锂离子电池负极浆料稳定性测试

Stability test of negative slurry of Li-ion battery

利用流变仪在相同频率下测试相同设备和配方以及不同工艺制备的石墨体系负极浆料的线性黏弹区(LVR)长度和内聚能(CE),以评价浆料的稳定性。该方法耗时短(不超过15 min)、范围广,结果准确,实验的重现性和实用性好。对相同负极浆料平行测试3次,LVR长度和CE的标准偏差分别为1.108%和0.009%,可取代传统的负极浆料稳定性的测试方法。

The rheometer was used to evaluate the slurry stability by measuring the length of linear viscoelastic range(LVR) and the cohesive energy(CE) in the same frequency of negative slurry with graphite system produced by the same equipment,the same formula and different processes.This method had the advantages of short time(less than 15 min),wide testing range,accurate testing,good reproducibility and practicability.The standard deviations of the LVR and CE for the three parallel test results of the same negative slurry were 1.108% and 0.009%.The method could replace the traditional method to test the stability of negative slurry.