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Zeolitic imidazolate framework-67(ZIF-67)was synthesized on the surface of cellulose nanofibers(CNFs)in methonal to address the problems of unhomogeneous pore size and pore distribution of pure CNF membrane.A combination of Energy Dispersive X-Ray Spectroscopy(EDS),X-ray photoelectron spec-troscopy(XPS)and X-ray powder diffraction(XRD)patterns were used to determine the successful syn-thesis of [email protected] size of the ZIF-67 particles and pore size of the ZIF-67@CNF membrane were 50-200 nm and 150-350 nm,respectively.The prepared ZIF-67@CNF membrane exhibited excellent thermal stability,lower thermal shrinkage and high surface wettability.The discharge capacity retention of the Li-ion batteries(LIBs)made with Z1F-67@CNF,glass fiber(GF),CNF and commercial polymer mem-branes after 100th cycle at 0.5C rate were 88.41％,86.22％,83.27％,and 81.03％,respectively.LIBs with ZIF-67@CNF membrane exhibited a better rate capability than these with other membranes.No damage of porous structure or peel-off of ZIF-67 was observed in the SEM images of ZIF-67@CNF membrane after 100th cycle.The improved cycling performance,rate capability,and good electrochemical stability implied that ZIF-67@CNFs membrane can be considered as a good alternative LIB separator.