{"title":"Gelatin and sodium alginate derived carbon/silicon composites as high-performance anode materials for lithium-ion batteries","authors":"Liyang Lin, Mengjun Li, Ying Yan, Yuanhao Tian, Juan Qing, Susu Chen","doi":"10.1039/d4dt02623c","DOIUrl":null,"url":null,"abstract":"The volume expansion and poor conductivity greatly limit the application of silicon as an anode for lithium-ion batteries. Although nanocrystallization of silicon and its surface carbon coating can be improved to some extent, the serious problems of particle aggregation and structural instability have not been effectively solved. In this paper, gelatin and sodium alginate (GE+SA) derived carbon/silicon composites are successfully prepared by liquid-phase method, freeze-drying technique, and heat treatment. Si nanoparticles (NPs) are uniformly encapsulated in a three-dimensional network of N-doped carbon that is enriched with rich pore structure. The reversible capacity of the particular Si@C composite electrode was maintained at 580 mAh g−1 after 300 cycles at a current density of 1 A g−1, showing good cycling stability. Meanwhile, the anode also has excellent rate performance with reversible capacities of 2230, 1458, 1101, and 686.6 mAh g−1 at current densities of 0.1, 0.5, 1, and 2 A g−1, respectively. The GE+SA derived carbon/silicon composites effectively solve the problems of particle aggregation and unstable carbon/silicon interface structure, and can become one of the candidates for anode materials in lithium-ion batteries.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Dalton Transactions","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1039/d4dt02623c","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
The volume expansion and poor conductivity greatly limit the application of silicon as an anode for lithium-ion batteries. Although nanocrystallization of silicon and its surface carbon coating can be improved to some extent, the serious problems of particle aggregation and structural instability have not been effectively solved. In this paper, gelatin and sodium alginate (GE+SA) derived carbon/silicon composites are successfully prepared by liquid-phase method, freeze-drying technique, and heat treatment. Si nanoparticles (NPs) are uniformly encapsulated in a three-dimensional network of N-doped carbon that is enriched with rich pore structure. The reversible capacity of the particular Si@C composite electrode was maintained at 580 mAh g−1 after 300 cycles at a current density of 1 A g−1, showing good cycling stability. Meanwhile, the anode also has excellent rate performance with reversible capacities of 2230, 1458, 1101, and 686.6 mAh g−1 at current densities of 0.1, 0.5, 1, and 2 A g−1, respectively. The GE+SA derived carbon/silicon composites effectively solve the problems of particle aggregation and unstable carbon/silicon interface structure, and can become one of the candidates for anode materials in lithium-ion batteries.
期刊介绍:
Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.