{"title":"Facile preparation of silicon/carbon anode derived from macroporous methylsilsesquioxane for lithium-ion batteries","authors":"Yunpeng Shan, Jiaqi Shan, Junzhang Wang, Zhou Xu, Xingzhong Guo","doi":"10.1007/s10971-024-06563-x","DOIUrl":null,"url":null,"abstract":"<div><p>Silicon/carbon (Si/C) anode materials were fabricated by an improved magnesiothermic reduction of macroporous methylsilsesquioxane (MSQ) as the precursor, followed by a carbon filling. The macroporous MSQ is reduced to macroporous silicon, and the pitch and graphite are filled into the pore structure of silicon via the impregnation and carbonization to prepare Si/C anode materials. The obtained Si/C anodes exhibit superior comprehensive electrochemical performance with a high initial charge and discharge capacity of 1437.0 and 1180.6 mAh g<sup>−1</sup> at a current density of 300 mA g<sup>−1</sup> and a remarkable initial coulombic efficiency of 82.16%. This work provides a facile approach for the preparation of anodes for lithium-ion batteries.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 1","pages":"39 - 47"},"PeriodicalIF":2.3000,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sol-Gel Science and Technology","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10971-024-06563-x","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
引用次数: 0
Abstract
Silicon/carbon (Si/C) anode materials were fabricated by an improved magnesiothermic reduction of macroporous methylsilsesquioxane (MSQ) as the precursor, followed by a carbon filling. The macroporous MSQ is reduced to macroporous silicon, and the pitch and graphite are filled into the pore structure of silicon via the impregnation and carbonization to prepare Si/C anode materials. The obtained Si/C anodes exhibit superior comprehensive electrochemical performance with a high initial charge and discharge capacity of 1437.0 and 1180.6 mAh g−1 at a current density of 300 mA g−1 and a remarkable initial coulombic efficiency of 82.16%. This work provides a facile approach for the preparation of anodes for lithium-ion batteries.
以大孔甲基硅氧烷（MSQ）为前驱体，采用改进的镁热还原法制备了硅/碳（Si/C）负极材料。将大孔MSQ还原为大孔硅，将沥青和石墨通过浸渍和碳化填充到硅的孔隙结构中，制备Si/C负极材料。所制备的Si/C阳极具有优异的综合电化学性能，在电流密度为300 mA g - 1时初始充放电容量分别为1437.0和1180.6 mAh g - 1，初始库仑效率为82.16%。这项工作为锂离子电池阳极的制备提供了一种简便的方法。图形抽象
期刊介绍：
The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.
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