Mun, Junyoung Ha, Hyung-Wook Choi, Wonchang 2024-01-20T10:02:04Z 2024-01-20T10:02:04Z 2021-09-05 2014-04-01 0378-7753 https://pubs.kist.re.kr/handle/201004/126893 In this paper, we report a simple sol-gel method for the synthesis of a composite containing reduced graphene oxide (R-GO) embedded within nano LiFePO4 particles for a lithium-ion battery cathode. This composite has an effective electron pathway and a highly meso-porous structure as compared to conventional LiFePO4. Highly conductive R-GO, together with the meso-porosity results in a material that has good electronic conductivity and high electrolyte permeability. Electrodes fabricated from the composite exhibited excellent performance when evaluated as lithium-ion battery cathodes, including compared to pristine LiFePO4. The electrode of the R-GO composite exhibits excellent rate capabilities of 125 mAh g(-1) at 10 C, whereas pristine LiFePO4 could deliver only 81.5 mAh g(-1) at the same condition. It also achieves an improved cyclability with capacity retention ratios of 92.48% after 200 cycles at 10 C, as well. (C) 2013 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV COMPOSITE CATHODE MATERIAL ION BATTERIES ELECTROCHEMICAL CHARACTERIZATION SECONDARY BATTERIES HIGH-POWER PERFORMANCE ROUTE NANOCOMPOSITE SPECTROSCOPY REDUCTION Nano LiFePO4 in reduced graphene oxide framework for efficient high-rate lithium storage Article 10.1016/j.jpowsour.2013.11.034 1 JOURNAL OF POWER SOURCES, v.251, pp.386 - 392 JOURNAL OF POWER SOURCES 251 386 392 scie scopus 000330256400049 2-s2.0-84890939744 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article COMPOSITE CATHODE MATERIAL ION BATTERIES ELECTROCHEMICAL CHARACTERIZATION SECONDARY BATTERIES HIGH-POWER PERFORMANCE ROUTE NANOCOMPOSITE SPECTROSCOPY REDUCTION Reduced graphene oxide Lithium-ion batteries Cathode material Lithium iron phosphate Sol gel method