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Stable Alkali Metal Ion Intercalation Compounds as Optimized Metal Oxide Nanowire Cathodes for Lithium Batteries
Zhao, YL; Han, CH; Yang, JW; Su, J; Xu, XM; Li, S; Xu, L; Fang, RP; Jiang, H; Zou, XD; Song, B; Mai, LQ; Zhang, QJ
2015
Source PublicationNANO LETTERS
Volume15Issue:3Pages:2180—2185
Subtype期刊文献
AbstractIntercalation of ions in electrode materials has been explored to improve the rate capability in lithium batteries and supercapacitors, due to the enhanced diffusion of Li+ or electrolyte cations. Here, we describe a synergistic effect between crystal structure and intercalated ion by experimental characterization and ab initio calculations, based on more than 20 nanomaterials: five typical cathode materials together with their alkali metal ion intercalation compounds A-M-O (A = Li, Na, K, Rb; M = V, Mo, Co, Mn, Fe-P). Our focus on nanowires is motivated by general enhancements afforded by nanoscale structures that better sustain lattice distortions associated with charge/discharge cycles. We show that preintercalation of alkali metal ions in V-O and Mo-O yields substantial improvement in the Li ion charge/discharge cycling and rate, compared to A-Co-O, A-Mn-O, and A-Fe-P-O. Diffraction and modeling studies reveal that preintercalation with K and Rb ions yields a more stable interlayer expansion, which prevents destructive collapse of layers and allow Li ions to diffuse more freely. This study demonstrates that appropriate alkali metal ion intercalation in admissible structure can overcome the limitation of cyclability as well as rate capability of cathode materials, besides, the preintercalation strategy provides an effective method to enlarge diffusion channel at the technical level, and more generally, it suggests that the optimized design of stable intercalation compounds could lead to substantial improvements for applications in energy storage.
KeywordElectrochemical Energy-storage High-performance High-power Electrodes Cyclability Challenges Capacity Carbides Devices
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24577
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Zhao, YL,Han, CH,Yang, JW,et al. Stable Alkali Metal Ion Intercalation Compounds as Optimized Metal Oxide Nanowire Cathodes for Lithium Batteries[J]. NANO LETTERS,2015,15(3):2180—2185.
APA Zhao, YL.,Han, CH.,Yang, JW.,Su, J.,Xu, XM.,...&Zhang, QJ.(2015).Stable Alkali Metal Ion Intercalation Compounds as Optimized Metal Oxide Nanowire Cathodes for Lithium Batteries.NANO LETTERS,15(3),2180—2185.
MLA Zhao, YL,et al."Stable Alkali Metal Ion Intercalation Compounds as Optimized Metal Oxide Nanowire Cathodes for Lithium Batteries".NANO LETTERS 15.3(2015):2180—2185.
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