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首页> 外文期刊>International Journal of Electrochemical Science >Copper/Iron Composite Anode prepared by in situ co- precipitation with Excellent High-rate and Low-temperature Performance for Rechargeable Nickel-Iron Battery
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Copper/Iron Composite Anode prepared by in situ co- precipitation with Excellent High-rate and Low-temperature Performance for Rechargeable Nickel-Iron Battery

机译：通过原位共沉淀制备具有优异的高倍率和低温性能的可充电镍铁电池铜/铁复合阳极

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摘要

Copper/iron composite anode materials were synthesized by one-step co-precipitation methodfollowed by calcination at high temperature in this paper, which had shown excellent high-ratedischarge capacity and low temperature capability. Even the discharge-rate is as high as 10 C (1 C=200mA g-1), or the temperature is as low as 253 K, the batteries still exhibited good discharge capacity(130 mA h g-1 and 115 mA h g-1, respectively). XRD and SEM results revealed that under the reductiontreatment of acetylene carbon black at high temperature, copper atoms were preferentially reduced,removed from the spinel lattice and deposited on the surface, leading to the formation of porousstructure with high specific surface. EIS and polarization tests proved that the copper/iron compositeanode materials not only delayed the passivation but also raised the hydrogen evolution overpotential,both improved the dynamics of the iron electrode.
机译：本文采用一步共沉淀法合成铜/铁复合负极材料，然后高温煅烧，具有优异的高额定放电容量和低温性能。即使放电率高达10 C（1 C = 200mA g-1），或者温度低至253 K，电池仍具有良好的放电容量（130 mA h g-1和115 mA h g -1）。 XRD和SEM结果表明，在高温下乙炔炭黑的还原处理下，铜原子被优先还原，从尖晶石晶格中去除并沉积在表面，导致形成具有高比表面积的多孔结构。 EIS和极化试验证明，铜/铁复合阳极材料不仅延缓了钝化，而且提高了析氢的超电势，提高了铁电极的动力学性能。

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