Scalable synthesis of hierarchical porous Ge/rGO microspheres with an ultra-long cycling life for lithium storage

doi:10.1016/j.jpowsour.2018.06.024

	Scalable synthesis of hierarchical porous Ge/rGO microspheres with an ultra-long cycling life for lithium storage
	Wang, Bangrun 1; Jin, Jun ; Rui, Kun ; Zhu, Chenxi ; Wen, Zhaoyin
刊名	JOURNAL OF POWER SOURCES
	2018
卷号	396 页码:124
关键词	Lithium-ion batteries Anode materials Germanium Spray drying Hierarchical porous structure
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2018.06.024
英文摘要	The hierarchical porous germanium/reduced graphene oxide (Ge/rGO) microspheres are synthesized through an industrially scalable spray drying technique using commercial germanium dioxide (GeO2) as raw material. The Ge/rGO microspheres architecture with Ge nanoparticles homogeneously embedded in the three-dimensional (3D) interconnected conductive rGO network. When employed as anode for lithium ion batteries (LIBs), the as-obtained Ge/rGO microspheres exhibit excellent electrochemical performance with a high reversible capacity (811 mAh g(-1) after 1000 cycles), ultra-long cycling life (over 80% capacity retention from the 6th to 1000th cycles at 1 C), and high rate capability (380 mAh g(-1) at 20 C). In addition, the full cell consisting of Ge/rGO-2 anode and LiFePO4 cathode also delivers good cycling stability with high energy density. The 3D conductive rGO network provides the pathway for electron transportation and promotes to form stable solid electrolyte interphase (SEI) layer. Furthermore, the void space deduced from the porous structure can effectively accommodate volume changes and enhance the structural integrity of Ge/rGO microspheres. This facile and scalable synthetic strategy is beneficial for large-scale production of Ge-based electrode materials for further application in high energy and power density LIBs.
学科主题	Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000440876700016
资助机构	This work was financially supported from the National Natural Science Foundation of China (NSFC) project no. 51432010, JCKY2016130B010, and the Shanghai Engineering Research Center of Inorganic Energy Materials and Electric Power Sources no. 18DZ2280800, and the National Key R&D Program of China no. 2018YFB0905400. ; This work was financially supported from the National Natural Science Foundation of China (NSFC) project no. 51432010, JCKY2016130B010, and the Shanghai Engineering Research Center of Inorganic Energy Materials and Electric Power Sources no. 18DZ2280800, and the National Key R&D Program of China no. 2018YFB0905400.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/24708]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Chinese Acad Sci, Shanghai Inst Ceram, CAS Key Lab Mat Energy Convers, Shanghai 200050, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Bangrun,Jin, Jun,Rui, Kun,et al. Scalable synthesis of hierarchical porous Ge/rGO microspheres with an ultra-long cycling life for lithium storage[J]. JOURNAL OF POWER SOURCES,2018,396:124, 133.
APA	Wang, Bangrun,Jin, Jun,Rui, Kun,Zhu, Chenxi,&Wen, Zhaoyin.(2018).Scalable synthesis of hierarchical porous Ge/rGO microspheres with an ultra-long cycling life for lithium storage.JOURNAL OF POWER SOURCES,396,124.
MLA	Wang, Bangrun,et al."Scalable synthesis of hierarchical porous Ge/rGO microspheres with an ultra-long cycling life for lithium storage".JOURNAL OF POWER SOURCES 396(2018):124.