A Universal Strategy for Constructing Seamless Graphdiyne on Metal Oxides to Stabilize the Electrochemical Structure and Interface

Abstract

applications, MOs are usually prepared into nanostructures with complex dimensions to enhance its performances, such as the 0D nanosphere, 1D nanorods, 2D nanosheets, and 3D hierarchical morphologies. [3,6] The nanostructured morphologies are beneficial to expose large surface area and interface, but severely reduce the conductivity, and structural and interfacial stabilities during the electrochemical processes. In them, the irreversible changes over the structure and interface are considered to be the main reason for hindering the practical applications of MOs. [3,7] Recent studies have shown that carbon components are necessary to improve the activity, conductivity, and stability of MOs, [8,9] and the all-carbon modifications are definitely more stable than other inorganic ones. It can be seen that the interfacial contact between the carbon components and MOs plays the critical role in integrating these advantages of all-carbon components and MOs. Until now, the efficient construction of such multifunctional interfaces is a challenging issue, because the prevailing all-carbon materials are commonly prepared under high temperature and cannot be seamlessly grown on the MOs by any top-down and bottom-up strategies. Especially, the all-carbon modification would become more difficult in the case of MOs with complex dimensions and variations. In order to achieve stable structure and interface of MOs, it is urgent to build a general strategy to fabricate an all-carbon protection layer under an endurable condition. The rising-star 2D carbon allotrope, graphdiyne (GDY), is a great complement of all-carbon material, and has incomparable advantages in terms of its structure engineering and preparation technology. [10][11][12][13] Theoretically, the sp-hybridized carbon atoms and the triangular cavities in the 2D conjugated network facilitate the formation of close interfacial contact with the active components (metal atoms and Si nanoparticles). [14][15][16] which has not been observed in the prevailing sp 2 -hybridized carbon materials (graphene and carbon nanotube). This special interaction is originated from sp-hybridized-carbon-rich structure, which offers new inspirations and opportunities for improving the interfacial ion and electron transfer processes and stability of MOs in the electrochemical energy-related fields. Although, some prominent properties of GDY have been explored in electrochemical actuator, catalysts, LIB anodes, and supercapacitor electrodes, [17][18][19][20][21] itsThe structural and interfacial stabilities of metal oxides (MOs) are key issues while facing the volumetric variation and intensive interfacial polarization in electrochemical applications, including lithium-ion batteries (LIBs), supercapacitors, and catalysts. The growth of a seamless all-carbon interfacial layer on MOs with complex dimensions is not only a scientific problem, but also a practical challenge in these fields. Here, the growth of graphdiyne under ultramild condition is successfully implemented in situ for coating MOs of...

High Voltage‐Stabilized Graphdiyne Cathode Interface

“…Preparation of GDY Precursor: The synthetic methods of hexakis[(trimethylsilyl)ethynyl]benzene (HEB) and the deprotection of trimethylsilyl group for the precursor HEB were according to previous reports. [23,31] The as-prepared HEB was dissolved in diethyl ether (1 mg mL −1 ) and stored in a refrigerator before in situ growth on the surface of cathode.…”

Asymmetric faradaic assembly of Bi2O3and MnO2for a high-performance hybrid electrochemical energy storage device

“…Currently, batteries and supercapacitors are two emerging and popular electrochemical energy storage devices that are widely available in the market, but they also possess some drawbacks that are contrary to each other. [4][5][6][7] For achieving high energy density, both devices rely on faradaic redox reactions. However, due to the distinct characteristics of the faradaic reactions in these devices they have pros and cons.…”

Spontaneously Splitting Copper Nanowires into Quantum Dots on Graphdiyne for Suppressing Lithium Dendrites

“…[1][2][3] These advantages are well suited to address some important scientific problems in many fundamental fields. [4] In particular for the ever-growing fields of energy storage, [5,6] catalyst, [7,8] and separation, [9][10][11] GDY has inspired scientists many innovative ideas. However, the controllable growth of wellordered GDY nanofilm still faces severe challenges.…”