title: Chemically Lithiated TiO2 Heterostructured Nanosheet Anode with Excellent Rate Capability and Long Cycle Life for High-Performance Lithium-Ion Batteries.
abstract: A new form of dual-phase heterostructured nanosheet comprised of oxygen-deficient TiO2/Li4Ti5O12 has been successfully synthesized and used as anode material for lithium ion batteries. With the three-dimensional (3D) Ti mesh as both the conducting substrate and the Ti(3+)/Ti(4+) source, blue anatase Ti(3+)/TiO2nanosheets were grown by a hydrothermal reaction. By controlling the chemical lithiation period of TiO2 nanosheets, a phase boundary was created between the TiO2 and the newly formed Li4Ti5O12, which contribute additional capacity benefiting from favorable charge separation between the two phase interfaces. Through further hydrogenation of the 3D TiO2/Li4Ti5O12 heterostructured nanosheets (denoted as H-TiO2/LTO HNS), an extraordinary rate performance with capacity of 174 mAh g(-1) at 200 C and outstanding long-term cycling stability with only an ∼6% decrease of its initial specific capacity after 6000 cycles were delivered. The heterostructured nanosheet morphology provides a short length of lithium diffusion and high electrode/electrolyte contact area, which could also explain the remarkable lithium storage performance. In addition, the full battery assembled based on the H-TiO2/LTO anode achieves high energy and power densities.
authors.affiliation: KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , Guangzhou 510275, People's Republic of China.
authors.forename: Muhammad-Sadeeq
authors.initials: MS
authors.lastname: Balogun
authors.affiliation: KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , Guangzhou 510275, People's Republic of China.
authors.forename: Yikun
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , Guangzhou 510275, People's Republic of China.
authors.forename: Weitao
authors.initials: W
authors.lastname: Qiu
authors.affiliation: KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , Guangzhou 510275, People's Republic of China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Luo
authors.affiliation: KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , Guangzhou 510275, People's Republic of China.
authors.forename: Yongchao
authors.initials: Y
authors.lastname: Huang
authors.affiliation: Instrumental Analysis and Research Centre, Sun Yat-Sen University , Guangzhou 510275, People's Republic of China.
authors.forename: Chaolun
authors.initials: C
authors.lastname: Liang
authors.affiliation: KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , Guangzhou 510275, People's Republic of China.
authors.forename: Xihong
authors.initials: X
authors.lastname: Lu
authors.affiliation: KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , Guangzhou 510275, People's Republic of China.
authors.forename: Yexiang
authors.initials: Y
authors.lastname: Tong
keywords: TiO2−Li4Ti5O12; heterostructured nanosheet; lithium ion battery; oxygen vacancy; phase boundary