The silicon-carbon nanofibers-carbonized yeast powder composites with excellent electrochemical properties as lithium-ion anode materials

doi:10.1142/S0217979221501289

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	The silicon-carbon nanofibers-carbonized yeast powder composites with excellent electrochemical properties as lithium-ion anode materials
	Dai, Jianfeng 1; Shi, Xiangyu 1; Wang, Qing 1; Li, Weixue 1; Yu, Yongbo 1; Jiang, Yi 2
刊名	INTERNATIONAL JOURNAL OF MODERN PHYSICS B
	2021-04-10
卷号	35 期号:9
关键词	Silicon-carbon nanofibers electrical impedance electrical conductivity biomass porous carbon
ISSN号	0217-9792
DOI	10.1142/S0217979221501289
英文摘要	Silicon{carbon nanofibers-carbonized yeast powder composite (SCNFs/CYP) was fabricated using the electrostatic spinning and hydrothermal processes. Experimental results show that the carbon nanofibers can restrain the volume expansion of silicon in the electrochemical process and the microporous structure of carbonized yeast powder can increase the specific surface area and promote the penetration of electrolyte. The compound was cyclically tested at charge-discharge rate of 0.5 degrees C, and the first charge/discharge capacity was 1725 and 1732 mAh/g. Although it is lower than the capacity of single structure silicon{carbon nanofibers (SCNFs), with the increase of the number of cycles, the capacity of charging and discharging has been greatly improved, and it can be maintained at 1656 mAh/g after 180 cycles. The R-CT after 1 cycle, 10 cycles and 100 cycles were 486, 286.5 and 231 Omega, from which we can see that the SCNFs-CYP has lower overall impedance values as the cycle increases. This indicated that the addition of carbon nanofibers and carbonized yeast powder inhibited the volume expansion and increased the specific surface area, providing more electrical contact sites.
WOS研究方向	Physics
语种	英语
出版者	WORLD SCIENTIFIC PUBL CO PTE LTD
WOS记录号	WOS:000670290000008
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148809]
专题	理学院能源与动力工程学院
作者单位	1.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Gansu, Peoples R China; 2.Changchun Inst Technol, Sch Sci, Changchun 130012, Jilin, Peoples R China
推荐引用方式 GB/T 7714	Dai, Jianfeng,Shi, Xiangyu,Wang, Qing,et al. The silicon-carbon nanofibers-carbonized yeast powder composites with excellent electrochemical properties as lithium-ion anode materials[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS B,2021,35(9).
APA	Dai, Jianfeng,Shi, Xiangyu,Wang, Qing,Li, Weixue,Yu, Yongbo,&Jiang, Yi.(2021).The silicon-carbon nanofibers-carbonized yeast powder composites with excellent electrochemical properties as lithium-ion anode materials.INTERNATIONAL JOURNAL OF MODERN PHYSICS B,35(9).
MLA	Dai, Jianfeng,et al."The silicon-carbon nanofibers-carbonized yeast powder composites with excellent electrochemical properties as lithium-ion anode materials".INTERNATIONAL JOURNAL OF MODERN PHYSICS B 35.9(2021).