title: Multishelled TiO2 hollow microspheres as anodes with superior reversible capacity for lithium ion batteries.
abstract: Herein, uniform multishelled TiO2 hollow microspheres were synthesized, especially 3- and 4-shelled TiO2 hollow microspheres were synthesized for the first time by a simple sacrificial method capable of controlling the shell thickness, intershell spacing, and number of internal multishells, which are achieved by controlling the size, charge, and diffusion rate of the titanium coordination ions as well as the calcination process. Used as anodes for lithium ion batteries, the multishelled TiO2 hollow microspheres show excellent rate capacity, good cycling performance, and high specific capacity. A superior capacity, up to 237 mAh/g with minimal irreversible capacity after 100 cycles is achieved at a current rate of 1 C (167.5 mA/g), and a capacity of 119 mAh/g is achieved at a current rate of 10 C even after 1200 cycles.
authors.affiliation: Department of Physical Chemistry, School of Metallurgical and Ecological Engineering, University of Science & Technology Beijing , No. 30, Xueyuan Road, Haidian District, Beijing 100083, P. R. China.
authors.forename: Hao
authors.initials: H
authors.lastname: Ren
authors.forename: Ranbo
authors.initials: R
authors.lastname: Yu
authors.forename: Jiangyan
authors.initials: J
authors.lastname: Wang
authors.forename: Quan
authors.initials: Q
authors.lastname: Jin
authors.forename: Mei
authors.initials: M
authors.lastname: Yang
authors.forename: Dan
authors.initials: D
authors.lastname: Mao
authors.forename: David
authors.initials: D
authors.lastname: Kisailus
authors.forename: Huijun
authors.initials: H
authors.lastname: Zhao
authors.forename: Dan
authors.initials: D
authors.lastname: Wang
keywords: TiO2; anode; electrode; hollow microsphere; lithium ion battery; multishelled