%0 Journal Article
%T Cation mixing (Li0.5Fe0.5)2SO4F cathode material for lithium-ion batteries<br>
%A Sun Yang
%A Liu Lei
%A Dong Jin-Ping
%A Zhang Bin
%A Huang Xue-Jie
%A <br>
%J 中国物理 B
%D 2011
%I 
%X We study the crystal structure of a triplite-structured (Li0.5Fe0.5)SO4F with full Li+/Fe2+ mixing. This promising polyanion cathode material for lithium-ion batteries operates at 3.9 V versus Li+/Li with a theoretical capacity of 151 mAh/g. Its unique cation mixing structure does not block the Li+ diffusion and results in a small lattice volume change during the charge/discharge process. The calculations show that it has a three-dimensional network for Li-ion migration with an activation energy ranging from 0.53 eV to 0.68 eV, which is comparable with that in LiFePO4 with only one-dimensional channels. This work suggests that further exploring cathode materials with full cation mixing for Li-ion batteries will be valuable.
%K lithium-ion battery
%K cathode material
%K triplite
%K cation mixing<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=B8035D61C1BAF40F24DEFF93621C17BE&yid=9377ED8094509821&vid=A04140E723CB732E&iid=59906B3B2830C2C5&sid=AE7EB757F1E09593&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=38