Kim, Icpyo Kim, Chang Hyeon Choi, Sun Hwa Ahn, Jae-Pyoung Ahn, Jou-Hyeon Kim, Ki-Won Cairns, Elton J. Ahn, Hyo-Jun 2024-01-20T04:34:11Z 2024-01-20T04:34:11Z 2021-09-05 2016-03-01 0378-7753 https://pubs.kist.re.kr/handle/201004/124305 This study introduces a new flexible cathode that contains no binder, conductive additive and current collector, but instead consists solely of a sulfurized polyacrylonitrile nanofiber (SPAN) web which is prepared by a simple pyrolysis process with low cost raw materials. This not only exhibits good electrochemical properties, but also a high flexibility, rollability, and bendability to 180 degrees without fracture. Its feasibility as a cathode for a low cost and flexible Na/S battery is subsequently evaluated on the basis that S, PAN, and Na are cheap materials. The SPAN web delivers a high first discharge capacity of 604 mAh g(-1) - electrode (1473 mAh g(-1) - sulfur) at 0.01 C based on sulfur content. In cycle performance at 0.1 C, a first discharge capacity of 342 mAh g(-1) - electrode is obtained and remains over 266 mAh g(-1) electrode after 200 cycles along with the coulombic efficiency near 100% from the second cycle. In terms of rate capability, it is shown to be capable of delivering a capacity of as high as 71 mAh g(-1) at 1 C. The reversible electrochemical reaction of the SPAN web with Na is related to a reversible bond between the C S and S S bonds of the SPAN web. (C) 2015 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV SULFUR COMPOSITE CATHODE LITHIUM ELECTRONICS CELLS A singular flexible cathode for room temperature sodium/sulfur battery Article 10.1016/j.jpowsour.2015.12.035 1 JOURNAL OF POWER SOURCES, v.307, pp.31 - 37 JOURNAL OF POWER SOURCES 307 31 37 scie scopus 000370884000005 2-s2.0-84952781187 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article SULFUR COMPOSITE CATHODE LITHIUM ELECTRONICS CELLS Electrospinning Sulfurized polyacrylonitrile Nanofiber web Flexible electrode Sulfur cathode Sodium/sulfur battery