Kim, Eunji Kim, Hyeri Park, Byung-Jun Han, Young-Hee Park, Jong Hyuk Cho, Jinhan Lee, Sang-Soo Son, Jeong Gon 2024-01-19T23:01:32Z 2024-01-19T23:01:32Z 2021-09-03 2018-04-19 1613-6810 https://pubs.kist.re.kr/handle/201004/121466 From graphene oxide wrapped iron oxide particles with etching/reduction process, high-performance anode and cathode materials of lithium-ion hybrid supercapacitors are obtained in the same process with different etching conditions, which consist of partially etched crumpled graphene (CG) wrapped spiky iron oxide particles (CG@SF) for a battery-type anode, and fully etched CG for a capacitive-type cathode. The CG is formed along the shape of spikily etched particles, resulting in high specific surface area and electrical conductivity, thus the CG-based cathode exhibits remarkable capacitive performance of 210 F g(-1) and excellent rate capabilities. The CG@SF can also be ideal anode materials owing to spiky and porous morphology of the particles and tightly attached crumpled graphene onto the spiky particles, which provides structural stability and low contact resistance during repetitive lithiation/delithiation processes. The CG@SF anode shows a particularly high capacitive performance of 1420 mAh g(-1) after 270 cycles, continuously increases capacity beyond the 270th cycle, and also maintains a high capacity of 170 mAh g(-1) at extremely high speeds of 100 C. The full-cell exhibits a higher energy density up to 121 Wh kg(-1) and maintains high energy density of 60.1 Wh kg(-1) at 18.0 kW kg(-1). This system could thus be a practical energy storage system to fill the gap between batteries and supercapacitors. English WILEY-V C H VERLAG GMBH 3-DIMENSIONAL GRAPHENE TEMPLATED FORMATION ENERGY-STORAGE LITHIUM BATTERY ANODE Etching-Assisted Crumpled Graphene Wrapped Spiky Iron Oxide Particles for High-Performance Li-Ion Hybrid Supercapacitor Article 10.1002/smll.201704209 1 SMALL, v.14, no.16 SMALL 14 16 scie scopus 000430398600018 2-s2.0-85043696700 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article 3-DIMENSIONAL GRAPHENE TEMPLATED FORMATION ENERGY-STORAGE LITHIUM BATTERY ANODE crumpled graphene Li-ion hybrid supercapacitors partially etched iron oxide spiky iron oxide particles supercapacitors