Conductive polymer-mediated 2D and 3D arrays of Mn₃O₄ nanoblocks and mesoporous conductive polymers as their replicas

Abstract

Orientation-controlled 2D and 3D microarrays of Mn3O4 nanocuboids that were mediated by a conductive polymer were fabricated by evaporation-induced self-assembly of the oxide nanoblocks and subsequent polymerization of pyrrole in the interparticle spaces. Free-standing mesoporous polypyrroles (PPy) having chain- and square-grid-like nanovoid arrays were obtained as replicas of the composite assemblies by dissolving the oxide nanoblocks. The PPy-mediated manganese oxide arrays exhibited stable electrochemical performance as an ultrathin anode of a lithium-ion secondary battery.

Electrochemical construction of three-dimensional porous Mn3O4 nanosheet arrays as an anode for the lithium ion battery

“…45 For Mn 3 O 4 , there are few reports about self-supported Mn 3 O 4 as an anode for the lithium ion battery. 23,46,47 Mn 3 O 4 -coated carbon nanofibers were respectively supported on Cu foam 23 and a reversible capacity of 1210.4 mA h g À1 remained after 50 cycles at a current density of 100 mA g À1 , and remained greater than 300 mA h g À1 at 5000 mA g À1 . Liu et al 46 fabricated flexible and binder-free Mn 3 O 4 nanorods (NRs)/reduced graphene oxide (rGO) hybrid papers with unique 3D nanoporous networks by filtration and a hydrothermal reduction process.…”

“…Liu et al 46 fabricated flexible and binder-free Mn 3 O 4 nanorods (NRs)/reduced graphene oxide (rGO) hybrid papers with unique 3D nanoporous networks by filtration and a hydrothermal reduction process. Nakagawa et al 47 fabricated 2D and 3D ordered arrays of Mn 3 O 4 nanocuboids that were mediated by the conductive polymer by the polymerization of pyrrole in the interparticle spaces, and at a high current rate of 10 C, they showed a reversible capacity of over 400 mA h g À1 . Nano-architectured Cu nanowires arrays were fabricated by Wang et al via cathodic electrodeposition with anodized aluminum oxide (AAO) templates and were used as the substrate to grow a Mn 3 O 4 film.…”

Evaporation-driven regularization of crystallographically ordered arrangements of truncated nanoblocks: from 1D chains to 2D rhombic superlattices

“…In our previous work, we have reported that the ordered arrays of Mn 3 O 4 incorporated with polypyrrole exhibited a high capacity as an anode of lithium-ion battery. 30 In summary, we fabricated various types of ordered 2D superarchitectures consisting of truncated Mn 3 O 4 nanoblocks by tuning the assembly rate. The anisotropic shape of the building blocks is essential for controlling the orientation of the crystal lattice in the superlattices.…”