title: Top-down fabrication of α-Fe2O3 single-crystal nanodiscs and microparticles with tunable porosity for largely improved lithium storage properties.
abstract: In this work, we report a facile top-down approach to fabricate uniform single-crystal α-Fe(2)O(3) nanodiscs via selective oxalic acid etching. Phosphate ions are employed as a capping agent to control the etching to along the [001] direction. We also show that α-Fe(2)O(3) melon-like microparticles with contrasting textural properties can be generated using the same approach. The etched particles exhibit a much larger total pore volume and average pore size compared to the pristine ones, thus serving as the possible origin for their greatly enhanced capacity retention when tested as potential anode materials for lithium-ion batteries.
authors.affiliation: School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457, China.
authors.forename: Jun Song
authors.initials: JS
authors.lastname: Chen
authors.forename: Ting
authors.initials: T
authors.lastname: Zhu
authors.forename: Xiao Hua
authors.initials: XH
authors.lastname: Yang
authors.forename: Hua Gui
authors.initials: HG
authors.lastname: Yang
authors.forename: Xiong Wen
authors.initials: XW
authors.lastname: Lou
mesh_terms: D005290:Ferric Compounds / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry*; D053768:Metal Nanoparticles; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission
chemical_list: D005290:Ferric Compounds; C000499:ferric oxide; D008094:Lithium