title: Zinc-Reduced Mesoporous TiOxLi-Ion Battery Anodes with Exceptional Rate Capability and Cycling Stability.
abstract: We demonstrate a unique synthetic route for oxygen-deficient mesoporous TiOxby a redox-transmetalation process by using Zn metal as the reducing agent. The as-obtained materials have significantly enhanced electronic conductivity; 20 times higher than that of as-synthesized TiO2material. Moreover, electrochemical impedance spectroscopy (EIS) and galvanostatic intermittent titration technique (GITT) measurements are performed to validate the low charge carrier resistance of the oxygen-deficient TiOx. The resulting oxygen-deficient TiOxbattery anode exhibits a high reversible capacity (∼180 mA h g-1at a discharge/charge rate of 1 C/1 C after 400 cycles) and an excellent rate capability (∼90 mA h g-1even at a rate of 10 C). Also, the full cell, which is coupled with a LiCoO2cathode material, exhibits an outstanding rate capability (>75 mA h g-1at a rate of 3.0 C) and maintains a reversible capacity of over 100 mA h g-1at a discharge/charge of 1 C/1 C for 300 cycles.
authors.affiliation: Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
authors.forename: Woo-Jin
authors.initials: WJ
authors.lastname: Song
authors.affiliation: Department of Environmental and Chemical Industry, Ulsan College, Ulsan, 44610, Republic of Korea.
authors.forename: Seungmin
authors.initials: S
authors.lastname: Yoo
authors.affiliation: Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
authors.forename: Jung-In
authors.initials: JI
authors.lastname: Lee
authors.affiliation: Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
authors.forename: Jung-Gu
authors.initials: JG
authors.lastname: Han
authors.affiliation: Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
authors.forename: Yeonguk
authors.initials: Y
authors.lastname: Son
authors.affiliation: Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
authors.forename: Sun-I
authors.initials: SI
authors.lastname: Kim
authors.affiliation: Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
authors.forename: Myoungsoo
authors.initials: M
authors.lastname: Shin
authors.affiliation: Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
authors.forename: Sinho
authors.initials: S
authors.lastname: Choi
authors.affiliation: Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
authors.forename: Ji-Hyun
authors.initials: JH
authors.lastname: Jang
authors.affiliation: Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
authors.forename: Jaephil
authors.initials: J
authors.lastname: Cho
authors.affiliation: Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
authors.forename: Nam-Soon
authors.initials: NS
authors.lastname: Choi
authors.affiliation: Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
authors.forename: Soojin
authors.initials: S
authors.lastname: Park
keywords: lithium-ion batteries; mesoporous TiOx; redox-transmetalation process; zinc reduction