Fast-Activating Reserve Power Sources: is Lead Cead Indeed?
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Fast-Activating Reserve Power Sources: is Lead Cead Indeed?
|
|
| Автор |
Shcheglov, P. A.
Samsonov, D. A. Pavlenkov, A. B. Kulova, T. L. Rychagov, A. Yu. Skundin, A. M. Postnova, E. Yu. |
|
| Тематика |
RESERVE POWER SOURCE
ACTIVATION TIME DISCHARGE LEAD DIOXIDE LEAD ZINC |
|
| Описание |
Received: 14.12.23. Revised: 10.01.24. Accepted: 14.01.24. Available online: 25.01.24.
The authors express their gratitude to the chief metallurgist Mr. Yu. M. Sidorov and the leading chemical engineers Ms. S. G. Kokoreva and Ms. S. N. Krichevtsova for their assis-tance in the quality control of electrode coatings and the transfer of the results of this study into the industrial pro-duction processes. The LLC “Melytec” is greatly acknowl-edged for providing access to the ZEM 15 scanning electron microscope. The improved low-temperature (down to –50 °C) performance of reserve power sources based on lead-acid systems is achieved. The Zn–HClO4–PbO2 system offers the elevated discharge voltage and short activation time but exhibits an unstable performance. Lead dioxide cathode material with the increased nanoporosity provides the improvement of low-temperature performance of the Pb–HClO4–PbO2 system. The suitability criterion for electrode materials consists in the maintenance of the low discharge overvoltage (0.1– 0.2 V) at lower temperatures. Improved reserve power sources of the Pb–HClO4–PbO2 system exhibit the unprecedentedly short activation time (less than 30 ms). The purpose of this research is to improve the performance and reduce the activation time of reserve power sources based on lead-acid systems at lower temperatures, down to –50 °C. Physico-chemical factors affecting the activation speed of reserve power sources based on Pb–HClO4–PbO2 and Zn–HClO4–PbO2 systems are investigated using chronopotentiometry, scanning electron microscopy, and standard contact porosimetry. Two approaches to the improvement of the low-temperature performance of power sources are used. The first one is based on the substitution of lead as anodic material with zinc. This allows the increase in discharge voltage and simultaneous decrease in activation time, but brings about the instability of discharge characteristics and, finally, deteriorates the reliability of power sources. The second approach is based on the use of PbO2 cathode material with enhanced nanoporosity. The chronopotentiometric method in galvanostatic mode is applied to the quality estimation of cathodes. The criterion of applicability of cathodes for reserve power sources consists in the low discharge overvoltage (0.1–0.2 V). Efficient performance of reserve power sources possessing the stable discharge voltage (1.5–1.8 V per cell) and the unprecedentedly short activation time (under 30 ms) even at lower temperatures (down to –50 °C) is achieved. The results are verified by fabrication and testing of pilot batches of miniaturized reserve power sources having microcells’ volume of 0.02 ml. The second approach to the improvement of power sources is transferred into the industrial production. This research was funded by JSC “NPO “Pribor” named after S. S. Golembiovsky”. |
|
| Дата |
2024-04-03T11:21:00Z
2024-04-03T11:21:00Z 2024 |
|
| Тип |
Article
|
|
| Идентификатор |
Fast-Activating Reserve Power Sources: is Lead Cead Indeed? / P. A. Shcheglov, D. A. Samsonov, A. B. Pavlenkov, T. L. Kulova, A. Yu. Rychagov, A. M. Skundin, E. Yu. Postnova // Chimica Techno Acta. — 2024. — Vol. 11, No. 1. — No. 202411103.
2411-1414 http://elar.urfu.ru/handle/10995/130148 https://elibrary.ru/item.asp?id=65118502 10.15826/chimtech.2024.11.1.03 |
|
| Язык |
en
|
|
| Связанные ресурсы |
Chimica Techno Acta. 2024. Vol. 11. № 1
|
|
| Издатель |
Уральский федеральный университет
Ural Federal University |
|