气候变化领域集成服务门户(CCPortal): Facile formation of tetragonal-Nb2O5 microspheres for high-rate and stable lithium storage with high areal capacity

CCPortal

DOI	10.1016/j.scib.2020.04.011
	Facile formation of tetragonal-Nb2O5 microspheres for high-rate and stable lithium storage with high areal capacity
	Hu Z.; He Q.; Liu Z.; Liu X.; Qin M.; Wen B.; Shi W.; Zhao Y.; Li Q.; Mai L.
发表日期	2020
ISSN	20959273
起始页码	1154
结束页码	1162
卷号	65 期号:14
英文摘要	Niobium pentoxide (Nb2O5) has attracted great attention as an anode for lithium-ion battery, which is attributed to the high-rate and good stability performances. In this work, TT-, T-, M-, and H-Nb2O5 microspheres were synthesized by a facile one-step thermal oxidation method. Ion and electron transport properties of Nb2O5 with different phases were investigated by both electrochemical analyses and density functional theoretical calculations. Without nanostructuring and carbon modification, the tetragonal Nb2O5 (M-Nb2O5) displays preferable rate capability (121 mAh g−1 at 5 A g−1), enhanced reversible capacity (163 mAh g−1 at 0.2 A g−1) and better cycling stability (82.3% capacity retention after 1000 cycles) when compared with TT-, T-, and H-Nb2O5. Electrochemical analyses further reveal the diffusion-controlled Li+ intercalation kinetics and in-situ X-ray diffraction analysis indicates superior structural stability upon Li+ intercalation/deintercalation. Benefiting from the intrinsic fast ion/electron transport, a high areal capacity of 2.24 mAh cm−2 is obtained even at an ultrahigh mass loading of 22.51 mg cm−2. This work can promote the development of Nb2O5 materials for high areal capacity and stable lithium storage towards practical applications. © 2020 Science China Press
关键词	Areal capacity Ion and electron transport Lithium-ion battery Mass loading Niobium pentoxide
英文关键词	Density functional theory; Electron transport properties; Ions; Lithium-ion batteries; Microspheres; Stability; Thermooxidation; X ray powder diffraction; Carbon modification; Diffusion controlled; Electrochemical analysis; In-situ X-ray diffraction; Intercalation kinetics; Reversible capacity; Structural stabilities; Theoretical calculations; Niobium oxide
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207061
作者单位	State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China; State Key Laboratory of Silicate Materials for Architectures, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China
推荐引用方式 GB/T 7714	Hu Z.,He Q.,Liu Z.,et al. Facile formation of tetragonal-Nb2O5 microspheres for high-rate and stable lithium storage with high areal capacity[J],2020,65(14).
APA	Hu Z..,He Q..,Liu Z..,Liu X..,Qin M..,...&Mai L..(2020).Facile formation of tetragonal-Nb2O5 microspheres for high-rate and stable lithium storage with high areal capacity.Science Bulletin,65(14).
MLA	Hu Z.,et al."Facile formation of tetragonal-Nb2O5 microspheres for high-rate and stable lithium storage with high areal capacity".Science Bulletin 65.14(2020).