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Title: Effect of sulfur content in a sulfur-activated carbon composite on the electrochemical properties of a lithium/sulfur battery

Highlights: • The content of sulfur in activated carbon was controlled by solution process. • The sulfur electrode with low sulfur content shows the best performance. • The Li/S battery has capacity of 1360 mAh/g at 1 C and 702 mAh/g at 10 C. - Abstract: The content of sulfur in sulfur/activated carbon composite is controlled from 32.37 wt.% to 55.33 wt.% by a one-step solution-based process. When the sulfur content is limited to 41.21 wt.%, it can be loaded into the pores of an activated carbon matrix in a highly dispersed state. On the contrary, when the sulfur content is 55.33 wt.%, crystalline sulfur can be detected on the surface of the activated carbon matrix. The best electrochemical performance can be obtained for a sulfur electrode with the lowest sulfur content. The sulfur/activated carbon composite with 32.37 wt.% sulfur afforded the highest first discharge capacity of 1360 mAh g{sup −1} at 1 C rate and a large reversible capacity of 702 mAh g{sup −1} at 10 C (16.75 A/g)
Authors:
; ; ; ; ;  [1] ;  [2] ;  [3] ;  [4] ;  [1]
  1. School of Materials Science and Engineering, Gyeongsang National University, Jinju (Korea, Republic of)
  2. Department of Chemical & Biological Engineering, Gyeongsang National University, Jinju (Korea, Republic of)
  3. School of Chemistry and Forensic Science, University of Technology Sydney, Sydney, NSW 2007 (Australia)
  4. Advanced Analysis Center, Research Planning & Coordination Division, KIST, Seoul (Korea, Republic of)
Publication Date:
OSTI Identifier:
22475866
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 69; Conference: ISFM 2014: 6. international symposium on functional materials, Singapore (Singapore), 4-7 Aug 2014; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ACTIVATED CARBON; CAPACITY; CARBON; ELECTROCHEMISTRY; ELECTRODES; ENERGY STORAGE; LITHIUM-SULFUR BATTERIES; PERFORMANCE; SULFUR; SULFUR CONTENT; SURFACES; SYNTHESIS