Coherency between thermal and electrical transport of partly reduced graphene paper

By continuously varying the structure of graphene oxide paper (PRGP) using Joule heating annealing, we are able to tune its electrical conductivity (?) and thermal diffusivity (?) in a very wide range: more than three orders magnitude for ? (186–503009 S/m) 10-fold ? (8.31 × 10?7 m2/s 9.31 10?6 m2/s). Excellent coherency-linear relationship between is discovered although they sustained by different carriers: electrons phonons. Such coherency exists over two sections: > 2 104 S/m, 103<? < S/m. A two-component parallel proposed interpret observed discovery. The slope ??? relation reflects ratio difference components ordered structure. intercept disordered It found our PRGP agrees well with that amorphous carbon. Past work on carbon nanocoil, paper, film, fiber also reveals linear ?. However, there no uniform while close similar materials. parameters strongly depend structures material.