High power Supercapacitor 3 Cost effectiveness 2 Fiber amplifiers 2 Fiber lasers 2 Graphite 2 High power applications 2 High power battery 2 High thermal conductivity 2 Lithium-ion batteries 2 Lithium-ion capacitors 2 Maximum temperature 2 Natural convection 2 Performance 2 Phase change materials 2 Pumping (laser) 2 Temperature control 2 Temperature reduction 2 Thermal 2 Thermal Performance 2 Thermal conductivity 2 Thermal management 2 Thermal management (electronics) 2 graphite 2 high power applications 2 high thermal conductivity 2 phase-change materials 2 thermal management 2 1064 nm fiber lasers 1 A.Fibres 1