▎ 摘　　要

NOVELTY - A flexible graphene heat guide membrane comprises a graphene microchip and a microporous filter membrane, where the graphene microchip is made of oxidized graphene or nitrogen-doped graphene oxide and the microporous filter membrane comprises an acetic acid fiber mixed microporous membrane, a polypropylene filter membrane, a nylon-66 filter membrane, a polyvinylidene fluoride filter membrane, a PTFE hydrophilic filter membrane, a PTFE hydrophobic filter membrane, a BT glass fiber filter membrane and a polyether sulfone filter membrane with aperture size of 8-18 mu m and diameter of 25-400 nm. USE - Flexible graphene heat guide membrane for a lithium battery. ADVANTAGE - The flexible graphene heat guide membrane is prepared with better cooling effect in a simple manner. DETAILED DESCRIPTION - A flexible graphene heat guide membrane comprises 2-10 wt.% graphene microchip and 90-98 wt.% microporous filter membrane, where the graphene microchip is made of oxidized graphene or nitrogen-doped graphene oxide having thickness of 5-80 nm and chip size of 1-5 mu m and the microporous filter membrane comprises an acetic acid fiber mixed microporous membrane, a polypropylene filter membrane, a nylon-66 filter membrane, a polyvinylidene fluoride filter membrane, a PTFE hydrophilic filter membrane, a PTFE hydrophobic filter membrane, a BT glass fiber filter membrane and a polyether sulfone filter membrane with aperture size of 8-18 mu m and diameter of 25-400 nm. An INDEPENDENT CLAIM is also included for a method for preparing a flexible graphene heat guide membrane.