influenceofcarboncoatingontheelectrochemicalperformanceofsiocgraphitecompositeanodematerials

	influenceofcarboncoatingontheelectrochemicalperformanceofsiocgraphitecompositeanodematerials
	Lu Hao 4; Wang Junyang 4; Liu Bonan 3; Chu Geng 2; Zhou Ge 4; Luo Fei 1; Zheng Jieyun 4; Yu Xiqian 4; Li Hong 4
刊名	chinesephysicsb
	2019
卷号	28 期号:6
ISSN号	1674-1056
英文摘要	Silicon monoxide (SiO) has been considered as one of the most promising anode materials for next generation highenergy- density Li-ion batteries (LiBs) thanks to its high theoretical capacity. However, the poor intrinsic electronic conductivity and large volume change during lithium intercalation/de-intercalation restrict its practical applications. Fabrication of SiO/C composites is an effective way to overcome these problems. Herein, a series of micro-sized SiO@C/graphite (SiO@C/G) composite anode materials, with designed capacity of 600 mAh·g~(–1), are successfully prepared through a pitch pyrolysis reaction method. The electrochemical performance of SiO@C/G composite anodes with different carbon coating contents of 5 wt%, 10 wt%, 15 wt%, and 35 wt% is investigated. The results show that the SiO@C/G composite with 15-wt% carbon coating content exhibits the best cycle performance, with a high capacity retention of 90.7% at 25 °C and 90.1% at 45 °C after 100 cycles in full cells with LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2 as cathodes. The scanning electron microscope (SEM) and electrochemistry impedance spectroscopy (EIS) results suggest that a moderate carbon coating layer can promote the formation of stable SEI film, which is favorable for maintaining good interfacial conductivity and thus enhancing the cycling stability of SiO electrode.
语种	英语
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/37152]
专题	中国科学院过程工程研究所
作者单位	1.Tianmulake Excellent Anode Materials Co., Ltd. 2.中国科学院过程工程研究所 3.中国科学院化学研究所 4.中国科学院物理研究所
推荐引用方式 GB/T 7714	Lu Hao,Wang Junyang,Liu Bonan,et al. influenceofcarboncoatingontheelectrochemicalperformanceofsiocgraphitecompositeanodematerials[J]. chinesephysicsb,2019,28(6).
APA	Lu Hao.,Wang Junyang.,Liu Bonan.,Chu Geng.,Zhou Ge.,...&Li Hong.(2019).influenceofcarboncoatingontheelectrochemicalperformanceofsiocgraphitecompositeanodematerials.chinesephysicsb,28(6).
MLA	Lu Hao,et al."influenceofcarboncoatingontheelectrochemicalperformanceofsiocgraphitecompositeanodematerials".chinesephysicsb 28.6(2019).