title: Hierarchical TiO2 spheres as highly efficient polysulfide host for lithium-sulfur batteries.
abstract: Hierarchical TiO2 micron spheres assembled by nano-plates were prepared through a facile hydrothermal route. Chemical tuning of the TiO2 through hydrogen reduction (H-TiO2) is shown to increase oxygen-vacancy density and thereby modifies the electronic properties. H-TiO2 spheres with a polar surface serve as the surface-bound intermediates for strong polysulfides binding. Under the restricting and recapturing effect, the sulfur cathode could deliver a high reversible capacity of 928.1 mA h g(-1) after 50 charge-discharge cycles at a current density of 200 mA g(-1). The H-TiO2 additive developed here is practical for restricting and recapturing the polysulfide from the electrolyte.
authors.affiliation: Key Laboratory of Automobile Materials of Ministry of Education &School of Materials Science and Engineering, Jilin University, Changchun 130025, China.
authors.forename: Zhi-Zheng
authors.initials: ZZ
authors.lastname: Yang
authors.affiliation: Key Laboratory of Automobile Materials of Ministry of Education &School of Materials Science and Engineering, Jilin University, Changchun 130025, China.
authors.forename: Hui-Yuan
authors.initials: HY
authors.lastname: Wang
authors.affiliation: Key Laboratory of Automobile Materials of Ministry of Education &School of Materials Science and Engineering, Jilin University, Changchun 130025, China.
authors.forename: Lun
authors.initials: L
authors.lastname: Lu
authors.affiliation: Key Laboratory of Automobile Materials of Ministry of Education &School of Materials Science and Engineering, Jilin University, Changchun 130025, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
authors.affiliation: Key Laboratory of Automobile Materials of Ministry of Education &School of Materials Science and Engineering, Jilin University, Changchun 130025, China.
authors.forename: Xiao-Bin
authors.initials: XB
authors.lastname: Zhong
authors.affiliation: Key Laboratory of Automobile Materials of Ministry of Education &School of Materials Science and Engineering, Jilin University, Changchun 130025, China.
authors.forename: Jin-Guo
authors.initials: JG
authors.lastname: Wang
authors.affiliation: Key Laboratory of Automobile Materials of Ministry of Education &School of Materials Science and Engineering, Jilin University, Changchun 130025, China.
authors.forename: Qi-Chuan
authors.initials: QC
authors.lastname: Jiang