低温条件下磷酸铁锂-石墨体系锂离子电池阻抗研究

李萌, 王跃, 邱景义, 文越华, 朱振威, 孟闻捷

Study on impedance of lithium-ion batteries with lithium iron phosphate and graphite system under low temperature

Meng LI, Yue WANG, Jingyi QIU, Yuehua WEN, Zhenwei ZHU, Wenjie MENG

表2 不同温度下阻抗拟合结果

Table2 Impedance fitting results at different temperatures

温度/℃ 电极 Rs/Ω RSEI/Ω Rct/Ω 25 正极 1.464 36.77 19.24 负极 1.684 2.33 97.5 电池 2.421 38.35 128.1 10 正极 1.637 44.19 26.72 负极 1.837 8.251 136.8 电池 2.834 52.3 169.3 0 正极 1.777 51.88 29.05 负极 2.066 15.38 155 电池 3.204 69.2 180.1 -10 正极 2.16 64.1 37.86 负极 2.364 30.88 187.2 电池 3.816 99.75 219.2 -20 正极 5.706 95.86 57.15 负极 3.115 35 135.5 电池 8.11 146.7 192.7