Effect of PAN Oxidation on the Electrochemical Lithium Insertion/Deinsertion Behavior of Resultant Carbons
The effect of polyacrylonitrile (PAN) oxidation on the properties and electrochemical lithium insertion/deinsertion behavior of carbons produced in the temperature range of 1000–1150°C has been assessed. Air-treatment at 220 and 240°C modifies essentially the carbonization behavior of polymer leadin...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2015/370906 |
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| author | Aleksandra Piotrowska Krzysztof Kierzek Jacek Machnikowski |
| author_facet | Aleksandra Piotrowska Krzysztof Kierzek Jacek Machnikowski |
| author_sort | Aleksandra Piotrowska |
| collection | DOAJ |
| description | The effect of polyacrylonitrile (PAN) oxidation on the properties and electrochemical lithium insertion/deinsertion behavior of carbons produced in the temperature range of 1000–1150°C has been assessed. Air-treatment at 220 and 240°C modifies essentially the carbonization behavior of polymer leading to materials with developed microporosity and enhanced oxygen content in contrast to practically nonporous pristine PAN-based carbon. The extent of the modification increases with the oxidation depth and decreases with HTT. Galvanostatic charge/discharge reveals typical hard carbons characteristics of all the materials. PAN-based carbon heat-treated at 1050°C represents most promising anodic performance. It gives reversible capacity (Crev) near 420 mAh g−1 with a reasonable coulombic efficiency during cycling of ~99% and a moderate low voltage capacity of 100 mAh g−1. Extensive oxidation enhances overall 1st discharge cycle capacity to 870 mAh g−1 and Crev to 560 mAh g−1; however, large irreversible capacity (Cirr) and poor cycleability are serious drawbacks of all carbons from oxidized PAN. Pyrolytic carbon coating using methane CVD at 830°C is effective in suppressing Cirr by about 30% but the cycleability remains nonacceptable. |
| format | Article |
| id | doaj-art-fd7ae4ca1bce46f58e6c63f95c827c7c |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-fd7ae4ca1bce46f58e6c63f95c827c7c2025-02-03T05:44:56ZengWileyJournal of Chemistry2090-90632090-90712015-01-01201510.1155/2015/370906370906Effect of PAN Oxidation on the Electrochemical Lithium Insertion/Deinsertion Behavior of Resultant CarbonsAleksandra Piotrowska0Krzysztof Kierzek1Jacek Machnikowski2Division of Polymer and Carbonaceous Materials, Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, PolandDivision of Polymer and Carbonaceous Materials, Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, PolandDivision of Polymer and Carbonaceous Materials, Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, PolandThe effect of polyacrylonitrile (PAN) oxidation on the properties and electrochemical lithium insertion/deinsertion behavior of carbons produced in the temperature range of 1000–1150°C has been assessed. Air-treatment at 220 and 240°C modifies essentially the carbonization behavior of polymer leading to materials with developed microporosity and enhanced oxygen content in contrast to practically nonporous pristine PAN-based carbon. The extent of the modification increases with the oxidation depth and decreases with HTT. Galvanostatic charge/discharge reveals typical hard carbons characteristics of all the materials. PAN-based carbon heat-treated at 1050°C represents most promising anodic performance. It gives reversible capacity (Crev) near 420 mAh g−1 with a reasonable coulombic efficiency during cycling of ~99% and a moderate low voltage capacity of 100 mAh g−1. Extensive oxidation enhances overall 1st discharge cycle capacity to 870 mAh g−1 and Crev to 560 mAh g−1; however, large irreversible capacity (Cirr) and poor cycleability are serious drawbacks of all carbons from oxidized PAN. Pyrolytic carbon coating using methane CVD at 830°C is effective in suppressing Cirr by about 30% but the cycleability remains nonacceptable.http://dx.doi.org/10.1155/2015/370906 |
| spellingShingle | Aleksandra Piotrowska Krzysztof Kierzek Jacek Machnikowski Effect of PAN Oxidation on the Electrochemical Lithium Insertion/Deinsertion Behavior of Resultant Carbons Journal of Chemistry |
| title | Effect of PAN Oxidation on the Electrochemical Lithium Insertion/Deinsertion Behavior of Resultant Carbons |
| title_full | Effect of PAN Oxidation on the Electrochemical Lithium Insertion/Deinsertion Behavior of Resultant Carbons |
| title_fullStr | Effect of PAN Oxidation on the Electrochemical Lithium Insertion/Deinsertion Behavior of Resultant Carbons |
| title_full_unstemmed | Effect of PAN Oxidation on the Electrochemical Lithium Insertion/Deinsertion Behavior of Resultant Carbons |
| title_short | Effect of PAN Oxidation on the Electrochemical Lithium Insertion/Deinsertion Behavior of Resultant Carbons |
| title_sort | effect of pan oxidation on the electrochemical lithium insertion deinsertion behavior of resultant carbons |
| url | http://dx.doi.org/10.1155/2015/370906 |
| work_keys_str_mv | AT aleksandrapiotrowska effectofpanoxidationontheelectrochemicallithiuminsertiondeinsertionbehaviorofresultantcarbons AT krzysztofkierzek effectofpanoxidationontheelectrochemicallithiuminsertiondeinsertionbehaviorofresultantcarbons AT jacekmachnikowski effectofpanoxidationontheelectrochemicallithiuminsertiondeinsertionbehaviorofresultantcarbons |