The rheological property of cathode slurry is commonly influenced by coating speed and mixing temperature, thereby leading to its storage stability and coating uniformity. In this study, the effect of the temperature of slurry on the rheological behaviors is investigated under various shear rates and temperatures based on steady and dynamic tests as well as theoretical models. In the flow experiments, the thixotropic behavior of the slurry is observed at all temperatures tested, and it is reduced with the increase in temperature. The experimental data is captured well by rheological models, and the model parameters are evaluated under the combined effects of shearing and temperature, resulting in two generalized state equations for the description of the flow properties of the slurry. In addition, microstructural rearrangement and polymeric entanglement at high temperatures cause viscosity and modulus to change, giving rise to complex rheological behavior in creep and oscillatory shear. Compared with slurry at 25 and 40 °C, both storage and loss moduli are dependent on oscillatory strain in the range of 0.1–1000% at 65 °C. The difference in characteristic strain corresponding to yielding and strain stiffening behavior is only observed at high temperatures, whereas relaxation times were independent of temperature in the oscillatory shear test. Understanding the effect of the temperature of slurry on rheological behaviors will be useful for improving the manufacturing efficiency of electrodes.

正极浆料的流变性能通常受涂布速度和混合温度的影响，从而影响其储存稳定性和涂布均匀性。本研究基于稳态和动态试验以及理论模型，研究了不同剪切速率和温度下浆料温度对流变行为的影响。在流动实验中，在所有测试温度下都观察到浆料的触变行为，并且随着温度的升高而降低。流变模型很好地捕捉了实验数据，并在剪切和温度的综合作用下评估模型参数，得到两个描述浆料流动特性的广义状态方程。此外，高温下的微观结构重排和聚合物缠结会导致粘度和模量发生变化，从而在蠕变和振荡剪切中产生复杂的流变行为。与 25 和 40 °C 下的浆料相比，65 °C 时储能模量和损耗模量均取决于 0.1-1000% 范围内的振荡应变。与屈服和应变硬化行为相对应的特征应变差异仅在高温下观察到，而松弛时间与振荡剪切测试中的温度无关。了解浆料温度对流变行为的影响将有助于提高电极的制造效率。与 25 和 40 °C 下的浆料相比，65 °C 时储能模量和损耗模量均取决于 0.1-1000% 范围内的振荡应变。与屈服和应变硬化行为相对应的特征应变差异仅在高温下观察到，而松弛时间与振荡剪切测试中的温度无关。了解浆料温度对流变行为的影响将有助于提高电极的制造效率。与 25 和 40 °C 下的浆料相比，65 °C 时储能模量和损耗模量均取决于 0.1-1000% 范围内的振荡应变。与屈服和应变硬化行为相对应的特征应变差异仅在高温下观察到，而松弛时间与振荡剪切测试中的温度无关。了解浆料温度对流变行为的影响将有助于提高电极的制造效率。而在振荡剪切测试中，松弛时间与温度无关。了解浆料温度对流变行为的影响将有助于提高电极的制造效率。而在振荡剪切测试中，松弛时间与温度无关。了解浆料温度对流变行为的影响将有助于提高电极的制造效率。