title: Hydrothermal Synthesis of Unique Hollow Hexagonal Prismatic Pencils of Co3 V2 O8 ⋅n H2 O: A New Anode Material for Lithium-Ion Batteries.
abstract: Hollow structures of transition-metal oxides, particularly mixed-metal oxides, could be promising for various applications such as lithium-ion batteries (LIBs). Compared to the synthesis of metal oxide hollow spheres by the template method, non-spherical metal oxide hollow hexagonal polyhedra have not been developed to date. Herein, we report the controlled hydrothermal synthesis of a new phase of Co3 V2 O8 ⋅n H2 O hollow hexagonal prismatic pencils (HHPPs), which is composed of uniform structural units. By varying the amount of NaOH in the presence of NH4 (+) and without any template or organic surfactant, the hexagonal prismatic pencils gradually transform from solid into hollow structures, with sizes varying from 5 to 20 μm. The structure of pencils can be preserved only in a limited range of the molar ratio of OH(-) /NH4 (+) . As a new anode material for LIBs, such hollow pencils exhibit impressive lithium storage properties with high capacity, good cycling stability, and superior rate capability.
authors.affiliation: Key Laboratory for Colloid and Interface, Ministry of Education and School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100 (P.R. China).
authors.forename: Fangfang
authors.initials: F
authors.lastname: Wu
authors.affiliation: Key Laboratory for Colloid and Interface, Ministry of Education and School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100 (P.R. China). chexsl@sdu.edu.cn.
authors.forename: Shenglin
authors.initials: S
authors.lastname: Xiong
authors.affiliation: Key Laboratory for Colloid and Interface, Ministry of Education and School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100 (P.R. China).|Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026 (P.R. China) http://staff.ustc.edu.cn/≈yulab/
authors.forename: Yitai
authors.initials: Y
authors.lastname: Qian
authors.affiliation: Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026 (P.R. China) http://staff.ustc.edu.cn/≈yulab/. shyu@ustc.edu.cn.
authors.forename: Shu-Hong
authors.initials: SH
authors.lastname: Yu
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D011211:Electric Power Supplies; D004566:Electrodes; D008094:Lithium; D008855:Microscopy, Electron, Scanning; D010087:Oxides / Q000737:chemistry*; D033362:Powder Diffraction; D017968:Vanadium Compounds / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D010087:Oxides; D017968:Vanadium Compounds; C581824:vanadium dioxide; D014867:Water; D003035:Cobalt; D008094:Lithium
keywords: catalysis; electrochemistry; lithium-ion batteries; mixed-metal oxides; nanostructures