Abstract
To overcome small capacities at high discharge rates in Li/iron-phthalocyanine (FePc) secondary cells, the effect of particle size on FePc is investigated. Large particle FePc is obtained by sublimation and gas evaporation is used to prepare FePc ultrafine particles. The discharge capacity at 0.1 mA/cm2 increases with increasing particle size (ultrafine particles < starting powders < single crystals). The relatively low discharge capacity of ultrafine particles at low discharge rate may be due to the low crystallinity. The order of discharge capacity, however, is reversed at high discharge rates over 0.3 mA/cm2. This tendency is consistent with the result of Li diffusivity measurements. The large discharge capacity of ultrafine particles at high discharge rates must be a product of the large surface area. From these results, ultrafine FePc particles are found to be a good organic cathode material at high discharge rates.
| Original language | English |
|---|---|
| Pages (from-to) | 2437-2440 |
| Number of pages | 4 |
| Journal | Journal of the Electrochemical Society |
| Volume | 136 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1989 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Electrochemistry
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Surfaces and Interfaces
Cite this
Effect of Particle Size on Iron-Phthalocyanine Cathodes in Secondary Lithium Cells. / Okada, Shigeto; Yamaki, Jun ichi.
In: Journal of the Electrochemical Society, Vol. 136, No. 9, 1989, p. 2437-2440.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of Particle Size on Iron-Phthalocyanine Cathodes in Secondary Lithium Cells
AU - Okada, Shigeto
AU - Yamaki, Jun ichi
PY - 1989
Y1 - 1989
N2 - To overcome small capacities at high discharge rates in Li/iron-phthalocyanine (FePc) secondary cells, the effect of particle size on FePc is investigated. Large particle FePc is obtained by sublimation and gas evaporation is used to prepare FePc ultrafine particles. The discharge capacity at 0.1 mA/cm2 increases with increasing particle size (ultrafine particles < starting powders < single crystals). The relatively low discharge capacity of ultrafine particles at low discharge rate may be due to the low crystallinity. The order of discharge capacity, however, is reversed at high discharge rates over 0.3 mA/cm2. This tendency is consistent with the result of Li diffusivity measurements. The large discharge capacity of ultrafine particles at high discharge rates must be a product of the large surface area. From these results, ultrafine FePc particles are found to be a good organic cathode material at high discharge rates.
AB - To overcome small capacities at high discharge rates in Li/iron-phthalocyanine (FePc) secondary cells, the effect of particle size on FePc is investigated. Large particle FePc is obtained by sublimation and gas evaporation is used to prepare FePc ultrafine particles. The discharge capacity at 0.1 mA/cm2 increases with increasing particle size (ultrafine particles < starting powders < single crystals). The relatively low discharge capacity of ultrafine particles at low discharge rate may be due to the low crystallinity. The order of discharge capacity, however, is reversed at high discharge rates over 0.3 mA/cm2. This tendency is consistent with the result of Li diffusivity measurements. The large discharge capacity of ultrafine particles at high discharge rates must be a product of the large surface area. From these results, ultrafine FePc particles are found to be a good organic cathode material at high discharge rates.
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UR - http://www.scopus.com/inward/citedby.url?scp=0024731463&partnerID=8YFLogxK
U2 - 10.1149/1.2097412
DO - 10.1149/1.2097412
M3 - Article
VL - 136
SP - 2437
EP - 2440
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
SN - 0013-4651
IS - 9
ER -