Characterization of lithium zinc titanate doped with metal ions as anode materials for lithium ion batteries. Issue 9 (17th February 2021)

• Record Type: Journal Article
• Authors: Tang, Haoqing; Song, Yaoming; Zan, Lingxing; Yue, Yizhi; Dou, Di; Song, Yike; Wang, Miao; Liu, Xiaotong; Liu, Tao; Tang, Zhiyuan
• Is Part Of: Dalton transactions. Volume 50:Issue 9(2021)
• Page Start: 3356
• Page End: 3368
• Publication Date: 2021-02-17
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d0dt04073h
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : The metal doped Li2 Zn0.9 M0.1 Ti3 O8 products are successfully fabricated via a high temperature calcination process. The ionic and electronic conductivities of Li2 Zn0.9 Nb0.1 Ti3 O8 has improved and shows the best lithium storage. Abstract : With the aim of improving the ionic and electronic conductivities of Li2 ZnTi3 O8 for high performance lithium ion battery applications, Li2 Zn0.9 M0.1 Ti3 O8 (M = Li +, Cu 2+, Al 3+, Ti 4+, Nb 5+, Mo 6+ ) compounds are successfully fabricated using facile high temperature calcination at 800 °C. Physical characterization and lithium ion reversible storage demonstrate that Zn-site substitution by multivalent metal ions is beneficial for improving the migration rate of ions and electrons of Li2 ZnTi3 O8 . X-ray diffraction analysis and scanning electron microscopy reveal that the crystal structure and microscopic morphology of bare Li2 ZnTi3 O8 do not change by introducing a small amount of foreign metal ions. As a result, Li2 Zn0.9 Nb0.1 Ti3 O8 retains a reversible capacity as high as 198 mA h g −1 at the end of the 500th cycle among all samples. Even when cycled at high temperatures, Li2 Zn0.9 Nb0.1 Ti3 O8 still maintains excellent reversible discharge capacities of 210 mA h g −1 and 196 mA h g −1 at 1000 mA g −1 for the 100th cycle at 50 °C and 60 °C, respectively. All the conclusions indicate that Li2 Zn0.9 Nb0.1 Ti3 O8 is a high-performance anode material for large-scale energy storage devices.