钇对锂铝合金阳极性能的影响

Effects of yttrium on behaviour of lithium aluminium alloy anode

研究了稀土元素钇对锂铝合金阳极充放电性能及其表面结构的影响。在锂铝合金阳极中添加 0 .5%～1 .5%钇 ,电池的放电容量和放电电压分别提高了 1 0mAh和 50mV。添加钇的锂铝合金阳极经过 3次充放电后 ,电极表面结构完整均匀。多孔型锂铝合金阳极比平板型锂铝合金阳极的放电容量有明显提高 ,添加 0 .5%～ 1 .5%钇的多孔锂铝合金阳极具有理想的充放电性能。锂铝合金阳极的充放电过程受锂原子在电极中的扩散速度控制。

The effects of yttrium on the charge discharge behaviour and surface structure of lithium aluminium alloy anode were studied. The experimental results indicated that the discharge capacity and voltage are enhanced about 10 mAh and 50 mV respectively, and the surface structure is improved by adding 0.5%～1.5% yttrium in it; the porous lithium aluminium alloy anode is better than the flat one and the porous yttrium lithium aluminium has the ideal charge discharge properties. The charge discharge process of lithium aluminium alloy anode is controlled by the diffusion of lithium in it.