Abstract: Embodiments described herein relate to batteries with centerpins. In some aspects, a battery can include an electrode assembly formed in an annulus with a void volume in a center of the annulus, the electrode assembly including an anode and a cathode, a centerpin disposed in the void volume, the centerpin including graphene particles suspended in a polymer, the centerpin in physical contact with the electrode assembly and configured to provide structural support for the electrode assembly, and a battery housing disposed around an outside surface of the electrode assembly. In some embodiments, the void volume can be a first void volume, and the centerpin can include a second void volume. In some embodiments, the centerpin can include a slit that extends lengthwise along a length of the centerpin, the slit being an extension of the second void volume.

Abstract: Embodiments described herein relate to electrodes containing yolk-sell electroactive materials. In some aspects, an anode can include a carbon shell having an outer surface and an inner volume, the carbon shell including a plurality of pinholes on the outer surface. The anode particle is disposed in the inner volume of the carbon shell, such that a portion of the inner volume includes a void space. The anode further includes a plurality of graphene flakes disposed on the outer surface of the carbon shell, the plurality of graphene flakes covering at least a portion of the pinholes. In some embodiments, at least about 50% of the inner volume of the carbon shell can include void space. In some embodiments, the plurality of graphene flakes can cover at least about 90% of the pinholes.

Abstract: Embodiments described herein can include a composition comprising a thermoset resin with a plurality of graphene flakes dispersed therein, each of the plurality of graphene flakes having a lateral dimension and a thickness. The composition further comprises a reinforcement material dispersed in the thermoset resin. At least about 90% of the plurality of graphene flakes are oriented such that the lateral dimension is within about 10 degrees of a parallel alignment with a horizontal plane. In some embodiments, at least about 95%, or at least about 99% of the plurality of graphene flakes are oriented such that the lateral dimension is within about 10 degrees of a parallel alignment with the horizontal plane. In some embodiments, the reinforcement material can include at least one of a plurality of fibers or a plurality of beads.

Abstract: Embodiments described herein relate to non-oxidized graphene-based anti-viral surfaces, and methods of producing the same. In some embodiments, a method of forming an anti-viral surface can include mixing a non-oxidized edge-functionalized graphene with a catalyst and a thermoset material to form a mixture, applying a high-shear mixing process to the mixture to form a mixed liquid, and coating the mixed liquid onto a base surface to form the anti-viral surface. In some embodiments, the method can further include chemically treating the graphene to produce the non-oxidized edge-functionalized graphene. In some embodiments, the thermoset material can include a thermoset matrix. In some embodiments, the method can include dispersing the non-oxidized edge-functionalized graphene into the thermoset matrix via the high-shear mixing. In some embodiments, dispersing the non-oxidized edge-functionalized graphene into the thermoset matrix can be via a ball mill, a high-shear mixer, and/or a homogenizer.

Abstract: A method of depositing nanowires including generating wells disposed on a patterned conductive film. The patterned conductive film includes well-sites. The patterned conducive film covers a portion of a surface of a substrate. Each of the wells is disposed proximate to a corresponding wellsite. The method includes applying a nanowire mixture to the wells and, after applying the nanowire mixture, at least one nanowire is deposited on a first portion and a second portion of the patterned conductive film by generating an electric field proximate to the patterned conductive film. The first portion and the second portion of the patterned conductive film are separated by a gap.