{"title":"木质素废弃物的高效转化及高能量密度不对称超级电容器C@MnCo2O4的自组装合成","authors":"Jiahui Mu, Cuihuan Li, Jiankang Zhang, Xianliang Song, Sheng Chen, Feng Xu","doi":"10.1016/j.gee.2022.09.010","DOIUrl":null,"url":null,"abstract":"<div><p>Lignin waste from the papermaking and biorefineries industry is a significantly promising renewable resource to prepare advanced carbon materials for diverse applications, such as the electrodes of supercapacitors; however, the improvement of their energy density remains a challenge. Here, we design a green and universal approach to prepare the composite electrode material, which is composed of lignin-phenol-formaldehyde resins derived hierarchical porous carbon (LR-HPC) as conductive skeletons and the self-assembly manganese cobaltite (MnCo<sub>2</sub>O<sub>4</sub>) nanocrystals as active sites. The synthesized C@MnCo<sub>2</sub>O<sub>4</sub> composite has an abundant porous structure and superior electronic conductivity, allowing for more charge/electron mass transfer channels and active sites for the redox reactions. The composite shows excellent electrochemical performance, such as the maximum specific capacitance of ∼726 mF cm<sup>−2</sup> at 0.5 mV s<sup>−1</sup>, due to the significantly enhanced interactive interface between LR-HPC and MnCo<sub>2</sub>O<sub>4</sub> crystals. The assembled all-solid-state asymmetric supercapacitor, with the LR-HPC and C@MnCo<sub>2</sub>O<sub>4</sub> as cathode and anode, respectively, exhibits the highest volumetric energy density of 0.68 mWh cm<sup>−3</sup> at a power density of 8.2 mW cm<sup>−3</sup>. Moreover, this device shows a high capacity retention ratio of ∼87.6% at 5 mA cm<sup>−2</sup> after 5000 cycles.</p></div>","PeriodicalId":12744,"journal":{"name":"Green Energy & Environment","volume":null,"pages":null},"PeriodicalIF":10.7000,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Efficient conversion of lignin waste and self-assembly synthesis of C@MnCo2O4 for asymmetric supercapacitors with high energy density\",\"authors\":\"Jiahui Mu, Cuihuan Li, Jiankang Zhang, Xianliang Song, Sheng Chen, Feng Xu\",\"doi\":\"10.1016/j.gee.2022.09.010\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Lignin waste from the papermaking and biorefineries industry is a significantly promising renewable resource to prepare advanced carbon materials for diverse applications, such as the electrodes of supercapacitors; however, the improvement of their energy density remains a challenge. Here, we design a green and universal approach to prepare the composite electrode material, which is composed of lignin-phenol-formaldehyde resins derived hierarchical porous carbon (LR-HPC) as conductive skeletons and the self-assembly manganese cobaltite (MnCo<sub>2</sub>O<sub>4</sub>) nanocrystals as active sites. The synthesized C@MnCo<sub>2</sub>O<sub>4</sub> composite has an abundant porous structure and superior electronic conductivity, allowing for more charge/electron mass transfer channels and active sites for the redox reactions. The composite shows excellent electrochemical performance, such as the maximum specific capacitance of ∼726 mF cm<sup>−2</sup> at 0.5 mV s<sup>−1</sup>, due to the significantly enhanced interactive interface between LR-HPC and MnCo<sub>2</sub>O<sub>4</sub> crystals. The assembled all-solid-state asymmetric supercapacitor, with the LR-HPC and C@MnCo<sub>2</sub>O<sub>4</sub> as cathode and anode, respectively, exhibits the highest volumetric energy density of 0.68 mWh cm<sup>−3</sup> at a power density of 8.2 mW cm<sup>−3</sup>. Moreover, this device shows a high capacity retention ratio of ∼87.6% at 5 mA cm<sup>−2</sup> after 5000 cycles.</p></div>\",\"PeriodicalId\":12744,\"journal\":{\"name\":\"Green Energy & Environment\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":10.7000,\"publicationDate\":\"2023-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Green Energy & Environment\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2468025722001418\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Green Energy & Environment","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2468025722001418","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Efficient conversion of lignin waste and self-assembly synthesis of C@MnCo2O4 for asymmetric supercapacitors with high energy density
Lignin waste from the papermaking and biorefineries industry is a significantly promising renewable resource to prepare advanced carbon materials for diverse applications, such as the electrodes of supercapacitors; however, the improvement of their energy density remains a challenge. Here, we design a green and universal approach to prepare the composite electrode material, which is composed of lignin-phenol-formaldehyde resins derived hierarchical porous carbon (LR-HPC) as conductive skeletons and the self-assembly manganese cobaltite (MnCo2O4) nanocrystals as active sites. The synthesized C@MnCo2O4 composite has an abundant porous structure and superior electronic conductivity, allowing for more charge/electron mass transfer channels and active sites for the redox reactions. The composite shows excellent electrochemical performance, such as the maximum specific capacitance of ∼726 mF cm−2 at 0.5 mV s−1, due to the significantly enhanced interactive interface between LR-HPC and MnCo2O4 crystals. The assembled all-solid-state asymmetric supercapacitor, with the LR-HPC and C@MnCo2O4 as cathode and anode, respectively, exhibits the highest volumetric energy density of 0.68 mWh cm−3 at a power density of 8.2 mW cm−3. Moreover, this device shows a high capacity retention ratio of ∼87.6% at 5 mA cm−2 after 5000 cycles.
期刊介绍:
Green Energy & Environment (GEE) is an internationally recognized journal that undergoes a rigorous peer-review process. It focuses on interdisciplinary research related to green energy and the environment, covering a wide range of topics including biofuel and bioenergy, energy storage and networks, catalysis for sustainable processes, and materials for energy and the environment. GEE has a broad scope and encourages the submission of original and innovative research in both fundamental and engineering fields. Additionally, GEE serves as a platform for discussions, summaries, reviews, and previews of the impact of green energy on the eco-environment.