Ordered assembly of fluorinated graphene with nano fuels for coupling reaction and application in microenergetic devices

Abstract High toughness, superior reactivity with high energy and pressure output at micro-size are the basic requirements for energy materials applied in microenergetic devices such as micro-thruster, micro-ignitor and micro-power sources. Herein, fluorinated graphene as multifunctional additive is employed to ordered assembly flexible Al-FG/B-FG film based on “brick & mortar” structured concept prepared by vacuum self-assembly. Graphene fluoride (FG), as the “brick”, integrates with fluorine rubber loading Al (aluminum) or B (boron) nanoparticles as two types "mortar" that are stacked alternately to assembly ordered structure and obtain strong toughness. The layered ordered Al-FG/B-FG could efficiently combine the high reaction kinetics of Al-FG and the ultra-high calorific value of B-FG to realize coupling reaction and achieve superior self-sustaining combustion at micro-size, release high-energy and pressure. Subsequently, Al-FG/B-FG film has been integrated in micro-ignitor and self-destructive devices to achieve ignition and damage functions. More importantly, Al-FG/B-FG film still maintains stable energy output characteristics in harsh environments and could achieve damage effects in only 20 microseconds applied in self-destructive devices. This work establishes an innovative configuration to design novel energy materials and apply in micro-devices.