TY - GEN
T1 - Redox-active nitroxide radical polymers
T2 - International Workshop on Advanced Material for New and Renewable Energy, AMNRE
AU - Waskitoaji, Wihatmoko
AU - Suga, Takeo
AU - Nishide, Hiroyuki
PY - 2009/12/1
Y1 - 2009/12/1
N2 - Robust but redox-active radical polymers bearing 2,2,6,6- tetramethylpiperidin-N-oxy (TEMPO) were investigated as a metal-free, green mediator/catalyst for the oxidation of alcohol derivatives, and as a new electrode-active and charge-storage material. The TEMPO-mediated oxidation of the primary alcohol group of the natural cellulose improved the water-dispersivity of cellulose, and the polymer-supported catalysts or redox resins allow facile removal of catalysts from products by simple filtration. Other radical molecule (e.g. galvinoxyl) was also used as a mediator, which is coupled with the molecular oxygen. A reversible one-electron redox reaction of TEMPO allowed its application as an electrode-active material featuring high cyclability (> 500 cycles), relatively high battery electrode capacity (100-135 mAh/g), and fast electrode kinetics, leading to the high power rate capability of the battery. The radical polymer-based electrodes also provided good processability and shape flexibility, which promised the paper-like and wearable energy-storage devices.
AB - Robust but redox-active radical polymers bearing 2,2,6,6- tetramethylpiperidin-N-oxy (TEMPO) were investigated as a metal-free, green mediator/catalyst for the oxidation of alcohol derivatives, and as a new electrode-active and charge-storage material. The TEMPO-mediated oxidation of the primary alcohol group of the natural cellulose improved the water-dispersivity of cellulose, and the polymer-supported catalysts or redox resins allow facile removal of catalysts from products by simple filtration. Other radical molecule (e.g. galvinoxyl) was also used as a mediator, which is coupled with the molecular oxygen. A reversible one-electron redox reaction of TEMPO allowed its application as an electrode-active material featuring high cyclability (> 500 cycles), relatively high battery electrode capacity (100-135 mAh/g), and fast electrode kinetics, leading to the high power rate capability of the battery. The radical polymer-based electrodes also provided good processability and shape flexibility, which promised the paper-like and wearable energy-storage devices.
KW - Catalyst
KW - Energy-storage devices
KW - Radical polymer
KW - TEMPO
UR - http://www.scopus.com/inward/record.url?scp=70549094258&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=70549094258&partnerID=8YFLogxK
U2 - 10.1063/1.3243242
DO - 10.1063/1.3243242
M3 - Conference contribution
AN - SCOPUS:70549094258
SN - 9780735407060
T3 - AIP Conference Proceedings
SP - 13
EP - 18
BT - International Workshop on Advanced Material for New and Renewable Energy, AMNRE
Y2 - 9 June 2009 through 11 June 2009
ER -