxygen oxidizes the exposed carbon, thus forming sufficient amorphous carbons for enhancing the capacitive‐type adsorption of K‐ions. Then the oxidized defects enabled the fast kinetics via the cross‐layer transport of K‐ions. Benefiting from the strategy, the electrode assembly V<jats:sub>2</jats:sub>CT<jats:sub>x</jats:sub>‐RTIL (V<jats:sub>2</jats:sub>CT<jats:sub>x</jats:sub> equipped with room temperature ionic liquid) exhibits high capacity, good rate capability, and ultra‐longevity compared with those of the MXene materials so far reported. This work presents the first strategy of targeted passivation‐supported defect‐lock‐oxygen for high‐rate capability and super long‐cycling aqueous K<jats:sup>+</jats:sup> storage and hopefully would provide the inspiration for the future design of novel electrodes.\",\"PeriodicalId\":112,\"journal\":{\"name\":\"Advanced Functional Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":18.5000,\"publicationDate\":\"2024-07-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Functional Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1002/adfm.202407497\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Functional Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/adfm.202407497","RegionNum":1,"RegionCategory":"材料科学","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
由于不可逆氧化的不利影响,MXene 基材料的开发,尤其是那些性能和寿命令人满意的水性储能材料的开发,仍然面临严峻挑战。在此,我们构思了有针对性的钝化-支持缺陷-锁氧策略,从而设计出具有增强区域选择性的可控部分氧化的 V2CTx 材料。材料工作时,在固有缺陷内部,氧化的向外扩散受到缺陷周围路易斯碱的限制,从而实现了可控的氧化过程。被缺陷锁住的氧气会氧化暴露在外的碳,从而形成足够的无定形碳,以增强对 K 离子的电容式吸附。然后,氧化缺陷通过 K 离子的跨层传输实现了快速动力学。得益于这一策略,V2CTx-RTIL(配备室温离子液体的 V2CTx)电极组件与迄今报道的 MXene 材料相比,具有高容量、良好的速率能力和超长寿命。这项工作首次提出了定向钝化-支持缺陷-锁氧的策略,以实现高倍率能力和超长循环的水性 K+ 储存,希望能为未来新型电极的设计提供启发。
Defect‐Driven Oxidation Enabled V2CTx MXene with Ultralong‐Cycling and High‐Rate Capability in Aqueous K+ Storage
Owing to the adverse influences of irreversible oxidation, the development of MXene‐based materials, especially those with satisfactory performance and longevity for aqueous energy storage, continues to suffer severe challenges. Herein, the strategy of targeted passivation‐supported defect‐lock‐oxygen is conceived, whereby engineered the V2CTx material for controllable partial oxidation with enhanced regioselectivity. When the material works, inside the intrinsic defects, the outward diffusion of oxidation is confined by the Lewis bases around the defects, which allows for the controllable progress of oxidation. The defect‐locked oxygen oxidizes the exposed carbon, thus forming sufficient amorphous carbons for enhancing the capacitive‐type adsorption of K‐ions. Then the oxidized defects enabled the fast kinetics via the cross‐layer transport of K‐ions. Benefiting from the strategy, the electrode assembly V2CTx‐RTIL (V2CTx equipped with room temperature ionic liquid) exhibits high capacity, good rate capability, and ultra‐longevity compared with those of the MXene materials so far reported. This work presents the first strategy of targeted passivation‐supported defect‐lock‐oxygen for high‐rate capability and super long‐cycling aqueous K+ storage and hopefully would provide the inspiration for the future design of novel electrodes.
期刊介绍:
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