NOVELTY - Preparing particles comprises (i) dispersing lithium oxide particles (I), (II) and (III), preferably lithium titanium oxide in an anhydrous composition, (ii) preparing anhydrous composition comprising alkoxide compound (IV), and (iii) mixing the anhydrous dispersion and the anhydrous composition to obtain particles whose first zone is coated with a layer of oxide (V) and second zone is not coated with the layer of oxide. The first zone reacts with electrolyte based on lithium hexafluorophosphate.    USE - The method is useful for preparing particles, which are useful as active materials within a composite electrode for lithium batteries comprising a first zone and a second zone (claimed), where the batteries include a nickel-metal hydride battery and a nickel-cadmium battery and are useful as an energy source in portable electronic devices such as mobile phones and laptops and in motor vehicles such as electric cars.    ADVANTAGE - The active materials improve the electrochemical performance, lifespan, cycling characteristics, stability and coulombic efficiency of the batteries.    DETAILED DESCRIPTION - Preparing particles comprises (i) dispersing lithium oxide particles of formula (LiMaPO4) (I), (LiMbO2) (II) and (LiMc2O4) (III), preferably lithium titanium oxide (Li4Ti5O12) in an anhydrous composition, (ii) preparing anhydrous composition comprising alkoxide compound of formula (R1t(R2X)uA(OR3)z-(t+u)) (IV), and (iii) mixing the anhydrous dispersion and the anhydrous composition to obtain particles whose first zone is coated with a layer of oxide of formula (R1r(R2X)xAvO3-w) (V) and second zone is not coated with the layer of oxide. The first zone reacts with electrolyte based on lithium hexafluorophosphate.    Ma = Fe, Co, Mn or Al;    Mb = Ni, Co, Mn or Al;    Mc = Ni or Mn;    t = 0-2;    u = 0-2;    z = 2-4;    X = H, preferably Fl or Cl;    A = transition metal and elements from IIIA and IVA groups, preferably Ti, Fe, Al, Zn, In, Cu, Si, Sn, Y, B, Cr, Mn, V or Zr;    R1 = 1-8C linear or branched alkyl; and    R2 = single bond or 1-8C linear or branched alkyl;    R3 = 1-8C linear or branched alkyl; and    r, w, x = 0-2, preferably 1-2.