Two-dimensional silicon suboxides nanostructures with Si nanodomains confined in amorphous SiO2 derived from siloxene as high performance anode for Li-ion batteries

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	Two-dimensional silicon suboxides nanostructures with Si nanodomains confined in amorphous SiO2 derived from siloxene as high performance anode for Li-ion batteries
	Fu, Rusheng; Zhang, Keli; Zaccaria, Remo Proietti; Huang, Heran; Xia, Yonggao; Liu, Zhaoping
刊名	NANO ENERGY
	2017
卷号	39 页码:546-553
ISSN号	2211-2855
英文摘要	SiOx owing to high reversible capacity and moderate volume expansion has been attracting a lot of attention as state-of-the-art anodes for the next generation of Li-ion batteries. However, poor cycling performance and poor rate capability, respectively associated with detrimental volume expansion and insulative amorphous SiO2, are still challenging issues which need to be addressed for the actual employment as anodes for Li-ion batteries. In this regard, here we design, synthesize, characterize and test carbon coated sheet-like SiO1.1 nanocomposites formed by Si-nanodomains confined inside amorphous SiO2 (nano-Si/a-SiO2). As a proof-of-concept, we achieve sheet-like SiOx nanocomposites via in-situ transformation of delaminated siloxene. In particular, self-prepared siloxene with oxygen-inserted Si-6 rings terminated with H and OH ligands is prepared by delamination of CaSi2 in dilute HCl. Importantly, the resulting carbon coated nano-Si/a-SiO2 material shows enhanced reaction kinetics and structural stability leading to 946 mAh g(-1) capacity at 0.15 A g(-1). Intriguingly, 38.0% (360 mAh g(-1)) of the maximum capacity is maintained even at 7.5 A g(-1), corresponding to a remarkable less than 3 min charge/discharge time. Finally, the electrode shows merely 24% of volume expansion and minor cracks with capacity retention of 92% after 300 cycles at 7.5 A g(-1).
公开日期	2017-12-25
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/13661]
专题	2017专题
推荐引用方式 GB/T 7714	Fu, Rusheng,Zhang, Keli,Zaccaria, Remo Proietti,et al. Two-dimensional silicon suboxides nanostructures with Si nanodomains confined in amorphous SiO2 derived from siloxene as high performance anode for Li-ion batteries[J]. NANO ENERGY,2017,39:546-553.
APA	Fu, Rusheng,Zhang, Keli,Zaccaria, Remo Proietti,Huang, Heran,Xia, Yonggao,&Liu, Zhaoping.(2017).Two-dimensional silicon suboxides nanostructures with Si nanodomains confined in amorphous SiO2 derived from siloxene as high performance anode for Li-ion batteries.NANO ENERGY,39,546-553.
MLA	Fu, Rusheng,et al."Two-dimensional silicon suboxides nanostructures with Si nanodomains confined in amorphous SiO2 derived from siloxene as high performance anode for Li-ion batteries".NANO ENERGY 39(2017):546-553.