Abstract
Functional materials with designer morphologies are anticipated to be the next generation materials for energy storage applications. In this manuscript, we have developed a holistic approach to enhance the surface area and hence the properties of nanostructures by synthesizing coronal nanohybrids of graphene. These nanohybrids provide distinctive advantages in terms of performance and stability over vertically stacked nanocomposites reported in literature. Various double hydroxide materials self-assembled as coronal lamellae on graphene shells have been synthesized and systematically studied. These coronal nanohybrids result in about a threefold increase in energy storage capacity as compared to their traditionally synthesized nanocomposite counterparts. The 3D graphene-based nanofibrils in the synthesized coronal nanohybrids provide mechanical support and connect the nodes of the double hydroxide lattices to inhibit restacking. Complex morphologies such as coronal nanostructures increase the interaction surface of the nanostructure significantly. Such an approach is also expected to bring a paradigm shift in development of functional materials for various applications such as sensors, energy storage, and catalysis.
Highlights
Engineering morphologies of nanostructures by combining diverse configurations to enhance material properties is an effective approach to synthesize advanced functional materials
Incorporation of low-dimensional materials with carbonbased nanostructures is an effective approach for synthesizing materials and offers the combined advantages of both [4,5,6]
Graphene-based designer nanohybrids in the form of coronal morphologies have been synthesized with Co-Mn, Ni-Mn, and Ni-Co layered double hydroxides (LDHs) lamellae self-assembled radially outwards as a corona on the surface of reduced graphene oxide (rGO) shells connected by porous graphene networks
Summary
Engineering morphologies of nanostructures by combining diverse configurations to enhance material properties is an effective approach to synthesize advanced functional materials. One can exploit these designer nanohybrids to their full potential [22] In this perspective, we have developed a holistic approach in designing and synthesizing 3D coronal architectures of hybrid materials with porous graphene- (PG-) based nanowebs. We have developed a holistic approach in designing and synthesizing 3D coronal architectures of hybrid materials with porous graphene- (PG-) based nanowebs LDH materials that exhibit bulk redox reactions [23,24,25] and carbon materials that accumulate charge owing to the surface-limited processes [26,27,28] These architectures are synthesized with controlled geometry by encapsulating coronal hybrids of ultrathin LDH nanosheets of high redox activity and self-assembled radially overfunctionalized graphene shells, with complementary functionalities. These nanoarchitectures are expected to create a paradigm shift in the development of materials for energy storage applications and for other applications where surface interactions are extremely crucial, such as catalysis [29, 30], sensors [31, 32], drug delivery [33, 34], and flame retardants [35, 36]
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