Kim, Doo-Won Kim, So Yeun Yang, Kap Seung 2024-01-19T13:01:26Z 2024-01-19T13:01:26Z 2022-04-05 2022-01 0957-4484 https://pubs.kist.re.kr/handle/201004/115835 Niobium pentoxide (Nb2O5)-based materials have attracted significant interest for application in diverse fields. Unfortunately, the employment of these materials as electrodes of lithium-ion batteries (LIBs) is limited by several inherent drawbacks. The present study demonstrated the synthesis of composites comprising homogeneous graphene-wrapped niobium pentoxide (GNbO) encapsulated in carbon nanofibers (CNFs) for utilization as binder- and additive-free anodes in LIBs. The composites were synthesized via electrospinning and subsequent carbonization; the presence of graphene (G) ensured the homogenous dispersion of the Nb2O5 particles in the CNF matrix. The CNFs formed a highly conductive network that resulted in high physical flexibility, electrical conductivity, and structural stability during charge-discharge cycles, thereby facilitating rapid ion/electron transmission. Consequently, the CNF/GNbO composite anodes exhibited outstanding electrochemical performances. CNF/GNbO_5 (one of the synthesized composites with an Nb2O5 concentration of 5 wt% relative to GO) delivered a specific capacity of 361 mAh g(-1) after 100 cycles, corresponding to a capacity retention of 58.3%. In addition, it exhibited an excellent rate capability with a capacity of 317 mAh g(-1) at 10 C. The outcomes of the present study will facilitate the extensive application of the synthesized composites as high-performance anodes in next-generation LIBs. English IOP Publishing Ltd Synthesis of freestanding binder- and additive-free carbon nanofiber with graphene-wrapped Nb2O5 composite anode for lithium-ion batteries Article 10.1088/1361-6528/ac162d 1 NANOTECHNOLOGY, v.33, no.1 NANOTECHNOLOGY 33 1 N scie scopus 000709106600001 2-s2.0-85118195957 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Science & Technology - Other Topics Materials Science Physics Article THIN-FILM NIOBIUM RAMAN PERFORMANCE niobium pentoxide graphene warping electrospinning carbon nanofiber anode lithium-ion battery