Muruganantham R.Sivakumar M.Subadevi R.Ramaprabhu S.Wu N.-L.2019-05-172019-05-17201517388090https://scholars.lib.ntu.edu.tw/handle/123456789/409006The graphene enfolded LiFePO<inf>4</inf>/C composite cathode material has been prepared via low temperature polyol process, followed by a simple chemical reaction method. The low viscous polyol solvent (DEG) (35.7 mPa s at 25¢XC) and usage of low temperature process (below 245¢XC) aid the graphene tightly encapsulated on the LiFePO<inf>4</inf> surface that plays an important role, especially in the high rate performances over long cycles, efficiently preventing the separation of the graphene and LiFePO<inf>4</inf> during the reaction processes, hence realizing the full potential of the active materials. The graphitization on LiFePO<inf>4</inf>/C remarkably increased the electronic conductivity of LiFePO<inf>4</inf>. The layered sheets of graphene wrapped on LiFePO<inf>4</inf> particles provide void between graphene sheets and LiFePO<inf>4</inf> surfaces, which facilitate the diffusion of Li+. This approach opens up a method to attain the theoretical capacity of LiFePO<inf>4</inf>. The material exhibits a superior electrochemical performance such as initial discharge capacities of 169.6 and 92 mAhg?1 at 0.1 and 30 C rates, respectively. It has an excellent capacity retention and diminutive capacity fading. The nanosize of LiFePO<inf>4</inf> particle causes a shorter diffusion path, which reduces the time for Li+ migration between cathode and electrolyte. [Figure not available: see fulltext.] ? 2015, The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht.capacity fadingelectrochemical performancegrapheneLiFePO<inf>4</inf>polyol process[SDGs]SDG7Alcohols; Cathodes; Electric batteries; Electric discharges; Electrodes; Graphene; Lithium; Lithium alloys; Lithium-ion batteries; Silicate minerals; Temperature; Capacity fading; Chemical reaction methods; Composite cathode material; Electrochemical performance; Initial discharge capacities; LiFePO; Low- temperature process; Polyol process; Lithium compoundsjournal article10.1007/s13391-015-5061-62-s2.0-84942123246https://www.scopus.com/inward/record.uri?eid=2-s2.0-84942123246&doi=10.1007%2fs13391-015-5061-6&partnerID=40&md5=73d2d2268000d9b9b759283eb326c9dd