Electrochemical properties of LiNi1-(x+y)AlxZnyO2 cathode materials synthesized by emulsion method
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LiNi1-(x+y)AlxZnyO2 composition (x=0.0-0.10, y=0.0-0.005) powders, in which the Ni3+ has been partially substituted with Al3+ and Zn2+, were synthesized by an emulsion method and their electrochemical properties were investigated. The emulsionderived powder had a porous spherical shape agglomerated from fine particles, whereas the calcined powder had an agglomerated shape with nanosized particles, under 50 nm. The intercalation of Li+ was higher in the LiNi1-(x+y)AlxZnyO2 than in the pure LiNiO2. The first discharge capacity and fading rate for 20 cycles were 161 mAh/g and 8.5% in LiNiO2, 168 mAh/ g and 7.1% in LiNi0.99Al0.01O2, 163 mAh/g and 5.5% in LiNi0.995Zn0.005O2 and 164 mAh/g and 7.4% in LiNi0.992Al0.006Zn0.002O2.
Abstract
LiNi1-(x+y)AlxZnyO2 composition (x=0.0-0.10, y=0.0-0.005) powders, in which the Ni3+ has been partially substituted with Al3+ and Zn2+, were synthesized by an emulsion method and their electrochemical properties were investigated. The emulsionderived powder had a porous spherical shape agglomerated from fine particles, whereas the calcined powder had an agglomerated shape with nanosized particles, under 50 nm. The intercalation of Li+ was higher in the LiNi1-(x+y)AlxZnyO2 than in the pure LiNiO2. The first discharge capacity and fading rate for 20 cycles were 161 mAh/g and 8.5% in LiNiO2, 168 mAh/ g and 7.1% in LiNi0.99Al0.01O2, 163 mAh/g and 5.5% in LiNi0.995Zn0.005O2 and 164 mAh/g and 7.4% in LiNi0.992Al0.006Zn0.002O2.