Solution-liquid-solid growth of CuInTe2 nanowires as lithium-ion battery anodes

Add time:08/31/2019    Source:sciencedirect.com

For the first time, CuInTe2 nanowires in I–III–VI2 chalcopyrite ternary system were synthesized via the bismuth (Bi)-seeded solution-liquid-solid (SLS) growth under 350 °C. CuInTe2 nanowires were made by using the mixture of Cu(acac)2, InCl3 and Te powder as precursors, bismuth 2-ethylhexanoate [Bi[N(SiMe3)2]3] as growth seed solution and tri-n-octylphosphine (TOP) as solvents, respectively. As-made CuInTe2 nanowires are single crystals with a tetragonal chalcopyrite structure with diameters ranging from 10 to 200 nm. In addition, as an anode material in the lithium ion batteries, the capacity of CuInTe2 nanowires in charging/discharging rate of 0.1C capacity of 780 mAh/g after 200 cycles (1C = 572 mAh/g), showing the accomplished reversibility. Furthermore, the discharge capacity (385 mAh/g) at 5C rate is still higher than the theoretical capacity of graphite (372 mAh/g), showing the attractive performance in the fast charging/discharging rates.

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