FigsharePub Date : 1753-01-01DOI: 10.1021/acsami.3c05708.s001
Mariam Baazizi (16852124), Mehdi Karbak (16852127), Mohamed Aqil (5646545), Simon Sayah (16852130), Mouad Dahbi (2094340), Fouad Ghamouss (1783945)
{"title":"High-Valence Surface-ModifiednLMO Cathode Materialsnfor Lithium-Ion Batteries: Diffusion Kinetics and Operando ThermalnStability Investigation","authors":"Mariam Baazizi (16852124), Mehdi Karbak (16852127), Mohamed Aqil (5646545), Simon Sayah (16852130), Mouad Dahbi (2094340), Fouad Ghamouss (1783945)","doi":"10.1021/acsami.3c05708.s001","DOIUrl":"https://doi.org/10.1021/acsami.3c05708.s001","url":null,"abstract":"Lithium manganese oxide (LiMn<sub>2</sub>O<sub>4</sub>) is a prevalentncathode material for lithium-ion batteries due to its low cost, abundantnmaterial sources, and ecofriendliness. However, its capacity fade,nlow energy density, and fast auto-discharge hinders its large-scalencommercialization. Consequently, scientists are urged to achieve high-performancenLMO cathodes through material doping and surface modification usingna wide range of transition metals, polymers, and carbon precursors.nFew studies have considered the potential of high-valence transitionnmetal oxides in stabilizing the LMO’s cycling process and enhancingnthe overall battery performance. In this work, we report the synthesisnof surface-modified lithium manganese oxide using high-valence tungstennoxide (W<sup>VI</sup>O<sub>3</sub>). Different WO<sub>3</sub> wt %nwere investigated before settling for 0.5%WO<sub>3</sub>-LMO as thensynergic surface-modified LMO. Using galvanostatic charge–discharge,n0.50 WO<sub>3</sub>-LMO exhibited better rate capability by retainingn51% of its initial capacity at a 20C rate, compared to 34% for thenpristine LMO. Furthermore, cyclic voltammetry at different scan ratesnshowed that 0.50 WO<sub>3</sub>-LMO possesses better ion diffusionnthan pristine LMO, around 10<sup>–11</sup> and 10<sup>–13</sup> cm<sup>2</sup>·s<sup>–1</sup> respectively. Finally,nusing in situ Raman spectroscopy, reaction mechanisms during cyclingnwere investigated, and operando accelerating rate calorimetry (ARC)nvisualized the surface-modified LMO’s cycling thermal stabilitynand highlighted its potential use for safe high-voltage lithium-ionnbatteries in automotive applications.","PeriodicalId":523698,"journal":{"name":"Figshare","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1753-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147920436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}