| المؤلفون: |
Wang N; Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China., Xu Y; Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China., Horsley JR; School of Chemistry, Physics and Earth Sciences, The University of Adelaide, Adelaide SA 5005, Australia., Osman SM; Chemistry Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia., Yu J; School of Chemistry, Physics and Earth Sciences, The University of Adelaide, Adelaide SA 5005, Australia.; Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China., Han M; Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia., Yamauchi Y; Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia.; Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan.; Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea., Wang S; Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China. |
| مستخلص: |
Li 5 V 3 O 8 , a lithiation product derived from the LiV 3 O 8 cathode, has emerged as a promising intercalation-type anode material, boasting a theoretical capacity of 256 mA h g -1 . Through a comprehensive combination of experimental and theoretical approaches, we demonstrate its capability to intercalate a substantial amount of Li + at extremely high rates. Experimental findings reveal that Li 5 V 3 O 8 exhibits outstanding high-rate capability (with a specific capacity of 152 mA h g -1 , 60% of the theoretical capacity at 40 C) and exceptional cyclability (with a capacity retention of 80% after 11,000 cycles at 20 C). The structural changes in Li 5 V 3 O 8 during the lithiation/delithiation cycles are subtle and reversible. First-principles calculations highlight a knock-off mechanism in Li + diffusion within Li 5 V 3 O 8 , with an estimated energy barrier ranging from 0.16 to 0.38 eV, considerably lower than that of a direct hopping mechanism (0.62-1.44 eV). These ultrafast ion diffusion properties are attributed to interlock interactions among interstitial tetrahedral Li + and neighboring octahedral lattice Li + , facilitating long-distance and chain-like Li + diffusion. This study not only introduces an influential vanadium-based anode material with practical implications for fast-charging lithium-ion batteries but also provides fundamental insights into solid state Li + diffusion kinetics. |
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