Structural evolution and thermal conductivity of flexible graphite films prepared by carboxylic graphene/polyimide

Ultralight and High Thermal Conductive Current Collector Derived from Polyimide for Advanced LIBs

“…From the high resolution of Figure 2f, the lattice fringe spacing was measured to be ∼0.352 nm according to the (002) plane of carbon. 30 The large-area uninterrupted lattice fringe showed that the crystallinity of GFT was very good, and its related physical and electrical properties should also be relatively excellent.…”

“…As a new type of heat dissipation material, a graphene-like thermal film (hereafter shortened as GTF) derived from polyimide shows special characteristics of lower thermal resistance (thermal conductivity of ≥1400 W/m K), lighter weight (density of ∼1.5 g/cm 3 ), flexibility, and ultra-thin thickness (10–30 μm). − Therefore, it is very suitable as a new type of current collector for lightweight/high-performance LIBs. However, compared with the commercial copper foil, the graphene-like thermal film shows poor conductivity. ,, This limits its direct application as a current collector, and its surface must be metalized to further improve its conductivity.…”

“…However, compared with the commercial copper foil, the graphene-like thermal film shows poor conductivity. 30,35,36 This limits its direct application as a current collector, and its surface must be metalized to further improve its conductivity.…”

Polyimide-derived graphite barrier layer adhered to seed crystals to improve the quality of grown silicon carbide

“…On the other hand, the d-spacing was 0.3419 nm for BP-P-SiCH 3 -G. The decrease in d-spacing indicated the increase in graphitization degree. 17,20,[23][24][25][26][27] The degree of graphitization was further estimated, according to the following empirical formula. 16,23,25,28 G ¼ 0:344 À d 002 0:344 À 0:3354 Â 100%…”

Structural Effect of Polyimide Precursors on Highly Thermally Conductive Graphite Films

“…They have remarkably high mechanical strength, thermal stability, and chemical and radiation resistance. − Recently, PIs have attracted much attention as effective carbon precursors because of their unique molecular structure and high carbon yield. Various studies have demonstrated that PIs can be converted into carbon materials using simple carbonization and graphitization procedures. − There are many ways to improve the heat dissipation performance of graphite films. One is to introduce a hybrid component such as graphene, iron, or silicon carbide into the polymer matrix.…”