Cobalt tetrapyridinoporphyrazine nanoparticulates anchored on carbon nanotubes for long-voltage Li/SOCl2 batteries
Commercial lithium/thionyl chloride (Li/SOCl2) batteries cannot meet the 3.15 V platform required for most instruments. A hovenia acerba-like assembly constructed with cobalt tetrapyridinoporphyrazine of thickness of 5–15 nm is anchored on acid-functionalized multi-walled carbon nanotubes (CoTAP/MWC...
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Published in | Electrochimica acta Vol. 295; pp. 569 - 576 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
01.02.2019
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Subjects | |
Online Access | Get full text |
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Summary: | Commercial lithium/thionyl chloride (Li/SOCl2) batteries cannot meet the 3.15 V platform required for most instruments. A hovenia acerba-like assembly constructed with cobalt tetrapyridinoporphyrazine of thickness of 5–15 nm is anchored on acid-functionalized multi-walled carbon nanotubes (CoTAP/MWCNTs), which were prepared using an in situ solid synthesis process. The discharge time of Li/SOCl2 batteries with a voltage greater than 3.15 V catalyzed by CoTAP/MWCNTs is found to be 11 min longer than batteries without catalysts and 4 min longer than those catalyzed by CoTAP alone. The energy of Li/SOCl2 batteries with a voltage greater than 3.15 V catalyzed by CoTAP/MWCNTs is discovered to be 11.44-times higher than batteries with AF-MWCNTs and 6.17-times higher than those catalyzed by bulk CoTAP. This is due to the fact that more CoTAP ultrafine nanoparticulates are anchored on the AF-MWCNTs. These nanoparticulates provide more active sites for the catalytic reaction of SOCl2. The assemblies are shown to have an adsorption-coordination effect on Li ions and to delay the deposition of lithium chloride passive films enhancing battery voltage platforms.
A hovenia acerba-like assembly constructed with cobalt tetrapyridinoporphyrazine of thickness of 5–15 nm is anchored on acid-functionalized multi-walled carbon nanotubes (CoTAP/MWCNTs), which were prepared using an in situ solid synthesis process. The discharge time of Li/SOCl2 batteries with a voltage greater than 3.15 V catalyzed by CoTAP/MWCNTs is found to be 11 min longer than batteries without catalysts and 4 min longer than those catalyzed by CoTAP alone. [Display omitted]
•The CoTAP/MWCNTs display hovenia acerba-like nanostructure, providing more reaction active sites.•The CoTAP/MWCNTs delay the deposition of LiCl passive film for enhancing the reduction reaction of SOCl2.•The discharge time of batteries with a voltage greater than 3.15 V catalyzed by CoTAP/MWCNTs is 11 minutes.•The discharge energy of batteries catalyzed by the CoTAP/MWCNTs is 74% higher than pure CoTAP. |
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ISSN: | 0013-4686 1873-3859 |
DOI: | 10.1016/j.electacta.2018.10.178 |