Research Article


2013, 6(5): 365–372


Controlled Ag-driven superior rate-capability of Li4Ti5O12 anode for lithium rechargeable battery

Jae-Geun Kim1, Dongqi Shi1, Min-Sik Park2, Goojin Jeong2 (), Yoon-Uk Heo3, Minsu Seo2, Young-Jun Kim2, Jung Ho Kim1 (), and Shi Xue Dou1

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1 Institute for Superconducting and Electronic Materials, University of Wollongong, North Wollongong, NSW 2500, Australia
2 Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam 463-816, Republic of Korea
3 Research Facility Center, Graduate Institute of Ferrous Technology, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea

Keywords: KEYWORDS spinel Li4Ti5O12 (LTO), electrospinning, silver doping, lithium rechargeable batteries, 1D nanostructure
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ABSTRACT The morphology and electronic structure of a Li4Ti5O12 anode are known to determine its electrical and electrochemical properties in lithium rechargeable batteries. Ag–Li4Ti5O12 nanofibers have been rationally designed and synthesized by an electrospinning technique to meet the requirements of one-dimensional (1D) morphology and superior electrical conductivity. Herein, we have found that the 1D Ag–Li4Ti5O12 nanofibers show enhanced specific capacity, rate capability, and cycling stability compared to bare Li4Ti5O12 nanofibers, due to the Ag nanoparticles (<5 nm), which are mainly distributed at interfaces between Li4Ti5O12 primary particles. This structural morphology gives rise to 20% higher rate capability than bare Li4Ti5O12 nanofibers by facilitating the charge transfer kinetics. Our findings provide an effective way to improve the electrochemical performance of Li4Ti5O12 anodes for lithium rechargeable batteries.
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Controlled Ag-driven superior rate-capability of Li4Ti5O12 anode for lithium rechargeable battery. Nano Res. 2013, 6(5): 365–372

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