title: TiC/NiO Core/Shell Nanoarchitecture with Battery-Capacitive Synchronous Lithium Storage for High-Performance Lithium-Ion Battery.
abstract: The further development of electrode materials with high capacity and excellent rate capability presents a great challenge for advanced lithium-ion batteries. Herein, we demonstrate a battery-capacitive synchronous lithium storage mechanism based on a scrupulous design of TiC/NiO core/shell nanoarchitecture, in which the TiC nanowire core exhibits a typical double-layer capacitive behavior, and the NiO nanosheet shell acts as active materials for Li(+) storage. The as-constructed TiC/NiO (32 wt % NiO) core/shell nanoarchitecture offers high overall capacity and excellent cycling ability, retaining above 507.5 mAh g(-1) throughout 60 cycles at a current density of 200 mA g(-1) (much higher than theoretical value of the TiC/NiO composite). Most importantly, the high rate capability is far superior to that of NiO or other metal oxide electrode materials, owing to its double-layer capacitive characteristics of TiC nanowire and intrinsic high electrical conductivity for facile electron transport during Li(+) storage process. Our work offers a promising approach via a rational hybridization of two electrochemical energy storage materials for harvesting high capacity and good rate performance.
authors.affiliation: College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
authors.forename: Hui
authors.initials: H
authors.lastname: Huang
authors.affiliation: College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
authors.forename: Tong
authors.initials: T
authors.lastname: Feng
authors.affiliation: College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
authors.forename: Yongping
authors.initials: Y
authors.lastname: Gan
authors.affiliation: College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
authors.forename: Mingyu
authors.initials: M
authors.lastname: Fang
authors.affiliation: College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Xia
authors.affiliation: College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
authors.forename: Chu
authors.initials: C
authors.lastname: Liang
authors.affiliation: College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
authors.forename: Xinyong
authors.initials: X
authors.lastname: Tao
authors.affiliation: College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
authors.forename: Wenkui
authors.initials: W
authors.lastname: Zhang
keywords: core/shell nanoarchitecture; lithium storage mechanism; lithium-ion batteries; metal oxides; titanium carbide