title: Growth of Lithium Lanthanum Titanate Nanosheets and Their Application in Lithium-Ion Batteries.
abstract: In this work, lithium-doped lanthanum titanate (LLTO) nanosheets have been prepared by a facile hydrothermal approach. It is found that with the incorporation of lithium ions, the morphology of the product transfers from rectangular nanosheets to irregular nanosheets along with a transition from La2Ti2O7 to Li0.5La0.5TiO3. The as-prepared LLTO nanosheets are used to enhance electrochemical performance of the LiCo1/3Ni1/3Mn1/3O2 (CNM) electrode by forming a higher lithium-ion conductive network. The LiCo1/3Ni1/3Mn1/3O2-Li0.5La0.5TiO3 (CNM-LLTO) electrode shows better a lithium diffusion coefficient of 1.5 × 10(-15) cm(2) s(-1), resulting from higher lithium-ion conductivity of LLTO and shorter lithium diffusion path, compared with the lithium diffusion coefficient of CNM electrode (5.44 × 10(-16) cm(2) s(-1)). Superior reversibility and stability are also found in the CNM-LLTO electrode, which retains a capacity at 198 mAh/g after 100 cycles at a rate of 0.1 C. Therefore, it can be confirmed that the existence of LLTO nanosheets can act as bridges to facilitate the lithium-ion diffusion between the active materials and electrolytes.
authors.affiliation: School of Materials Science and Engineering, University of New South Wales , Sydney, 2052, New South Wales Australia.
authors.forename: Xi
authors.initials: X
authors.lastname: Lin
authors.affiliation: Institute for Superconducting and Electronic Materials, University of Wollongong , Wollongong, New South Wales 2522, Australia.
authors.forename: Hongqiang
authors.initials: H
authors.lastname: Wang
authors.affiliation: School of Materials Science and Engineering, University of New South Wales , Sydney, 2052, New South Wales Australia.
authors.forename: Haiwei
authors.initials: H
authors.lastname: Du
authors.affiliation: School of Materials Science and Engineering, University of New South Wales , Sydney, 2052, New South Wales Australia.
authors.forename: Xinrun
authors.initials: X
authors.lastname: Xiong
authors.affiliation: School of Materials Science and Engineering, University of New South Wales , Sydney, 2052, New South Wales Australia.
authors.forename: Bo
authors.initials: B
authors.lastname: Qu
authors.affiliation: Institute for Superconducting and Electronic Materials, University of Wollongong , Wollongong, New South Wales 2522, Australia.
authors.forename: Zaiping
authors.initials: Z
authors.lastname: Guo
authors.affiliation: School of Materials Science and Engineering, University of New South Wales , Sydney, 2052, New South Wales Australia.
authors.forename: Dewei
authors.initials: D
authors.lastname: Chu
keywords: composite electrode; hydrothermal; ionic conductivity; lithium lanthanum titanate; lithium-ion battery; nanosheets; perovskite oxides