Lithium superacid salts for secondary lithium batteries

Three newly prepared lithium superacid ‡ ‡ Superacid is defined as any Bronsted acid which is stronger than 100% sulfuric acid. salts of the type C n F 2 n + 1 SO 3 Li (where n is 4, 8 and 10) and CF 3SO 3Li and (CF 3SO 2) 2NLi were used as salts in polyethylene oxide (PEO) electrolytes. Our conduct...

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Bibliographic Details
Published in:Electrochimica acta 1995-10, Vol.40 (13), p.2277-2280
Main Authors: Nagasubramanian, G., Shen, D.H., Surampudi, S., Wang, Qunjie, Prakash, G.K.Surya
Format: Article
Language:English
Subjects:
Applied sciences
cathode capacity and lithium transport number
conductivity
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
lithium superacid salt
polyethylene oxide
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Summary:Three newly prepared lithium superacid ‡ ‡ Superacid is defined as any Bronsted acid which is stronger than 100% sulfuric acid. salts of the type C n F 2 n + 1 SO 3 Li (where n is 4, 8 and 10) and CF 3SO 3Li and (CF 3SO 2) 2NLi were used as salts in polyethylene oxide (PEO) electrolytes. Our conductivity data shows that among the salts investigated PEO electrolytes containing (CF 3SO 2) 2 NLi gave the highest conductivity followed by C 4F 9SO 3Li and C 3F 17SO 3Li. PEO electrolytes containing C 10F 21SO 3Li and CF 3SO 3Li showed a lower conductivity at room temperature than the rest. Experimental LiTiS 2 polymer cells containing either PEO-C 4F 9SO 3Li or PEO-(CF 3SO 2) 2NLi as electrolyte were fabricated and tested for cycle life performance. No significant loss in capacity was observed even after 50 to 100 cycles.
ISSN:0013-4686
1873-3859
DOI:10.1016/0013-4686(95)00177-G