Lee, Min Eui Lee, Seunggon Choi, Jaewon Jin, Hyoung-Joon Han, Seungyong Yun, Young Soo 2024-01-19T19:30:13Z 2024-01-19T19:30:13Z 2022-01-25 2019-09 1613-6810 https://pubs.kist.re.kr/handle/201004/119603 Anode-free sodium metal batteries (AF-SMBs) can deliver high energy and enormous power, but their cycle lives are still insufficient for them to be practical as a power source in modern electronic devices and/or grid systems. In this study, a nanohybrid template based on high aspect-ratio silver nanofibers and nitrogen-rich carbon thin layers as a core-shell structure is designed to improve the Coulombic efficiency (CE) and cycling performance of AF-SMBs. The catalytic nanohybrid templates dramatically reduce the voltage overshooting caused by metal nucleation to one-fifth that of a bare Al foil electrode (approximate to 6 mV vs approximate to 30 mV), and high average CE values of >99% are achieved over a wide range of current rates from 0.2 to 8 mA cm(-2). Moreover, exceptionally long cycle lives for more than 1600 cycles and an additional 1500 cycles are achieved with a highly stable CE of >99.9%. These results show that AF-SMBs are feasible with the nanohybrid electrode system. English WILEY-V C H VERLAG GMBH Anode-Free Sodium Metal Batteries Based on Nanohybrid Core-Shell Templates Article 10.1002/smll.201901274 1 SMALL, v.15, no.37 SMALL 15 37 N scie scopus 000476301500001 2-s2.0-85069927851 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article ION BATTERY ENERGY-CONSUMPTION HARD CARBON ELECTRODE CATHODE LAYER anode-free core-shell metal batteries nanohybrid nitrogen-doped carbon