Article Title

Controlled Ag-driven superior rate-capability of Li₄Ti₅O₁₂ anodes for lithium rechargeable batteries

Authors

Jae-Geun Kim, Institute for Superconducting and Electronic Materials, University of Wollongong, North Wollongong, NSW 2500, Australia
Dongqi Shi, Institute for Superconducting and Electronic Materials, University of Wollongong, North Wollongong, NSW 2500, Australia
Min-Sik Park, Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam 463-816, Republic of Korea
Goojin Jeong, Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam 463-816, Republic of Korea
Yoon-Uk Heo, Research Facility Center, Graduate Institute of Ferrous Technology, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
Minsu Seo, Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam 463-816, Republic of Korea
Young-Jun Kim, Advanced Batteries Research Center, Korea Electronics Technology Institute, Seongnam 463-816, Republic of Korea
Jung Ho Kim, Institute for Superconducting and Electronic Materials, University of Wollongong, North Wollongong, NSW 2500, Australia
Shi Xue Dou, Institute for Superconducting and Electronic Materials, University of Wollongong, North Wollongong, NSW 2500, Australia

Keywords

spinel Li4Ti5O12 (LTO), electrospinning, silver doping, lithium rechargeable batteries, 1D nanostructure

Abstract

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.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-013-0313-y

Publisher

Tsinghua University Press

Recommended Citation

Jae-Geun Kim,Dongqi Shi,Min-Sik Park,Goojin Jeong,Yoon-Uk Heo,Minsu Seo,Young-Jun Kim,Jung Ho Kim,Shi Xue Dou, Controlled Ag-driven superior rate-capability of Li4Ti5O12 anodes for lithium rechargeable batteries. NanoRes.2013, 6(5): 365–372