3D printing, i.e., additive manufacturing, is being progressively applied in lithium batteries to fabricate various electrodes and electrolytes due to its precisely designing the structure from nanoscale to macroscale. By...
With
the development of energy-storage and conversion technology
and pollution degradation technology, it is important to develop a
low-cost and mass-produced catalyst with high catalytic activities.
Graphynes are two-dimensional carbon materials made of sp and sp2 hybrid carbon atoms in accordance with certain rules. Theoretical
calculations indicate that graphynes provide promising potential applications
in catalysis due to their unique acetylene linkage, adjustable electronic
properties, uniform pore, high degrees of π-conjugated systems,
and excellent electron mobility. Additionally, the successful preparation
of graphynes has made great progress in their catalytic applications.
Therefore, this Review systematically outlines the recent studies
about the structures, electronic properties, and synthetic strategies
of graphynes, especially their applications in catalysis.
Nonuniform Li+ flux and lithiophilic sites cause uneven lithium deposition, which impedes the application of lithium metal batteries. Herein, a reduced graphene oxide (rGO)/Ti3C2Tx lattice with periodic printed holes is fabricated by 3D printing. Mesoporous structures formed by regularly assembled nanosheets provide abundant lithiophilic sites. The Li+ flux is regulated by the periodic printed holes prepared by 3D printing. The deposition of lithium is homogenized by the synergistic effect of uniform Li+ flux and abundant lithiophilic sites. The resultant 3D‐printed Li anode has excellent cycling stability up to 3000 h and a high average Coulombic efficiency of 98% after a long lifespan of ≈1000 h. Our work highlights the effect of the correlation between macroscopic and microscopic pores formed by 3D printing on inhibiting lithium dendrites, providing a novel pathway for highly 3D‐printed stable lithium metal anode.
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