CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
A lithiation/delithiation mechanism of monodispersed MSn5 (M = Fe, Co and FeCo) nanospheres
Xin, FX; Wang, XL; Bai, JM; Wen, W; Tian, HJ; Wang, CS; Han, WQ
2015
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
Volume3Issue:13Pages:7170—7178
Subtype期刊文献
AbstractA designed Sn based alloy host as a higher capacity and longer cycle life next generation lithium-ion battery, consisting of monodisperse nanospheres of intermetallic MSn5 (M = Fe, Co and FeCo) phases was synthesized by a nanocrystal conversion chemistry method using preformed Sn nanospheres as templates. The same crystal structure, identical particle surface morphology and the similar particle size distribution (30-50 nm) of these intermetallic MSn5 (M = Fe, Co and FeCo) phases are ideal for comparison of the electrochemical performance, reaction mechanism, thermodynamics and kinetics during lithiation/delithiation. Importantly, MSn5 (M = Fe, Co and FeCo) phases with defect structures Fe0.74Sn5, Co0.83Sn5 and Fe0.35Co0.35Sn5, exhibit the highest theoretical capacity of >917 mA h g(-1) among the reported M-Sn (M is electro-chemically inactive) based intermetallic anodes. The ex situ XRD and XAFS illustrate the complete reversibility of MSn5 (M = Fe, Co and FeCo) phases during lithium insertion/extraction for the first cycle. The Fe0.35Co0.35Sn5 anode can take advantage of both high capacity of Fe0.74Sn5 and long cycle life of Co0.83Sn5, providing 736 mA h g(-1) and maintaining 92.7% of initial capacity after 100 cycles with an average capacity loss of only 0.07% per cycle. The excellent electrochemical performance of the Fe0.5Co0.5Sn5 system is attributed to higher reversibility, lower reaction resistance. This work provides a novel insight toward designing and exploring an optimal Sn based alloy anode for next generation Li-ion batteries.
KeywordLithium-ion Batteries Anode Material High-capacity Electrochemical Properties Secondary Batteries Sn Nanocrystals Li Performance Storage Alloy
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24371
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Xin, FX,Wang, XL,Bai, JM,et al. A lithiation/delithiation mechanism of monodispersed MSn5 (M = Fe, Co and FeCo) nanospheres[J]. JOURNAL OF MATERIALS CHEMISTRY A,2015,3(13):7170—7178.
APA Xin, FX.,Wang, XL.,Bai, JM.,Wen, W.,Tian, HJ.,...&Han, WQ.(2015).A lithiation/delithiation mechanism of monodispersed MSn5 (M = Fe, Co and FeCo) nanospheres.JOURNAL OF MATERIALS CHEMISTRY A,3(13),7170—7178.
MLA Xin, FX,et al."A lithiation/delithiation mechanism of monodispersed MSn5 (M = Fe, Co and FeCo) nanospheres".JOURNAL OF MATERIALS CHEMISTRY A 3.13(2015):7170—7178.
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