title: Highly Reversible Lithium-ions Storage of Molybdenum Dioxide Nanoplates for High Power Lithium-ion Batteries.
abstract: Herein, MoO2 nanoplates have been facilely prepared through a hydrothermal process by using MoO3 microbelts as the intercalation host. The obtained MoO2 nanoplates manifest excellent electrochemical properties when the discharge cutoff voltage is simply set at 1.0 V to preclude the occurrence of conversion reactions. Its initial reversible capacity reaches 251 mAh g(-1), which is larger than that of Li4Ti5O12 , at a current rate of 0.2 C. The average capacity decay is only 0.0465 mAh g(-1) per cycle, with a coulombic efficiency of 99.5% (from the 50th cycle onward) for 2000 cycles at 1 C. Moreover, this MoO2 electrode demonstrates an outstanding high power performance. When the current rate is increased from 0.2 to 50 C, about 54% of the capacity is retained. The superior electrochemical performance can be attributed to the metallic conductivity of MoO2, short Li(+) diffusion distance in the nanoplates, and reversible crystalline phase conversion of the addition-type reaction of MoO2. The prepared MoO2 nanoplates may hopefully replace their currently used analogues, such as Li4Ti5O12 , in high power lithium-ion batteries.
authors.affiliation: Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai (PR China).|School of Chemistry and Chemical Engineering, Nanjing University, Nanjing (PR China).
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Liu
authors.affiliation: Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai (PR China). yangj723@sjtu.edu.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: Yang
authors.affiliation: School of Chemistry and Chemical Engineering, Nanjing University, Nanjing (PR China). whou@nju.edu.cn.
authors.forename: Wenhua
authors.initials: W
authors.lastname: Hou
authors.affiliation: Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai (PR China).
authors.forename: Jiulin
authors.initials: J
authors.lastname: Wang
authors.affiliation: Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai (PR China).
authors.forename: Yanna
authors.initials: Y
authors.lastname: Nuli
mesh_terms: D011211:Electric Power Supplies; D008094:Lithium / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008982:Molybdenum / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010087:Oxides / Q000737:chemistry*
chemical_list: D010087:Oxides; C539565:molybdenum dioxide; D008982:Molybdenum; D008094:Lithium
keywords: batteries; lithium; molybdenum oxide; nanoplates; reversibility