Choi, SW Kim, JR Jo, SM Lee, WS Kim, YR 2024-01-21T05:10:09Z 2024-01-21T05:10:09Z 2021-09-05 2005-04 0013-4651 https://pubs.kist.re.kr/handle/201004/136583 Microporous fibrous polymer electrolytes were prepared by immersing electrospun poly(acrylonitrile) (PAN)-based fibrous membranes into lithium salt-based electrolytes. They showed high ionic conductivities of up to 1.0 x 10(-3) S/cm at 20 degrees C, and sufficient electrochemical stabilities of up to 4.5 V. Their ion conduction depended on the physicochemical properties of the lithium salt-based electrolytes trapped in pores, as well as on the interactions among the Li+ ion, the carbonate, and the PAN. From the Fourier transform-Raman data, lithium ion transport was mainly achieved by the lithium salt-based electrolytes in pores via the interaction between the Li+ ion and the C=O group of carbonate molecules, and was also affected by the PAN through the interaction between the Li+ ion and the C N groups of PAN. Their electrochemical stabilities were enhanced by the swelling of the electrospun PAN nanofibers because of the dipolar interaction between the C; N groups of PAN and the C=O groups of carbonate in the lithium salt-based electrolytes. Prototype cells using electrospun PAN-based fibrous polymer electrolytes thus showed different cyclic performances, according to the composition of the lithium salt-based electrolytes. The prototype cell with 1 M LiPF6-ethylene carbonate/ dimethyl carbonate (1/1) showed the highest discharge capacity and the most stable cyclic performance among them. (c) 2005 The Electrochemical Society. English ELECTROCHEMICAL SOC INC POLYACRYLONITRILE-BASED ELECTROLYTES BINARY SOLVENT SYSTEMS LITHIUM-ION BATTERIES ETHYLENE CARBONATE GEL ELECTROLYTES TRANSPORT-PROPERTIES PHASE-DIAGRAMS CONDUCTIVITY RAMAN PLASTICIZER Electrochemical and spectroscopic properties of electrospun PAN-based fibrous polymer electrolytes Article 10.1149/1.1887166 1 JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v.152, no.5, pp.A989 - A995 JOURNAL OF THE ELECTROCHEMICAL SOCIETY 152 5 A989 A995 scie scopus 000228521400021 2-s2.0-20444414877 Electrochemistry Materials Science, Coatings & Films Electrochemistry Materials Science Article POLYACRYLONITRILE-BASED ELECTROLYTES BINARY SOLVENT SYSTEMS LITHIUM-ION BATTERIES ETHYLENE CARBONATE GEL ELECTROLYTES TRANSPORT-PROPERTIES PHASE-DIAGRAMS CONDUCTIVITY RAMAN PLASTICIZER electrospinning PAN nanofiber polymer electrolyte