Syntheses and Electrochemical Properties of TEMPO Radical Substituted Silicones: Active Material for Organic Radical Batteries

A silicone‐based radical polymer 2 was synthesized by hydrosilylation of PMHS with 4‐allyl‐2,2,6,6‐tetramethylpiperidine‐N‐oxyl ether 1 in the presence of a platinum‐ or rhodium‐catalyst. A reversible redox peak of 2 at 3.56 V (vs. Li/Li+) was observed by CV measurements. A coin‐shaped cell of 2 sho...

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Published in:Macromolecular chemistry and physics 2009-09, Vol.210 (17), p.1402-1407
Main Authors: Suguro, Masahiro, Mori, Atsunori, Iwasa, Shigeyuki, Nakahara, Kentaro, Nakano, Kaichiro
Format: Article
Language:English
Subjects:
Batteries
Dehydrogenation
Discharge
Ethers
Hydrosilylation
lithium ion
organic radical
Radicals
rechargeable battery
silicone
Silicones
TEMPO
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cited_by cdi_FETCH-LOGICAL-c4241-fe25e4b16f0209b4d9e1f2f948650de1df419975473e077161bd674d5d5758053
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creator Suguro, Masahiro
Mori, Atsunori
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Nakano, Kaichiro
description A silicone‐based radical polymer 2 was synthesized by hydrosilylation of PMHS with 4‐allyl‐2,2,6,6‐tetramethylpiperidine‐N‐oxyl ether 1 in the presence of a platinum‐ or rhodium‐catalyst. A reversible redox peak of 2 at 3.56 V (vs. Li/Li+) was observed by CV measurements. A coin‐shaped cell of 2 shows a discharge capacity of 46 mAh · g−1, which is 47% of the theoretical capacity of 2 (98 mAh · g−1). A directly TEMPO‐substituted silicone, poly[methyl(2,2,6,6‐tetramethylpiperidine‐N‐oxyl‐4‐oxyl)siloxane] 3 was also obtained by rhodium‐catalyzed dehydrogenative alcoholysis of PMHS with TEMPO‐OH. The coin‐shaped cell of 3 shows a discharge capacity of 80 mAh · g−1, which is 69% of the theoretical capacity of 3 (116 mAh · g−1). The transition‐metal‐catalyzed reactions of PMHS with TEMPO derivatives afford silicone‐based organic radical polymers with interesting charge/discharge capabilities, making them promising candidates as active materials in rechargeable batteries.
doi_str_mv 10.1002/macp.200900251
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subjects Batteries
Dehydrogenation
Discharge
Ethers
Hydrosilylation
lithium ion
organic radical
Radicals
rechargeable battery
silicone
Silicones
TEMPO
title Syntheses and Electrochemical Properties of TEMPO Radical Substituted Silicones: Active Material for Organic Radical Batteries
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