Nonylbenzo-hexaquinone (NBHQ), a quinonoid polymer of low molecular weight, has been reinvestigated as a cathode material for Li cells. Its reduction mechanism gives rise at first, in a 3-electron process, to an irreversible species involving the formation of radical anions. Successively, a direct two-electron reduction of other quinone groups occurs. This second step, which involves 4 e in quasi-thermodynamic conditions, is reversible and allows cells of the type Li/LiClO4-PC,DME/NBHQ,C to be cycled for more than 500 cycles at the C/2 rate between 3.5 and 2.0 V. The average energy density during this cycling was 160 Wh/kg, based on the weight of the cathode material (additives included). © 1987.
Pasquali, M., Pistoia, G., Boschi, T., Tagliatesta, P. (1987). Redox mechanism and cycling behaviour of nonylbenzo-hexaquinone electrodes in Li cells. SOLID STATE IONICS, 23(4), 261-266.
Redox mechanism and cycling behaviour of nonylbenzo-hexaquinone electrodes in Li cells
BOSCHI, TRISTANO;TAGLIATESTA, PIETRO
1987-01-01
Abstract
Nonylbenzo-hexaquinone (NBHQ), a quinonoid polymer of low molecular weight, has been reinvestigated as a cathode material for Li cells. Its reduction mechanism gives rise at first, in a 3-electron process, to an irreversible species involving the formation of radical anions. Successively, a direct two-electron reduction of other quinone groups occurs. This second step, which involves 4 e in quasi-thermodynamic conditions, is reversible and allows cells of the type Li/LiClO4-PC,DME/NBHQ,C to be cycled for more than 500 cycles at the C/2 rate between 3.5 and 2.0 V. The average energy density during this cycling was 160 Wh/kg, based on the weight of the cathode material (additives included). © 1987.Questo articolo è pubblicato sotto una Licenza Licenza Creative Commons
