Mixtures of cellulose acetate (M.W. similar to 3 x 10(4) g/mol) dissolved in 75% v/v acetic acid in water (17% w/w) and ground anatase titania particles with diameters of 197 +/- 75 nm (0%, 5% and 10% w/w) were electrospun at 17 kV with a fiber collection distance and a feed rate of 10 cm and 0.6 mL/h. Then, the fiber was treated with 0.5M potassium hydroxide in ethanol. Rough regenerated cellulose (RC)-titania separators with diameters of similar to 310 nm and uniformly dispersed titania particles showed similar to 78% porosities. They decomposed at 300 degrees C, higher than the decomposition temperature of polyethylene separators (220 degrees C). Added titania particles increased the electrolyte wettability and lithium transference number (from 0.22 to 0.62). RC - 10% titania separator retained the capacity with 79 mA h/g after 30 cycles and had excellent discharge capacity. These fascinating properties make RC-titania separator promising for lithium ion battery.