包埋镍酸锂的热稳定性和耐过充性

Thermal stability and overcharge performance of the coated LiNiO_2

锂离子电池在受热、过充条件下容易引起安全性问题,使其应用于电动汽车、混合动力汽车的动力电源受到限制。用锂钴氧包埋镍酸锂作为正极材料,组装AA型锂离子电池,对其热稳定性、过充性和钴酸锂AA电池进行了对比研究。实验结果表明:包埋镍酸锂作为锂离子电池正极材料,其热稳定性能和钴酸锂基本相当,过充性能远远优于钴酸锂。包埋镍酸锂正极材料提高了锂离子电池的安全性。

The use of the Li-ion batteries in the field of large power sources,such as EV,HEV had been limited due to safety concerns associated with the heating and overcharging. Thermal stability and the overcharge performance of the AA size batteries assembled using LiCoO_2-coated LiNiO_2 as cathode materials in comparing with the LiCoO_2-based AA-type batteries were studied. The results showed that the thermal stability of coated LiNiO_2 was basically similar to that of LiCoO_2,meanwhile,coated LiNiO_2 presented better performance than LiCoO_2 in overcharging. The safety of Li-ion batteries using coated LiNiO_2 as positive electrode materials was improved.