%0 Journal Article
%T A Modification of LiMn<sub>2</sub>O<sub>4</sub> by Ionic Conductive Agent and Electronic Conductive Agent Coating
%A Xiaohui Sun
%A Meng Wang
%A Tianming Yuan
%A Jingkang Li
%J Natural Science
%P 1-6
%@ 2150-4105
%D 2024
%I Scientific Research Publishing
%R 10.4236/ns.2024.161001
%X Carbon was used as electronic conductive agent, and metasilicic acid lithium (Li<sub>2</sub>SiO<sub>3</sub><span style=\"text-wrap:wrap;\"></span>) as ionic conductive agent, the two factors were investigated cooperatively. We evaluated their effect by using spherical spinel LiMn&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt; which prepared ourselves as cathode material. Then Li&lt;sub&gt;2&lt;/sub&gt;<span style=\"text-wrap:wrap;\"></span>SiO&lt;sub&gt;<span style=\"text-wrap:wrap;\"><sub></sub></span>3&lt;/sub&gt;<span style=\"text-wrap:wrap;\"></span>/carbon surface coating on LiMn&lt;sub&gt;<span style=\"text-wrap:wrap;\"><sub></sub></span>2&lt;/sub&gt;<span style=\"text-wrap:wrap;\"></span>O&lt;sub&gt;4&lt;/sub&gt;<span style=\"text-wrap:wrap;\"></span> (LMO/C/LSO) which Li&lt;sub&gt;<span style=\"text-wrap:wrap;\"><sub></sub></span>2&lt;/sub&gt;<span style=\"text-wrap:wrap;\"></span>SiO&lt;sub&gt;<span style=\"text-wrap:wrap;\"><sub></sub></span>3&lt;/sub&gt;<span style=\"text-wrap:wrap;\"></span> inside and carbon/Li&lt;sub&gt;<span style=\"text-wrap:wrap;\"><sub></sub></span>2&lt;/sub&gt;<span style=\"text-wrap:wrap;\"></span>SiO&lt;sub&gt;<span style=\"text-wrap:wrap;\"><sub></sub></span>3&lt;/sub&gt;<span style=\"text-wrap:wrap;\"></span> coated LiMn&lt;sub&gt;<span style=\"text-wrap:wrap;\"><sub></sub></span>2&lt;/sub&gt;<span style=\"text-wrap:wrap;\"></span>O&lt;sub&gt;<span style=\"text-wrap:wrap;\"><sub></sub></span>4&lt;/sub&gt;<span style=\"text-wrap:wrap;\"></span> (LMO/LSO/C) were prepared, All of materials were characterized by X-ray diffraction (XRD) and electrochemical test; spherical LiMn<span style=\"text-wrap:wrap;\"><sub></sub></span>2<span style=\"text-wrap:wrap;\"></span>O<span style=\"text-wrap:wrap;\"><sub></sub></span>4<span style=\"text-wrap:wrap;\"></span> was characterized by scanning electron microscopy (SEM); and coated materials were characterized by transmission electron microscopy (TEM). While uncoated spinel LiMn&lt;sub&gt;<span style=\"text-wrap:wrap;\"><sub></sub></span>2&lt;/sub&gt;<span style=\"text-wrap:wrap;\"></span>O&lt;sub&gt;<span style=\"text-wrap:wrap;\"><sub></sub></span>4&lt;/sub&gt;<span style=\"text-wrap:wrap;\"></span> maintained 72% of capacity in 60 cycles by the rate of 0.2C, and LMO/LSO/C showed the best electrochemical performance, 89% of the initial capacity remained after 75 cycles at 0.2C. Furthermore, the rate performance of LMO/LSO/C also improved obviously, about 30 mAhˇ¤g<sup>-1</sup> of capacity attained at the rate of 5C, higher than LMO/C/LSO and bare LiMn&lt;sub&gt;<span
%K Electronic Conduction
%K Ionic Conduction
%K LMO/LSO/C
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=130655