{"title":"Quantitative pre-intercalation of alkali metal ions enables precisely modulating Li+ storage of Mxenes","authors":"Junyan Li, Xin Ge, Qing Liang, Zizhun Wang, Wenjuan Han, Xinyan Zhou, Ming Lu, Wei Zhang, Weitao Zheng","doi":"10.1016/j.ensm.2024.103828","DOIUrl":null,"url":null,"abstract":"Ion intercalation is crucial for improving energy storage performance, but controlling the content of intercalated ions is challenging for two-dimensional (2D) electrode materials although it enables clarifying individual intercalation behaviors and thereof pinpointing the intercalation mechanism. Herein, the equal‐content alkali metal ions were successfully manipulated to intercalate into Mo<sub>2</sub>CT<em><sub>x</sub></em> MXene electrodes via an electrochemistry‐driven approach via the anti‐battery principle. Based on a variety of alkali metal ions pre‐intercalation into the Mo<sub>2</sub>CT<em><sub>x</sub></em> MXene (M<sup>+</sup>‐Mo<sub>2</sub>CT<em><sub>x</sub></em>) electrodes, the lithium storage performance was largely improved. Li<sup>+</sup>‐Mo<sub>2</sub>CT<em><sub>x</sub></em> electrode exhibits an outstanding capacity of 395.49 mAh g<sup>−1</sup> at 200 mA g<sup>−1</sup> after 100 cycles due to the enhanced redox activity induced by high-valence Mo and low-F interlayer exposed surface. Besides, the K<sup>+</sup>‐Mo<sub>2</sub>CT<em><sub>x</sub></em> electrode delivers excellent rate performance due to faster ion transfer kinetics originating from the pillaring effect of pre-intercalated K<sup>+</sup> ions. In a broader sense, our study opens up a new route to accurately improve the electrochemical performance via precisely tuning the content of ions intercalated into 2D intercalation‐type materials.","PeriodicalId":306,"journal":{"name":"Energy Storage Materials","volume":null,"pages":null},"PeriodicalIF":18.9000,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy Storage Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.ensm.2024.103828","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
Abstract
Ion intercalation is crucial for improving energy storage performance, but controlling the content of intercalated ions is challenging for two-dimensional (2D) electrode materials although it enables clarifying individual intercalation behaviors and thereof pinpointing the intercalation mechanism. Herein, the equal‐content alkali metal ions were successfully manipulated to intercalate into Mo2CTx MXene electrodes via an electrochemistry‐driven approach via the anti‐battery principle. Based on a variety of alkali metal ions pre‐intercalation into the Mo2CTx MXene (M+‐Mo2CTx) electrodes, the lithium storage performance was largely improved. Li+‐Mo2CTx electrode exhibits an outstanding capacity of 395.49 mAh g−1 at 200 mA g−1 after 100 cycles due to the enhanced redox activity induced by high-valence Mo and low-F interlayer exposed surface. Besides, the K+‐Mo2CTx electrode delivers excellent rate performance due to faster ion transfer kinetics originating from the pillaring effect of pre-intercalated K+ ions. In a broader sense, our study opens up a new route to accurately improve the electrochemical performance via precisely tuning the content of ions intercalated into 2D intercalation‐type materials.
期刊介绍:
Energy Storage Materials is a global interdisciplinary journal dedicated to sharing scientific and technological advancements in materials and devices for advanced energy storage and related energy conversion, such as in metal-O2 batteries. The journal features comprehensive research articles, including full papers and short communications, as well as authoritative feature articles and reviews by leading experts in the field.
Energy Storage Materials covers a wide range of topics, including the synthesis, fabrication, structure, properties, performance, and technological applications of energy storage materials. Additionally, the journal explores strategies, policies, and developments in the field of energy storage materials and devices for sustainable energy.
Published papers are selected based on their scientific and technological significance, their ability to provide valuable new knowledge, and their relevance to the international research community.