Cr3+-Doped TiNb2O7 as an advanced anode material for high-performance lithium-ion batteries

doi:10.1016/j.apsusc.2022.156155

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Title:	Cr3+-Doped TiNb2O7 as an advanced anode material for high-performance lithium-ion batteries
Authors:	Yu-Sheng Hsiao, Lo-Yueh Chang, Chih-Wei Hu, Cheng-Zhang Lu, Nian-Jheng Wu, Ying-Lin Chen, Tzu-Hsien Hsieh, Jen-Hsien Huang, Shih-Chieh Hsu*, Huei-Chu Weng, Chih-Ping Chen
Date:	2023-03-30
Issue Date:	2024-07-09 12:05:39 (UTC+8)
Publisher:	Elsevier
Abstract:	Because of its high operating potential (ca. 1.6 V), high theoretical capacity (ca. 387 mA h/g), and safety of operation, TiNb2O7 (TNO) is a promising anode material and an excellent alternative to spinel Li4Ti5O12. To overcome the poor electrical conductivity and low Li+ ion diffusion coefficient of pure TNO, and, thereby, significantly improve its rate performance, in this study we prepared a novel Ti1–xCrxNb2O7 (x = 0.05; Cr-TNO) anode material. When evaluated for its energy storage performance, the electrochemical properties of Cr-TNO were improved relative to those of TNO, including an excellent rate capability (178.2 mA h/g at 10C) and good cycle stability (84.2 % retention after 500 cycles), due to enhanced electronic and ionic conductivities. Furthermore, we demonstrate herein the practical applications of Cr-TNO when combined with active carbon and a LiNi0.5Mn1.5O4 cathode in an asymmetric supercapacitor and a full lithium-ion battery, respectively. Both of these devices possessed pronounced cycling stability and rapid charge/discharge characteristics, reflecting the excellent electrochemical performance of Cr-TNO.
Relation:	Applied Surface Science 614, 156155
DOI:	10.1016/j.apsusc.2022.156155
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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