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Supercritical fluid-assisted preparation of Si/CNTs@FG composites with hierarchical conductive networks as a high-performance anode material
Wang, Xiaoyang1,2; Wen, Kaihua1; Chen, Tianhua3; Chen, Shimou1,4; Zhang, Suojiang1
2020-08-30
Source PublicationAPPLIED SURFACE SCIENCE
ISSN0169-4332
Volume522Pages:8
AbstractConsidering the high theoretical specific capacity (4200 mAh/g), silicon is perceived as one of the most promising anode materials for lithium-ion battery, but the large volume change during the process of de/lithiation affects its cycle performance and practical application. With the assist of supercritical CO2 fluid (scCO(2)), graphite is exfoliated to folded graphite (FG) flakes. Meanwhile, the composite of Si/CNTs@FG with a hierarchical conductive network structure was constructed, where the silicon nanoparticles and carbon nanotubes (CNTs) were homogenously attached to the interlayer of FG. The hierarchical conductive network composed of FG and CNTs not only promotes the electrons transfer process but also relieves volume expansion stress of silicon. The Si/CNTs@FG exhibits remarkable Li storage performance, delivering high specific reversible capacity (1204 mAh/g at the current density of 0.2A/g), high capacity retention (970 mAh/g after 100 cycles) and excellent rate performance (635.2 mAh/g at 2 A/g). This study provides a facile and scalable approach to prepare a silicon-based anode material with excellent electrochemical performance.
KeywordSilicon anode Supercritical CO2 fluid Lithium-ion battery Anode
DOI10.1016/j.apsusc.2020.146507
Language英语
WOS KeywordLITHIUM-ION BATTERY ; POROUS SILICON ; ELECTROCHEMICAL PERFORMANCE ; GRAPHITE-ELECTRODES ; SI NANOPARTICLES ; LAYER GRAPHENE ; FEW-LAYER ; SURFACE ; CO2 ; NANOCOMPOSITES
Funding ProjectNational Key Projects for Fundamental Research and Development of China[2017YFB0102200] ; National Natural Science Foundation of China[51922099] ; National Natural Science Foundation of China[91534109] ; National Natural Science Foundation of China[21503006]
WOS Research AreaChemistry ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
Funding OrganizationNational Key Projects for Fundamental Research and Development of China ; National Natural Science Foundation of China
WOS IDWOS:000535690900002
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/40804
Collection中国科学院过程工程研究所
Corresponding AuthorChen, Shimou; Zhang, Suojiang
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Beijing Key Lab Ion Liquids Clean Proc, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Adelaide, Sch Chem Engn & Adv Mat, Adelaide, SA 5005, Australia
4.Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China
Recommended Citation
GB/T 7714
Wang, Xiaoyang,Wen, Kaihua,Chen, Tianhua,et al. Supercritical fluid-assisted preparation of Si/CNTs@FG composites with hierarchical conductive networks as a high-performance anode material[J]. APPLIED SURFACE SCIENCE,2020,522:8.
APA Wang, Xiaoyang,Wen, Kaihua,Chen, Tianhua,Chen, Shimou,&Zhang, Suojiang.(2020).Supercritical fluid-assisted preparation of Si/CNTs@FG composites with hierarchical conductive networks as a high-performance anode material.APPLIED SURFACE SCIENCE,522,8.
MLA Wang, Xiaoyang,et al."Supercritical fluid-assisted preparation of Si/CNTs@FG composites with hierarchical conductive networks as a high-performance anode material".APPLIED SURFACE SCIENCE 522(2020):8.
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