Full Cell Lithium-Ion Battery Manufacture by Electrophoretic Deposition
Full Cell Lithium-Ion Battery Manufacture by Electrophoretic Deposition
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电泳沉积法制造全电池锂离子电池
DOI：
10.1002/batt.202200441
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发表时间：
2022
影响因子：
5.7
通讯作者：
Bree G
中科院分区：
文献类型：
--
作者：
Bree G
电泳沉积(EPD)是一种工业规模的成熟涂装工艺。它最初是为汽车行业设计的，现已扩展到其他应用，特别是用于表面保护的陶瓷涂层，并在电池行业找到了前景广阔的应用。虽然EPD电极的基础半电池研究很多，但它们在全电池水平上的实际性能在很大程度上是未知的。本研究采用典型的Li4Ti5O12/LiFePO4(LTO/LFP)化学方法，报道了一种全电池锂离子电池，其中正极和负极均由EPD制造。进行了符合行业可伸缩性的研究，包括a)用于大面积电极制造的胶体电解质的配方，b)提供高涂层厚度和质量负载的EPD参数的优化，c)与浆料浇铸电极的比较，d)大面积储袋电池原型的缩放研究，以及e)用于高功率应用的多孔集流器的制造简便性。研究发现，EPD电极的实用性能优于浆料浇注电极，包括更低的电阻、更大的可抽取量、更高的功率容量和稳定的循环稳定性。
Electrophoretic deposition (EPD) is a proven coating operation at an industrial scale. Initially designed for the automotive industry, it has expanded to other applications, notably ceramic coatings for surface protection, and has found promising application in the battery industry. Whilst fundamental half‐cell studies of EPD electrodes are numerous, their practical performance at full‐cell level is largely unknown. This study reports full‐cell lithium‐ion batteries in which anode and cathode are manufactured by EPD, using an exemplary Li4Ti5O12/LiFePO4(LTO/LFP) chemistry. Investigations compatible with industry scalability were carried out including a) formulation of colloidal electrolytes for large area electrode manufacture, b) optimisation of EPD parameters providing high coating thickness and mass loading, c) comparison with slurry cast electrodes, d) scaling investigations to prototype large area pouch cells, and e) ease of manufacture with porous current collectors for high power applications. It was found that the practical performance of EPD electrodes outperformed slurry casting in various categories including lower resistances, more extractable capacity, higher power capability and stable cycling robustness.