Improving the rate and low-temperature performance of LiFePO4 by tailoring the form of carbon coating from amorphous to graphene-like

doi:10.1007/s10008-017-3777-y

	Improving the rate and low-temperature performance of LiFePO4 by tailoring the form of carbon coating from amorphous to graphene-like
	Hu, Qiao ; Liao, Jia-Ying ; Zou, Bang-Kun ; Yu, Mu-Fan ; Tang, Zhong-Feng ; Wen, Zhao-Yin ; Chen, Chun-Hua
刊名	JOURNAL OF SOLID STATE ELECTROCHEMISTRY
	2018
卷号	22 期号:3 页码:797
关键词	Lithiumiron phosphate Lithium vanadium phosphate Hybridization Lattice doping Electrochemical performance
ISSN号	1432-8488
DOI	10.1007/s10008-017-3777-y
英文摘要	A solid-state reaction process with poly(vinyl alcohol) as the carbon source is developed to synthesize LiFePO4-based active powders with or without modification assistance of a small amount of Li3V2(PO4)(3). The samples are analyzed by X-ray diffraction, scanning/transmission electron microscopy, and Raman spectroscopy. It is found that, in addition to the minor effect of a lattice doping in LiFePO4 by substituting a tiny fraction of Fe2+ ions with V3+ ions, the change in the form of carbon coating on the surface of LiFePO4 plays a more important role to improve the electrochemical properties. The carbon changes partially from sp(3) to sp(2) hybridization and thus causes the significant rise in electronic conductivity in the Li3V2(PO4)(3)-modified LiFePO4 samples. Compared with the carbon-coated baseline LiFePO4, the composite material 0.9LiFePO(4)center dot 0.1Li(3)V(2)(PO4)(3) shows totally different carbon morphology and much better electrochemical properties. It delivers specific capacities of 143.6 mAh g(-1) at 10 C rate and 119.2 mAh g(-1) at 20 C rate, respectively. Even at the low temperature of -20 A degrees C, it delivers a specific capacity of 118.4 mAh g(-1) at 0.2 C.
学科主题	Electrochemistry
出版者	SPRINGER
WOS记录号	WOS:000424663900015
资助机构	We would like to show gratitude to the National Science Foundation of China (grant no. 51577175) and NSAF (grant no. U1630106) for its financial support. We also thank Elementec Ltd. in Suzhou for its technical support. ; We would like to show gratitude to the National Science Foundation of China (grant no. 51577175) and NSAF (grant no. U1630106) for its financial support. We also thank Elementec Ltd. in Suzhou for its technical support.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/24450]
专题	中国科学院上海硅酸盐研究所
作者单位	1.[Hu, Qiao 2.Liao, Jia-Ying 3.Zou, Bang-Kun 4.Yu, Mu-Fan 5.Tang, Zhong-Feng 6.Univ Sci & Technol China, CAS Key Lab Mat Energy Convers, Dept Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China 7.[Hu, Qiao 8.Liao, Jia-Ying 9.Zou, Bang-Kun 10.Yu, Mu-Fan
推荐引用方式 GB/T 7714	Hu, Qiao,Liao, Jia-Ying,Zou, Bang-Kun,et al. Improving the rate and low-temperature performance of LiFePO4 by tailoring the form of carbon coating from amorphous to graphene-like[J]. JOURNAL OF SOLID STATE ELECTROCHEMISTRY,2018,22(3):797, 805.
APA	Hu, Qiao.,Liao, Jia-Ying.,Zou, Bang-Kun.,Yu, Mu-Fan.,Tang, Zhong-Feng.,...&Chen, Chun-Hua.(2018).Improving the rate and low-temperature performance of LiFePO4 by tailoring the form of carbon coating from amorphous to graphene-like.JOURNAL OF SOLID STATE ELECTROCHEMISTRY,22(3),797.
MLA	Hu, Qiao,et al."Improving the rate and low-temperature performance of LiFePO4 by tailoring the form of carbon coating from amorphous to graphene-like".JOURNAL OF SOLID STATE ELECTROCHEMISTRY 22.3(2018):797.