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LiZr2-x Ti x (PO4)3 with x = 0, 0.5, and 1.0 were synthesized by a sol-gel method and electrochemically cycled as an anode for Li-ion batteries. LiZr2-x Ti x (PO4)3 with rhombohedral structure (space group, Rc) underwent irreversible amorphization during the first Li insertion, leading to a large loss of the discharge capacity. The resulting amorphous phase, however, well maintained their discharge capacity (60.4 mAh g[?]1, 74.6 mAh g[?]1, and 149.6 mAh g[?]1 for LiZr2(PO4)3, LiZr1.5Ti0.5(PO4)3, and LiZrTi(PO4)3, respectively, cycled 0.2 mA cm[?]2 between 0.1 and 3 V) during an extended electrochemical cycling. It was shown that the Ti addition substantially increased the discharge capacity of LiZr2(PO4)3, although the addition caused gradual capacity fading during cycling when added in excess.

A 360 nm thick thin film was electrochemically cycled with excellent capacity retention as an anode for lithium-ion batteries. The as-deposited film, which was amorphous, exhibited a large initial discharge capacity ( at ), which quickly deteriorated during cycling. The initial discharge capacity of the electrode progressively dropped when the film was annealed at ; however, the capacity retention was markedly improved by the annealing. The optimum annealing temperature was at which was maintained throughout 50 cycles. The structural analysis and magnetic properties suggest that the lithium ions induced the Co atoms to segregate during cycling, which led to the capacity degradation of the amorphous electrode. The thermal annealing of the film improved the cycling stability by segregating the Co and Mn atoms through crystallization before cycling.

LiZr2–xTix(PO4)3with x= 0, 0.5, and 1.0 were synthesized by a sol–gel method and electrochemically cycled as an anode for Li-ion batteries. LiZr2–xTix(PO4)3with rhombohedral structure (space group, R3¯c) underwent irreversible amorphization during the first Li insertion, leading to a large loss of the discharge capacity. The resulting amorphous phase, however, well maintained their discharge capacity (60.4 mAh g−1, 74.6 mAh g−1, and 149.6 mAh g−1for LiZr2(PO4)3, LiZr1.5Ti0.5(PO4)3, and LiZrTi(PO4)3, respectively, cycled 0.2 mA cm−2between 0.1 and 3 V) during an extended electrochemical cycling. It was shown that the Ti addition substantially increased the discharge capacity of LiZr2(PO4)3, although the addition caused gradual capacity fading during cycling when added in excess.