화학공학소재연구정보센터
Journal of Electroanalytical Chemistry, Vol.788, 203-209, 2017
Electrochemical kinetics of Na2Ti3O7 as anode material for lithium-ion batteries
In this work, Na2Ti3O7 is fabricated as lithium storage material via one-step solid state reaction. Worked as anode material, Na2Ti3O7 delivers a stable electrochemical performance with good lithium storage capability. Structural analyses show that Na2Ti3O7 anode experiences slight volume change during electrochemical lithiation/delithiation process. Moreover, the reversibility of structural evolution is further demonstrated by in-situ X-ray diffraction technique. All these evidences prove the cycling stability of Na2Ti3O7 as lithium storage material. Besides, the kinetic properties of the Li+ ion storage in Na2Ti3O7 are systematically investigated. The observed results reveal that Na2Ti3O7 delivers the lithium ions diffusion coefficient in the range of 10(-14)-10(-12) cm(2) s(-1) during the discharge process and 10(-15)-10(-12) cm(2) s(-1) during the recharge process. It suggests that Na2Ti3O7 has good lithiation/delithiation kinetics in rechargeable batteries. (C) 2017 Elsevier B.V. All rights reserved.