Application of multi-scale pore regulation for high thermal conductivity foam reinforcements in energy storage

•The multi-scale pore regulation was conducted to reduce the low-λ areas inside foam reinforcement.•Thermal conductivity of the composite was significantly enhanced to 19.6 times higher than the matrix.•Finite element simulation revealed the mechanism of the multi-scale pore regulation on the overall heat transfer process.•A trade-off between the heat conduction enhancement and energy storage performance can be achieved by multi-scale pore regulation.