TY - JOUR
T1 - Designing current collector/composite electrode interfacial structure of organic radical battery
AU - Yoshihara, Sunao
AU - Katsuta, Haruhiko
AU - Isozumi, Hiroshi
AU - Kasai, Masanori
AU - Oyaizu, Kenichi
AU - Nishide, Hiroyuki
PY - 2011/9/15
Y1 - 2011/9/15
N2 - Charge/discharge processes of organic radical batteries based on the radical polymer's redox reaction should be largely influenced by the structure and the composition of the composite electrodes. AC impedance measurement of the composite electrodes reveals a strong correlation between the overall electron transfer resistance of the composite electrode and the material of the current collector, and suggests that the electric conduction to the current collector through the contact resistance should be crucial. We also find that the adhesion and the contact area between the composite electrode and the current collector strongly influence the contact resistance rather than the work functions and the volume resistivities of the composite electrode and the current collector. It is also confirmed that the charge/discharge performance of the composite electrode is related to the overall electron transfer resistance of the composite electrode. These results indicate that the charge/discharge performance of the radical battery is dominated by the interfacial electron transfer processes at the current collector/carbon fiber interface. In fact, the composite electrode which has a high adhesion to the current collector shows a small overall electron transfer resistance and an excellent charge/discharge performance. The rate performance would be much improved by suitably designing the interfacial structure including adhesion and contact area.
AB - Charge/discharge processes of organic radical batteries based on the radical polymer's redox reaction should be largely influenced by the structure and the composition of the composite electrodes. AC impedance measurement of the composite electrodes reveals a strong correlation between the overall electron transfer resistance of the composite electrode and the material of the current collector, and suggests that the electric conduction to the current collector through the contact resistance should be crucial. We also find that the adhesion and the contact area between the composite electrode and the current collector strongly influence the contact resistance rather than the work functions and the volume resistivities of the composite electrode and the current collector. It is also confirmed that the charge/discharge performance of the composite electrode is related to the overall electron transfer resistance of the composite electrode. These results indicate that the charge/discharge performance of the radical battery is dominated by the interfacial electron transfer processes at the current collector/carbon fiber interface. In fact, the composite electrode which has a high adhesion to the current collector shows a small overall electron transfer resistance and an excellent charge/discharge performance. The rate performance would be much improved by suitably designing the interfacial structure including adhesion and contact area.
KW - Charging-discharging characteristics
KW - Composite electrode
KW - Radical polymer
KW - Secondary battery
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U2 - 10.1016/j.jpowsour.2010.10.092
DO - 10.1016/j.jpowsour.2010.10.092
M3 - Article
AN - SCOPUS:79959366325
VL - 196
SP - 7806
EP - 7811
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
IS - 18
ER -