A Covalent Black Phosphorus/Metal–Organic Framework Hetero‐nanostructure for High‐Performance Flexible Supercapacitors

Abstract

We develop hetero-nanostructured black phosphorus/metal-organic framework hybrids formed by P-O-Co covalent bonding based on ad esigned droplet microfluidic strategy consisting of confined and ultrafast microdroplet reactions.T he resulting hybrid exhibits large capacitance (1347 Fg À1 )i nK OH electrolytes due to its large specificsurface-area (632.47 m 2 g À1 ), well-developed micro-porosity (0.38 cm 3 g À1 ), and engineered electroactivity.F urthermore, the proposed 3D printing method allows to construct allintegrated solid-state supercapacitor,w hich maintains interconnected porous network, good interfacial adhesion, and robust flexibility for short-path diffusion and excessive accommodation of ions.C onsequently,t he fabricated flexible supercapacitor delivers ultrahigh volumetric energy density of 109.8 mWh cm À3 ,l arge capacitance of 506 Fcm À3 ,a nd good long-term stability of 12000 cycles.

Two-Dimensional Nanosheets-Based Soft Electro-Chemo-Mechanical Actuators: Recent Advances in Design, Construction, and Applications

“…88−91 Therefore, advanced nanostructures design (e.g. porous backbone, 30 vertical-aligned skeleton, 31 arrays interface, 32 and ordered network 33 ) and multicomponent material hybrids (high conductivity, 24 pseudocapacitive activity, 92 and mechanical flexibility 93 ), which can provide highly interconnected electron transfer pathways and smoothly directional and active channels for charge migration and storage, are highly important for the large deformation and fast response of ECMAs.…”

“…However, the easy sheet-to-sheet restacking by van der Waals interactions and moderate film-forming properties of key challenges of 2D nanomaterials result in the considerably lower SSA, impeded porous channels, blocked ion diffusion, charge storage, and mechanical flexibility. − Therefore, advanced nanostructures design ( e.g . porous backbone, vertical-aligned skeleton, arrays interface, and ordered network) and multicomponent material hybrids (high conductivity, pseudocapacitive activity, and mechanical flexibility), which can provide highly interconnected electron transfer pathways and smoothly directional and active channels for charge migration and storage, are highly important for the large deformation and fast response of ECMAs.…”

Recent advances and perspectives of 3D printed micro-supercapacitors: from design to smart integrated devices

“…Additionally, the 3D-printed LIC-(MOF-199@ZIF-67)-based MSCs showed excellent stability with 94% capacitance retention over 10 000 cycles. Recently, Chen et al 90 technology and a microfluidic method to prepare ordered anisotropic structures and further assemble all-integrated solid-state MSCs. BP/metal-organic heterostructure hybrids connected via covalent bond bridges (P-O-Co) were prepared using confinement and droplet microfluidics methods, and exhibited a welldeveloped porous structure and good electroactivity for energy storage performance.…”

3D‐Printed Wearable Electrochemical Energy Devices

“…The construction of hybrid‐dimensional nanostructures and the use of composite materials with the synergistic effect of both electrical double‐layer capacitive carbon materials and pseudocapacitive metal oxides or conducting polymers are effective approaches for improving the capacitance of MSCs. [ 59,159 ] For example, Tian et al. prepared a composite ink formulation using PVDF as a binder in N‐Methyl pyrrolidone (NMP) solvent, where 1D silver nanowires (NWs), 2D graphene nanosheets (NSs), and Fe 2 O 3 nanoparticles (NPs) work synergistically as active electrode materials ( Figure ).…”