title: A promising Na3V2(PO4)3 cathode for use in the construction of high energy batteries.
abstract: High-energy batteries need significant cathodes which can simultaneously provide large specific capacities and high discharge plateaus. NASICON-structured Na3V2(PO4)3 (NVP) has been utilised as a promising cathode to meet this requirement and be used in the construction of high energy batteries. For a hybrid-ion battery by employing metallic lithium as an anode, NVP exhibits an initial specific capacity of 170 mA h g(-1) in the voltage range of 1.6-4.8 V with a long discharge plateau around 3.7 V. Three Na(2) sites for NVP are found capable to be utilised through the application of a wide voltage window but only two of them are able to undergo ions exchange to produce a NaLi2V2(PO4)3 phase. However, a hybrid-ion migration mechanism is suggested to exist to describe the whole ion transport in which the effects of a Na-ion "barrier" results in a lowered ion diffusion rate and observed specific capacity.
authors.affiliation: Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China. xji@csu.edu.cn.
authors.forename: Weixin
authors.initials: W
authors.lastname: Song
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Ji
authors.forename: Yinpeng
authors.initials: Y
authors.lastname: Yao
authors.forename: Hanjun
authors.initials: H
authors.lastname: Zhu
authors.forename: Qiyuan
authors.initials: Q
authors.lastname: Chen
authors.forename: Qinqin
authors.initials: Q
authors.lastname: Sun
authors.forename: Craig E
authors.initials: CE
authors.lastname: Banks