Su-xia QI , Tao YANG , Yan SONG , Ning ZHAO , Jun-qing LIU , Xiao-dong TIAN , Jin-ru WU , Hui LI , Zhan-jun LIU
{"title":"沥青馏分氧化对衍生碳材料结构和储钠性能的影响","authors":"Su-xia QI , Tao YANG , Yan SONG , Ning ZHAO , Jun-qing LIU , Xiao-dong TIAN , Jin-ru WU , Hui LI , Zhan-jun LIU","doi":"10.1016/S1872-5805(25)60961-9","DOIUrl":null,"url":null,"abstract":"<div><div>Pitch produced by the liquefaction of coal was divided into two fractions: soluble in toluene (TS) and insoluble in toluene but soluble in pyridine (TI-PS), and their differences in molecular structure and oxidation activity were studied. Several different carbon materials were produced from them by oxidation in air (350 °C, 300 mL/min) followed by carbonization (1000 °C in Ar), and the effect of the cross-linked structure on their structure and sodium storage properties was investigated. The results showed that the two pitch fractions were obviously different after the air oxidation. The TS fraction with a low degree of condensation and abundant side chains had a stronger oxidation activity and thus introduced more cross-linked oxygen-containing functional groups C(O)―O which prevented carbon layer rearrangement during the carbonization. As a result, a disordered hard carbon with more defects was formed, which improved the electrochemical performance. Therefore, the carbon materials derived from TS (O-TS-1000) had an obvious disordered structure and a larger layer spacing, giving them better sodium storage performance than those derived from the TI-PS fraction (O-TI-PS-1000). The specific capacity of O-TS-1000 was about 250 mAh/g at 20 mA/g, which was 1.67 times higher than that of O-TI-PS-1000 (150 mAh/g).\n\t\t\t\t<span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (107KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span></div></div>","PeriodicalId":19719,"journal":{"name":"New Carbon Materials","volume":"40 2","pages":"Pages 409-421"},"PeriodicalIF":5.7000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Impact of pitch fraction oxidation on the structure and sodium storage properties of derived carbon materials\",\"authors\":\"Su-xia QI , Tao YANG , Yan SONG , Ning ZHAO , Jun-qing LIU , Xiao-dong TIAN , Jin-ru WU , Hui LI , Zhan-jun LIU\",\"doi\":\"10.1016/S1872-5805(25)60961-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Pitch produced by the liquefaction of coal was divided into two fractions: soluble in toluene (TS) and insoluble in toluene but soluble in pyridine (TI-PS), and their differences in molecular structure and oxidation activity were studied. Several different carbon materials were produced from them by oxidation in air (350 °C, 300 mL/min) followed by carbonization (1000 °C in Ar), and the effect of the cross-linked structure on their structure and sodium storage properties was investigated. The results showed that the two pitch fractions were obviously different after the air oxidation. The TS fraction with a low degree of condensation and abundant side chains had a stronger oxidation activity and thus introduced more cross-linked oxygen-containing functional groups C(O)―O which prevented carbon layer rearrangement during the carbonization. As a result, a disordered hard carbon with more defects was formed, which improved the electrochemical performance. Therefore, the carbon materials derived from TS (O-TS-1000) had an obvious disordered structure and a larger layer spacing, giving them better sodium storage performance than those derived from the TI-PS fraction (O-TI-PS-1000). The specific capacity of O-TS-1000 was about 250 mAh/g at 20 mA/g, which was 1.67 times higher than that of O-TI-PS-1000 (150 mAh/g).\\n\\t\\t\\t\\t<span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (107KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span></div></div>\",\"PeriodicalId\":19719,\"journal\":{\"name\":\"New Carbon Materials\",\"volume\":\"40 2\",\"pages\":\"Pages 409-421\"},\"PeriodicalIF\":5.7000,\"publicationDate\":\"2025-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"New Carbon Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1872580525609619\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"Materials Science\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"New Carbon Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1872580525609619","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Materials Science","Score":null,"Total":0}
Impact of pitch fraction oxidation on the structure and sodium storage properties of derived carbon materials
Pitch produced by the liquefaction of coal was divided into two fractions: soluble in toluene (TS) and insoluble in toluene but soluble in pyridine (TI-PS), and their differences in molecular structure and oxidation activity were studied. Several different carbon materials were produced from them by oxidation in air (350 °C, 300 mL/min) followed by carbonization (1000 °C in Ar), and the effect of the cross-linked structure on their structure and sodium storage properties was investigated. The results showed that the two pitch fractions were obviously different after the air oxidation. The TS fraction with a low degree of condensation and abundant side chains had a stronger oxidation activity and thus introduced more cross-linked oxygen-containing functional groups C(O)―O which prevented carbon layer rearrangement during the carbonization. As a result, a disordered hard carbon with more defects was formed, which improved the electrochemical performance. Therefore, the carbon materials derived from TS (O-TS-1000) had an obvious disordered structure and a larger layer spacing, giving them better sodium storage performance than those derived from the TI-PS fraction (O-TI-PS-1000). The specific capacity of O-TS-1000 was about 250 mAh/g at 20 mA/g, which was 1.67 times higher than that of O-TI-PS-1000 (150 mAh/g).
期刊介绍：
New Carbon Materials is a scholarly journal that publishes original research papers focusing on the physics, chemistry, and technology of organic substances that serve as precursors for creating carbonaceous solids with aromatic or tetrahedral bonding. The scope of materials covered by the journal extends from diamond and graphite to a variety of forms including chars, semicokes, mesophase substances, carbons, carbon fibers, carbynes, fullerenes, and carbon nanotubes. The journal's objective is to showcase the latest research findings and advancements in the areas of formation, structure, properties, behaviors, and technological applications of carbon materials. Additionally, the journal includes papers on the secondary production of new carbon and composite materials, such as carbon-carbon composites, derived from the aforementioned carbons. Research papers on organic substances will be considered for publication only if they have a direct relevance to the resulting carbon materials.
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