{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,16]],"date-time":"2026-05-16T05:17:55Z","timestamp":1778908675092,"version":"3.51.4"},"reference-count":49,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2019,8,29]],"date-time":"2019-08-29T00:00:00Z","timestamp":1567036800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51502268, 51325203 and 51574205"],"award-info":[{"award-number":["51502268, 51325203 and 51574205"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Key Science and Technology Research Projects of Henan Provincial Education Department","award":["14B430023"],"award-info":[{"award-number":["14B430023"]}]},{"name":"Excellent Young Teacher Development Foundation of Zhengzhou University","award":["1421320050"],"award-info":[{"award-number":["1421320050"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>Novel N-doped carbon nanonet flakes (NCNFs), consisting of three-dimensional interconnected carbon nanotube and penetrable mesopore channels were synthesized in the assistance of a hybrid catalytic template of silica-coated-linear polyethyleneimine (PEI). Resorcinol-formaldehyde resin and melamine were used as precursors for carbon and nitrogen, respectively, which were spontaneously formed on the silica-coated-PEI template and then annealed at 700 \u00b0C in a N2 atmosphere to be transformed into the hierarchical 3D N-doped carbon nanonetworks. The obtained NCNFs possess high surface area (946 m2 g\u22121), uniform pore size (2\u20135 nm), and excellent electron and ion conductivity, which were quite beneficial for electrochemical double-layered supercapacitors (EDLSs). The supercapacitor synthesized from NCNFs electrodes exhibited both extremely high capacitance (up to 613 F g\u22121 at 1 A g\u22121) and excellent long-term capacitance retention performance (96% capacitive retention after 20,000 cycles), which established the current processing among the most competitive strategies for the synthesis of high performance supercapacitors.<\/jats:p>","DOI":"10.3390\/nano9091225","type":"journal-article","created":{"date-parts":[[2019,8,29]],"date-time":"2019-08-29T11:26:22Z","timestamp":1567077982000},"page":"1225","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Linear-Polyethyleneimine-Templated Synthesis of N-Doped Carbon Nanonet Flakes for High-performance Supercapacitor Electrodes"],"prefix":"10.3390","volume":"9","author":[{"given":"Dengchao","family":"Xia","sequence":"first","affiliation":[{"name":"School of Material Science and Engineering, Zhengzhou University, No.100 Kexue Ave, Zhengzhou 450001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Junpeng","family":"Quan","sequence":"additional","affiliation":[{"name":"School of Material Science and Engineering, Zhengzhou University, No.100 Kexue Ave, Zhengzhou 450001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guodong","family":"Wu","sequence":"additional","affiliation":[{"name":"School of Material Science and Engineering, Zhengzhou University, No.100 Kexue Ave, Zhengzhou 450001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xinling","family":"Liu","sequence":"additional","affiliation":[{"name":"College of Chemistry and Materials Science, Shanghai Normal University, No.100 Guilin Rd, Shanghai 200234, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7923-734X","authenticated-orcid":false,"given":"Zongtao","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Material Science and Engineering, Zhengzhou University, No.100 Kexue Ave, Zhengzhou 450001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2585-5665","authenticated-orcid":false,"given":"Haipeng","family":"Ji","sequence":"additional","affiliation":[{"name":"School of Material Science and Engineering, Zhengzhou University, No.100 Kexue Ave, Zhengzhou 450001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2076-8733","authenticated-orcid":false,"given":"Deliang","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Material Science and Engineering, Zhengzhou University, No.100 Kexue Ave, Zhengzhou 450001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Liying","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Material Science and Engineering, Zhengzhou University, No.100 Kexue Ave, Zhengzhou 450001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yu","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Material Science and Engineering, Zhengzhou University, No.100 Kexue Ave, Zhengzhou 450001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shasha","family":"Yi","sequence":"additional","affiliation":[{"name":"School of Material Science and Engineering, Zhengzhou University, No.100 Kexue Ave, Zhengzhou 450001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ying","family":"Zhou","sequence":"additional","affiliation":[{"name":"School of Material Science and Engineering, Zhengzhou University, No.100 Kexue Ave, Zhengzhou 450001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yanfeng","family":"Gao","sequence":"additional","affiliation":[{"name":"School of Material Science and Engineering, Zhengzhou University, No.100 Kexue Ave, Zhengzhou 450001, China"},{"name":"School of Material Science and Engineering, Shanghai University, No.99 Shangda Rd, Shanghai 200444, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ren-hua","family":"Jin","sequence":"additional","affiliation":[{"name":"Department of Material and Life Chemistry, Kanagawa University, 3-2-7 Rokkakubashi, Kanagawa-ku 221-8686, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,8,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"272","DOI":"10.1016\/j.mattod.2013.07.002","article-title":"Carbon nanomaterials for high-performance supercapacitors","volume":"16","author":"Chen","year":"2013","journal-title":"Mater. 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