Browse > Article

The Effects of the Nano-sized Adsorbing Material on the Electrochemical Properties of Sulfur Cathode for Lithium/Sulfur Secondary Battery  

Song, Min-Sang (Department of materials Science & Engineering, Korea Advanced Institute of Science and Technology)
Han, Sang-Choel (Department of materials Science & Engineering, Korea Advanced Institute of Science and Technology)
Kim, Hyun-Seok (Department of materials Science & Engineering, Korea Advanced Institute of Science and Technology)
Ahn, Hyo-Jun (Dept. of metals & materials, Gyung-Sang National Univ.)
Lee, Jai-Young (Department of materials Science & Engineering, Korea Advanced Institute of Science and Technology)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.13, no.4, 2002 , pp. 259-269 More about this Journal
Abstract
A battery based on the lithium/elemental sulfur redox couple has the advantage of high theoretical specific capacity of 1,675 mAh/g-sulfur. However, Li/S battery has bad cyclic durability at room temperature due to sulfur active material loss resulting from lithium polysulfide dissolution. To improve the cycle life of Li/S battery, PEGDME (Poly(ethylene glycol) dimethyl ether) 500 containing 1M LiTFSI salt which has high viscosity was used as electrolyte to retard the polysulfide dissolution and nano-sized $Mg_{0.6}Ni_{0.4}O$ was added to sulfur cathode as additive to adsorb soluble polysulfide within sulfur cathode. From experimental results, the improvement of the capacity and cycle life of Li/S battery was observed( maximum discharge capacity : 1,185 mAh/g-sulfur, C50/C1 = 85 % ). Through the charge-discharge test, we knew that PEGDME 500 played a role of preventing incomplete charge-discharge $behavior^{1,2)$. And then, in sulfur dissolution analysis and rate capability test, we first confirmed that nano-sized $Mg_{0.6}Ni_{0.4}O$ had polysulfide adsorbing effect and catalytic effect of promoting the Li/S redox reaction. In addition, from BET surface area analysis, we also verified that it played the part of increasing the porosity of sulfur cathode.
Keywords
Li/S battery; Polysulfide; PEGDME 500; $Mg_{0.6}Ni_{0.4}O$; Adsorbing effect; Catalytic effect;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Sang-Cheol Han, Hyun-Seok Kim, Min-Sang Song : 'Nickel sulfide synthesized by ball milling as an attractive cathode material for rechargeable lithium batteries', J. Alloys and Compounds 2002 in press
2 D. Marmorstein, T.H. Yu, K.A. Striebel, E.J. Cains : 'Electrochemical performance of lithium/sulfur cells with three different polymer electrolytes', J. Power Sources, 89 (2000) 219-226   DOI   ScienceOn
3 Eugene S. Nimon, Mary Sukeshini, and Steven J. Visco : 'Effect of Surface Glass Coating on Stability of Li Deposit in Contact with Polysulfide Solutions and PEO-based Electrolyte', IMLB, 2002
4 Alexander Gorkovenko, Terje A. Skotheim and Zhe-Sheng Xu :'Cathodes comprising electroactive sulfur materials and secondary batteries using same', US Patent No. 6,210,831 Bl, 2001
5 G. L. Henriksen, T. Kaun, A. Jansen, J. Prakash : 'Advanced Cell Technology for High Performance $LiAl/FeS_2$ Secondary Batteries', Electrochemical Society Proceedings, vol. 98-11, 1998, pp. 302
6 William C. and Terje A. Skotheim : 'Overcharge protection systems for rechargeable batteries', US Patent No. 6,248,481 Bl, 2001
7 I. C. Vickerman : 'Catalysis Specialist Periodic Reports', The Chemical Society, London, Vol. 2, 1978, pp. 107
8 R. D. Rauh, K. M. Abraham, G. F. Pearson, Y. K. Suprenant, and S. B. Brummer, J. Electrochem. Soc., Vol. 126, 1979, pp. 523   DOI   ScienceOn
9 B. M. L. Rao, J. A. Shropshire, and J. Electrochem. Soc., 128, 5, 1981