云南昆明退役三元锂电材料失效特征及快速分选中退役电池进行电化学数据集（2020）

数据资料包括36#-103#锂电池在0%SOC和100%SOC状态下的交流阻抗图谱。结果说明实验表明在 100%SOC 和 0%SOC 状态下，49#、56#、64#、93#低频区凹陷半圆的半径和高度与其他几组电池的半径相比均有增加，这表明这 4块退役锂离子电池的电荷转移能力差，界面电阻较大。80#锂电池在低频区域的欧姆电阻最小。由此可推测欧姆电阻的增加可能与阳极上界面层生长和电极活性材料劣化有关，这也是锂离子电池性能和容量快速下降的主要原因

The dataset includes AC impedance spectra of lithium-ion batteries numbered 36# to 103# at 0% SOC and 100% SOC states. Experimental results demonstrate that at both 100% SOC and 0% SOC states, the radius and height of the depressed semicircle in the low-frequency region of batteries 49#, 56#, 64#, and 93# are all increased compared to those of other battery groups, indicating that these four retired lithium-ion batteries have poor charge transfer capability and larger interfacial resistance. The lithium-ion battery numbered 80# exhibits the smallest ohmic resistance in the low-frequency region. It can thus be inferred that the increase in ohmic resistance may be related to the growth of the interfacial layer on the anode and the degradation of electrode active materials, which is also the main cause of the rapid decline in the performance and capacity of lithium-ion batteries.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于云南昆明退役三元锂电材料的失效特征与快速分选，提供了2020年36#-103#锂电池在0%和100%SOC状态下的交流阻抗图谱。分析显示部分电池电荷转移能力较差、界面电阻较大，而欧姆电阻的变化可能与阳极界面层生长和电极材料劣化相关，这揭示了锂离子电池性能下降的关键因素。