{"title":"由二羧酸盐插层双氢氧化物合成的用于超级电容器的锂铝氧化物-碳纳米复合材料自支撑电极","authors":"Yongju Lee, Duk-Young Jung","doi":"10.1039/d4ta05640j","DOIUrl":null,"url":null,"abstract":"Lithium aluminium oxide–carbon composites on Al metal substrates (Al/LiAl<small><sub>5</sub></small>O<small><sub>8</sub></small>/C) were successfully synthesized, and their electrical properties were characterized. Sheet-type lithium aluminium layered double hydroxide (LiAl-LDH) was grown on Al metal (Al/S-LDH) and subjected to anion exchange to introduce aliphatic dicarboxylate into the interlayers through solvothermal treatment. The interlayer spacings of dicarboxylate intercalated LiAl-LDH on Al metal (Al/DC-LDH) were expanded from 9.1 Å to 21.4 Å of the (002) reflection in XRD measurement. Remarkable thickness changes of the LiAl-LDH were also observed in SEM data, indicating a strong correlation with the intercalation reaction of long-chain dicarboxylates. The pyrolysis of Al/DC-LDH above 500 °C provides nanostructured electrodes of Al/LiAl<small><sub>5</sub></small>O<small><sub>8</sub></small>/C nanocomposites, which contain graphitic carbon and an ordered nanostructure depending on the calcination temperatures. Al/LiAl<small><sub>5</sub></small>O<small><sub>8</sub></small>/C electrodes demonstrate improved electrochemical performance with enhanced durability better than Al/S-LDH electrodes, exhibiting an areal capacitance of 0.51 mF cm<small><sup>−2</sup></small> at a current density of 0.01 mA cm<small><sup>−2</sup></small>.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":10.7000,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Self-supporting electrodes of lithium aluminium oxide–carbon nanocomposites synthesized from dicarboxylate-intercalated layered double hydroxide for supercapacitors\",\"authors\":\"Yongju Lee, Duk-Young Jung\",\"doi\":\"10.1039/d4ta05640j\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Lithium aluminium oxide–carbon composites on Al metal substrates (Al/LiAl<small><sub>5</sub></small>O<small><sub>8</sub></small>/C) were successfully synthesized, and their electrical properties were characterized. Sheet-type lithium aluminium layered double hydroxide (LiAl-LDH) was grown on Al metal (Al/S-LDH) and subjected to anion exchange to introduce aliphatic dicarboxylate into the interlayers through solvothermal treatment. The interlayer spacings of dicarboxylate intercalated LiAl-LDH on Al metal (Al/DC-LDH) were expanded from 9.1 Å to 21.4 Å of the (002) reflection in XRD measurement. Remarkable thickness changes of the LiAl-LDH were also observed in SEM data, indicating a strong correlation with the intercalation reaction of long-chain dicarboxylates. The pyrolysis of Al/DC-LDH above 500 °C provides nanostructured electrodes of Al/LiAl<small><sub>5</sub></small>O<small><sub>8</sub></small>/C nanocomposites, which contain graphitic carbon and an ordered nanostructure depending on the calcination temperatures. Al/LiAl<small><sub>5</sub></small>O<small><sub>8</sub></small>/C electrodes demonstrate improved electrochemical performance with enhanced durability better than Al/S-LDH electrodes, exhibiting an areal capacitance of 0.51 mF cm<small><sup>−2</sup></small> at a current density of 0.01 mA cm<small><sup>−2</sup></small>.\",\"PeriodicalId\":82,\"journal\":{\"name\":\"Journal of Materials Chemistry A\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":10.7000,\"publicationDate\":\"2024-10-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Materials Chemistry A\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1039/d4ta05640j\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry A","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1039/d4ta05640j","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Self-supporting electrodes of lithium aluminium oxide–carbon nanocomposites synthesized from dicarboxylate-intercalated layered double hydroxide for supercapacitors
Lithium aluminium oxide–carbon composites on Al metal substrates (Al/LiAl5O8/C) were successfully synthesized, and their electrical properties were characterized. Sheet-type lithium aluminium layered double hydroxide (LiAl-LDH) was grown on Al metal (Al/S-LDH) and subjected to anion exchange to introduce aliphatic dicarboxylate into the interlayers through solvothermal treatment. The interlayer spacings of dicarboxylate intercalated LiAl-LDH on Al metal (Al/DC-LDH) were expanded from 9.1 Å to 21.4 Å of the (002) reflection in XRD measurement. Remarkable thickness changes of the LiAl-LDH were also observed in SEM data, indicating a strong correlation with the intercalation reaction of long-chain dicarboxylates. The pyrolysis of Al/DC-LDH above 500 °C provides nanostructured electrodes of Al/LiAl5O8/C nanocomposites, which contain graphitic carbon and an ordered nanostructure depending on the calcination temperatures. Al/LiAl5O8/C electrodes demonstrate improved electrochemical performance with enhanced durability better than Al/S-LDH electrodes, exhibiting an areal capacitance of 0.51 mF cm−2 at a current density of 0.01 mA cm−2.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.