Synthesis of A Novel Spirobisnitroxide Polymer and its Evaluation in an Organic Radical Battery
摘要:
A straightforward synthesis of a novel spirobisnitroxide 6 has been developed. Cyclovoltammetry of 6 revealed two distinct reversible oxidation/reduction steps separated by ca. 740 mV indicating the formation of the corresponding oxoammonium cations. Rhodium-catalyzed polymerization of 6 afforded the polyacetylene polymer 7 bearing the pending spirobisnitroxide groups. Additionally, cross-linked 7 was prepared in the presence of 3 mol % of N,N'-diprop-2-ynyl-oxalamide. If oxidation of both nitroxide groups is considered, 7 possesses an unprecedented high theoretical charge capacity of 174 mA h g(-1) Evaluation of the cross-linked polymer 7 as a cathode material for an organic radical battery showed very good cycling stability when the potential was kept below the oxidation potential of the five-membered nitroxide subunit of 6. A presumable irreversible degradation of the polymeric backbone of 7 occurred at higher potentials, limiting the experimentally obtained charge capacity to 73 mA h g(-1).
Synthesis of A Novel Spirobisnitroxide Polymer and its Evaluation in an Organic Radical Battery
摘要:
A straightforward synthesis of a novel spirobisnitroxide 6 has been developed. Cyclovoltammetry of 6 revealed two distinct reversible oxidation/reduction steps separated by ca. 740 mV indicating the formation of the corresponding oxoammonium cations. Rhodium-catalyzed polymerization of 6 afforded the polyacetylene polymer 7 bearing the pending spirobisnitroxide groups. Additionally, cross-linked 7 was prepared in the presence of 3 mol % of N,N'-diprop-2-ynyl-oxalamide. If oxidation of both nitroxide groups is considered, 7 possesses an unprecedented high theoretical charge capacity of 174 mA h g(-1) Evaluation of the cross-linked polymer 7 as a cathode material for an organic radical battery showed very good cycling stability when the potential was kept below the oxidation potential of the five-membered nitroxide subunit of 6. A presumable irreversible degradation of the polymeric backbone of 7 occurred at higher potentials, limiting the experimentally obtained charge capacity to 73 mA h g(-1).
Imidazolidinone nitroxides as electrode materials for energy storage devices
申请人:Nesvadba Peter
公开号:US20090274947A1
公开(公告)日:2009-11-05
The invention relates to a an electrical energy storage device, such as a capacitor or a secondary battery, utilizing as active element the oxidation and reduction cycle of a sterically hindered imidazolidinone nitroxide radical. Further aspects of the invention are a method for providing such an energy storage device, the use of the respective compounds as active elements in energy storage devices and selected novel imidazolidinone nitroxide compounds.
IMIDAZOLIDINONE NITROXIDES AS ELECTRODE MATERIALS FOR ENERGY STORAGE DEVICES
申请人:Ciba Holding Inc.
公开号:EP2062311A2
公开(公告)日:2009-05-27
[EN] IMIDAZOLIDINONE NITROXIDES AS ELECTRODE MATERIALS FOR ENERGY STORAGE DEVICES<br/>[FR] NITROXYDES D'IMIDAZOLIDINONE COMME MATÉRIAUX D'ÉLECTRODE POUR DES DISPOSITIFS DE STOCKAGE D'ÉNERGIE
申请人:CIBA SC HOLDING AG
公开号:WO2008031733A2
公开(公告)日:2008-03-20
[EN] The invention relates to a an electrical energy storage device, such as a capacitor or a secondary battery, utilizing as active element the oxidation and reduction cycle of a sterically hindered imidazolidinone nitroxide radical. Further aspects of the invention are a method for providing such an energy storage device, the use of the respective compounds as active elements in energy storage devices and selected novel imidazolidinone nitroxide compounds. [FR] L'invention concerne un dispositif de stockage d'énergie électrique, tel qu'un condensateur ou une batterie secondaire, utilisant comme élément actif le cycle d'oxydation et de réduction d'un radical de nitroxyde d'imidazolidinone à encombrement stérique. D'autres aspects de l'invention sont constitués par un procédé pour fournir un tel dispositif de stockage d'énergie, l'utilisation des composés respectifs en tant qu'éléments actifs dans des dispositifs de stockage d'énergie, et par de nouveaux composés de nitroxyde d'imidazolidinone sélectionnés.
Synthesis of A Novel Spirobisnitroxide Polymer and its Evaluation in an Organic Radical Battery
A straightforward synthesis of a novel spirobisnitroxide 6 has been developed. Cyclovoltammetry of 6 revealed two distinct reversible oxidation/reduction steps separated by ca. 740 mV indicating the formation of the corresponding oxoammonium cations. Rhodium-catalyzed polymerization of 6 afforded the polyacetylene polymer 7 bearing the pending spirobisnitroxide groups. Additionally, cross-linked 7 was prepared in the presence of 3 mol % of N,N'-diprop-2-ynyl-oxalamide. If oxidation of both nitroxide groups is considered, 7 possesses an unprecedented high theoretical charge capacity of 174 mA h g(-1) Evaluation of the cross-linked polymer 7 as a cathode material for an organic radical battery showed very good cycling stability when the potential was kept below the oxidation potential of the five-membered nitroxide subunit of 6. A presumable irreversible degradation of the polymeric backbone of 7 occurred at higher potentials, limiting the experimentally obtained charge capacity to 73 mA h g(-1).