title: Design of Advanced MnO/N-Gr 3D Walls through Polymer Cross-Linking for High-Performance Supercapacitor.
abstract: Three-dimensional, vertically aligned MnO/nitrogen-doped graphene (3D MnO/N-Gr) walls were prepared through facile solution-phase synthesis followed by thermal treatment. Polyvinylpyrrolidone (PVP) was strategically added to generate cross-links to simultaneously form 3D wall structures and to incorporate nitrogen atoms into the graphene network. The unique wall features of the as-prepared 3D MnO/N-Gr hybirdes provide a large surface area (91.516 m(2) g(-1)) and allow for rapid diffusion of the ion electrolyte, resulting in a high specific capacitance of 378 F g(-1) at 0.25 A g(-1) and an excellent charge/discharge stability (93.7% capacity retention after 8000 cycles) in aqueous 1 m Na2 SO4 solution as electrolyte. Moreover, the symmetric supercapacitors that were rationally designed by using 3D MnO/N-Gr hybrids exhibit outstanding electrochemical performance in an organic electrolyte with an energy density of 90.6 Wh kg(-1) and a power density of 437.5 W kg(-1).
authors.affiliation: School of Advanced Materials Science and Engineering, Sungkyunkwan University, 16419, 2006, Seobu-ro, Jangan-gu, Suwon-si, Gyeong gi-do, Republic of Korea.
authors.forename: Ngoc Quang
authors.initials: NQ
authors.lastname: Tran
authors.affiliation: School of Advanced Materials Science and Engineering, Sungkyunkwan University, 16419, 2006, Seobu-ro, Jangan-gu, Suwon-si, Gyeong gi-do, Republic of Korea.
authors.forename: Bong Kyun
authors.initials: BK
authors.lastname: Kang
authors.affiliation: School of Advanced Materials Science and Engineering, Sungkyunkwan University, 16419, 2006, Seobu-ro, Jangan-gu, Suwon-si, Gyeong gi-do, Republic of Korea.
authors.forename: Sintayehu Nibret
authors.initials: SN
authors.lastname: Tiruneh
authors.affiliation: School of Advanced Materials Science and Engineering, Sungkyunkwan University, 16419, 2006, Seobu-ro, Jangan-gu, Suwon-si, Gyeong gi-do, Republic of Korea. dhyoon@skku.edu.|SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, 16419, 2006, Seobu-ro, Jangan-gu, Suwon-si, Gyeong gi-do, Republic of Korea. dhyoon@skku.edu.
authors.forename: Dae Ho
authors.initials: DH
authors.lastname: Yoon
keywords: doping; graphene; hybrid materials; supercapacitors