Ultrahigh‐areal‐capacitance aqueous supercapacitors enabled by soft biomass‐derived porous carbon membrane

International Journal of Energy ResearchVolume 46, Issue 4 p. 4781-4793 RESEARCH ARTICLE Ultrahigh-areal-capacitance aqueous supercapacitors enabled by soft biomass-derived porous carbon membrane Mengxia Cui, Mengxia Cui School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China Key Laboratory of Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan, ChinaSearch for more papers by this authorFang Wang, Fang Wang School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China Key Laboratory of Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan, ChinaSearch for more papers by this authorZhengguo Zhang, Zhengguo Zhang School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China Key Laboratory of Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan, ChinaSearch for more papers by this authorShixiong Min, Corresponding Author Shixiong Min sxmin@nun.edu.cn orcid.org/0000-0002-4479-9788 School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China Key Laboratory of Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan, China Correspondence Shixiong Min, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, 750021, China. Email: sxmin@nun.edu.cnSearch for more papers by this author Mengxia Cui, Mengxia Cui School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China Key Laboratory of Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan, ChinaSearch for more papers by this authorFang Wang, Fang Wang School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China Key Laboratory of Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan, ChinaSearch for more papers by this authorZhengguo Zhang, Zhengguo Zhang School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China Key Laboratory of Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan, ChinaSearch for more papers by this authorShixiong Min, Corresponding Author Shixiong Min sxmin@nun.edu.cn orcid.org/0000-0002-4479-9788 School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China Key Laboratory of Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan, China Correspondence Shixiong Min, School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, 750021, China. Email: sxmin@nun.edu.cnSearch for more papers by this author First published: 14 November 2021 https://doi.org/10.1002/er.7472 Funding information: Foundation of Academic Top-notch Talent Support Program of the North Minzu University, Grant/Award Number: 2019BGBZ08; Fundamental Research Funds for the Central Universities of the North Minzu University, Grant/Award Number: FWNX41; Innovation and Entrepreneurship Projects for Returnees of Ningxia Province; Leading Talents Program of Science and Technology Innovation in Ningxia Province, Grant/Award Number: 2020GKLRLX14; Natural Science Foundation of Ningxia Province, Grant/Award Numbers: 2021AAC02016, 2021AAC03201; the Cooperative Scientific Research Project of Chunhui Plan of Ministry of Education of China, Grant/Award Number: 201900081 Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Summary Sustainable biomass-derived carbons in powdery forms have shown to be high-performance capacitive electrode materials for application in supercapacitors (SCs) due to their large specific surface area, distinct porous structure, and low cost; however, their practical applications are being largely hampered due to their powdery status-related issues including tedious electrode assembly process and insufficient capacitance and cycling stability. Herein, we develop a porous carbon membrane, termed as PECM, by direct carbonization of Pleurotus eryngii (PE) using KOH as activator. The as-fabricated PECM features a hierarchically nanostructure with high porosity, large specific surface area, and excellent electrolyte wettability, which cannot only afford a large usable active area for the interfacial adsorption of electrolyte ions but also supply fast diffusion pathways for electrolyte ions. Moreover, the as-fabricated PECM is doped with N and also has large amounts of O, S, and P-containing functional groups, which would be expected to contribute additional pseudocapacitance. More importantly, the as-fabricated PECM has excellent mechanical performance and can be directly used to assembly an aqueous symmetric SC device. Attributing to the above structural merits of PECM, the two-electrode symmetric SC assembled using two identical PECM-800 electrodes (~20 mg cm−2 for each electrode), exhibits excellent electrochemical performance with ultrahigh areal capacitance (4.6 F cm−2 at 10 mA cm−2), excellent long-term cycling stability (113% capacitance retention after 20 000 cycles), and superior energy densities of 0.24 to 0.09 mWh cm−2 at power densities of 5.20 to 51.9 mW cm−2. This work offers a new insight on employing biomass to prepare value-added and practically applicable carbon materials for the application in SCs. Open Research DATA AVAILABILITY STATEMENT The data that support the findings of this study are available from the corresponding author upon reasonable request. Supporting Information Filename Description er7472-sup-0001-Supinfo.docxWord 2007 document , 7.1 MB Appendix S1. Supplementary information. er7472-sup-0002-VideoS1.zipapplication/x-zip-compressed, 606.5 KB Video S1. Supplementary video. er7472-sup-0003-VideoS2.zipapplication/x-zip-compressed, 7.9 MB Video S2. Supplementary video. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article. Volume46, Issue425 March 2022Pages 4781-4793 RelatedInformation