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Scalable synthesis of porous silicon/carbon microspheres as improved anode materials for Li-ion batteries
Alternative TitleRSC Adv.
Zhang, Lei1,2; Wang, Yanhong1; Kan, Guangwei1; Zhang, Zailei1; Wang, Cunguo2; Zhong, Ziyi3; Su, Fabing1
2014
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume4Issue:81Pages:43114-43120
AbstractWe report the scalable synthesis of porous Si/C microspheres (PSCMs) by a spray drying process using carbon black (CB) or graphitized carbon black (GCB) nanoparticles as the primary carbon source, Si nanoparticles as the active additive, and sucrose as the binder, followed by a heat treatment at 900 degrees C. The samples were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, nitrogen adsorption, thermogravimetric analysis, and Raman spectroscopy. It was found that the PSCMs have a particle size range of 5-20 mu m, and those composed of GCB and 5 wt% Si nanoparticles (named GCBSi5) display improved electrochemical performance. As can be observed, GCBSi5 delivered a reversible capacity of 483 mA h g(-1) at the current density of 50 mA g(-1) after 100 cycles, which is much higher than that of the commercial graphite microspheres (GMs; 344 mA h g(-1)). More importantly, GCBSi5 exhibited excellent rate performance, for example, its capacity is around 435 and 380 mA h g(-1) at the current densities of 500 and 1000 mA g(-1), respectively, which is much higher than those of GMs (200 and 100 mA h g(-1)). These enhanced electrochemical properties should correlate with its porous structure that can significantly suppress the aggregation and volume expansion/contraction of the Si nanoparticles and speed up Li ion diffusion. In addition, the introduction of GCB and carbon matrix interconnected with hard carbon derived from sucrose can enhance the electronic conductivity. This work demonstrates the feasibility of the large-scale and low-cost production of Si/C anode composites for Li-ion batteries.; We report the scalable synthesis of porous Si/C microspheres (PSCMs) by a spray drying process using carbon black (CB) or graphitized carbon black (GCB) nanoparticles as the primary carbon source, Si nanoparticles as the active additive, and sucrose as the binder, followed by a heat treatment at 900 degrees C. The samples were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, nitrogen adsorption, thermogravimetric analysis, and Raman spectroscopy. It was found that the PSCMs have a particle size range of 5-20 mu m, and those composed of GCB and 5 wt% Si nanoparticles (named GCBSi5) display improved electrochemical performance. As can be observed, GCBSi5 delivered a reversible capacity of 483 mA h g(-1) at the current density of 50 mA g(-1) after 100 cycles, which is much higher than that of the commercial graphite microspheres (GMs; 344 mA h g(-1)). More importantly, GCBSi5 exhibited excellent rate performance, for example, its capacity is around 435 and 380 mA h g(-1) at the current densities of 500 and 1000 mA g(-1), respectively, which is much higher than those of GMs (200 and 100 mA h g(-1)). These enhanced electrochemical properties should correlate with its porous structure that can significantly suppress the aggregation and volume expansion/contraction of the Si nanoparticles and speed up Li ion diffusion. In addition, the introduction of GCB and carbon matrix interconnected with hard carbon derived from sucrose can enhance the electronic conductivity. This work demonstrates the feasibility of the large-scale and low-cost production of Si/C anode composites for Li-ion batteries.
KeywordSilicon/disordered Carbon Nanocomposites Composite Anode Mesocarbon Microbeads Lithium Performance Nanoparticles Si Nanotubes Storage Spherules
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c4ra04997g
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSILICON/DISORDERED CARBON NANOCOMPOSITES ; COMPOSITE ANODE ; MESOCARBON MICROBEADS ; LITHIUM ; PERFORMANCE ; NANOPARTICLES ; SI ; NANOTUBES ; STORAGE ; SPHERULES
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000344525500048
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11891
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Qingdao Univ Sci & Technol, Minist Educ, Key Lab Rubber Plast, Qingdao 261500, Peoples R China
3.ASTAR, Inst Chem Engn & Sci, Singapore 627833, Singapore
Recommended Citation
GB/T 7714
Zhang, Lei,Wang, Yanhong,Kan, Guangwei,et al. Scalable synthesis of porous silicon/carbon microspheres as improved anode materials for Li-ion batteries[J]. RSC ADVANCES,2014,4(81):43114-43120.
APA Zhang, Lei.,Wang, Yanhong.,Kan, Guangwei.,Zhang, Zailei.,Wang, Cunguo.,...&Su, Fabing.(2014).Scalable synthesis of porous silicon/carbon microspheres as improved anode materials for Li-ion batteries.RSC ADVANCES,4(81),43114-43120.
MLA Zhang, Lei,et al."Scalable synthesis of porous silicon/carbon microspheres as improved anode materials for Li-ion batteries".RSC ADVANCES 4.81(2014):43114-43120.
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