title: Rational Design of NiCoO2@SnO2 Heterostructure Attached on Amorphous Carbon Nanotubes with Improved Lithium Storage Properties.
abstract: It still remains very challenging to design proper heterostructures to enhance the electrochemical performance of transition metal oxide-based anode materials for lithium-ion batteries. Here, we synthesized the NiCoO2 nanosheets@SnO2 layer heterostructure supported by amorphous carbon nanotubes (ACNTs) which is derived from polymeric nanotubes (PNTs) by a stepwise method. The inner SnO2 layer not only provides a considerable capacity contribution but also produces the extra Li2O to promote the charge process of NiCoO2 and thus results in a rising cycling performance. Combining with the contribution of ACNTs backbone and ultrathin NiCoO2 nanosheets, the specific capacities of these one-dimensional nanostructures show an interesting gradually increasing trend even after 100 cycles at 400 mA g(-1) with a final result of 1166 mAh g(-1). This approach can be an efficient general strategy for the preparation of mixed-metal-oxide one-dimensional nanostructures and this innovative design of hybrid electrode materials provides a promising approach for batteries with improved electrochemical performance.
authors.affiliation: Department of Applied Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Xu
authors.affiliation: Department of Applied Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China.
authors.forename: Sheng
authors.initials: S
authors.lastname: Chen
authors.affiliation: Department of Applied Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China.
authors.forename: Chunhui
authors.initials: C
authors.lastname: Xiao
authors.affiliation: Department of Materials Science and Metallurgy, University of Cambridge , Cambridge CB3 0FS, United Kingdom.
authors.forename: Kai
authors.initials: K
authors.lastname: Xi
authors.affiliation: Department of Applied Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China.
authors.forename: Chaowei
authors.initials: C
authors.lastname: Guo
authors.affiliation: Department of Applied Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China.
authors.forename: Shengwu
authors.initials: S
authors.lastname: Guo
authors.affiliation: Department of Applied Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China.
authors.forename: Shujiang
authors.initials: S
authors.lastname: Ding
authors.affiliation: Department of Applied Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China.
authors.forename: Demei
authors.initials: D
authors.lastname: Yu
authors.affiliation: Department of Materials Science and Metallurgy, University of Cambridge , Cambridge CB3 0FS, United Kingdom.
authors.forename: R Vasant
authors.initials: RV
authors.lastname: Kumar
keywords: amorphous carbon nanotubes; lithium ion batteries; synergistic effect; ternary nickel cobaltite; tin oxide