Honeycomb porous MnO2 nanofibers assembled from radially grown nanosheets for aqueous supercapacitors with high working voltage and energy density

Hydrothermal synthesis of manganese oxide encapsulated multiporous carbon nanofibers for supercapacitors

“…5(d)). This performance is comparable to that reported for metal oxide-based devices [31,33,[37][38][39][40].…”

“…As shown in Figs. 4(d) and 4(e), M-MCNFs yield a high specific capacitance of 313 F·g −1 (645 mF·cm −2 ) based on the entire mass of the electrode material at a current density of 0.5 A·g −1 , which is comparable to that reported for other manganese oxide-based materials, such as MnO 2 /graphene/conducting polymer [30], SWCNTs@MnO 2 /polypyrrole [31], porous MnO 2 tubular arrays [32], and others [33][34][35][36]. In addition, 100% capacitance retention was achieved over 8,000 cycles ( Fig.…”

Materials and fabrication of electrode scaffolds for deposition of MnO2 and their true performance in supercapacitors

“…Electrons transfer from the anode to the cathode through the carbon substrate and pre-formed MnO 2 deposits. This model could well explain the growth of MnO 2 on the smooth surface and inside the CNTs [232], and could also help understanding the completely conversion of CNFs to fibre-like structures assembled by MnO 2 nanosheets after a sufficiently long reaction time (168 h) [247].…”

“…This has motivated numerous research interests concerning in-situ deposition of nanoscale MnO 2 within and onto nanostructured carbon scaffolds, including CNTs films [87,144,145,181], graphene foam [174], graphene fibre [157], 3D macroporous graphene frameworks [245], CMFs [49,172,173,246], CNFs papers [28,65,174,175,247], CNFs forests [183], etc. Recently, in-situ redox deposition of MnO 2 was further extended to metal oxides nanostructures by reaction between MnO À 4 and a pre-painted carbon coating on the metal oxides surface [63,106,107,117,248].…”

Controlled growth of nanostructured MnO2 on carbon nanotubes for high-performance electrochemical capacitors

“…In this respect, various A C C E P T E D M A N U S C R I P T carbonaceous supports including activated carbons [32,33], carbon nanotubes (CNTs) [34][35][36][37][38][39][40], carbon nanofibers (CNFs) [41][42][43][44], graphenes [45][46][47][48][49][50][51] and carbon aerogels [52,53], etc. have been employed to integrate with MnO 2 for fabricating hybrid electrode materials.…”