Greater specific energy densities in lithium-ion batteries can be achieved by using three-dimensional (3D) porous current collectors, which allow for greater areal mass loadings of the electroactive material. In this paper, we present the use of embroidered current collectors for the preparation of thick, pouch-type Li-ion batteries. Experiments were performed on LiFePO₄ (LFP) water-based slurries using styrene-butadiene rubber (SBR) as binder and sodium carboxymethyl cellulose (CMC) as thickener, and formulations of different rheological characteristics were investigated. The electrochemical performance (cyclic voltammetry, rate capability) and morphological characteristics of the LFP half-pouch cells (X-ray micro computed tomography and scanning electron microscopy) were compared between the formulations. An optimum electrode formulation was identified, and a mechanism is proposed to explain differences between the formulations. With the optimum electrode formulation, 350 µm casted electrodes with high mechanical stability were achieved. Electrodes exhibited 4–6 times greater areal mass loadings (4–6 mAh cm⁻²) and 50% greater electroactive material weight than with foils. In tests of half- and full-pouch embroidered cells, a 50% capacity utilization at 1C-rate and 11% at 2C-rate were observed, with a full recovery at C/5-rate. The cycling stability was also maintained over 55 cycles.

锂离子电池中更高的比能量密度可以通过使用三维（3D）多孔集电器来实现，这可以使电活性材料的单位面积质量负载更大。在本文中，我们介绍了使用绣花集电器制备厚的袋型锂离子电池。在LiFePO ₄上进行了实验以丁苯橡胶（SBR）为粘合剂，羧甲基纤维素钠（CMC）为增稠剂的（LFP）水基浆料，研究了不同流变特性的配方。在配方之间比较了LFP半袋电池的电化学性能（循环伏安法，速率能力）和形态特征（X射线计算机断层扫描和扫描电子显微镜）。确定了最佳的电极配方，并提出了一种机制来解释配方之间的差异。通过最佳的电极配方，可获得具有高机械稳定性的350 µm铸造电极。电极的面质量负载大4-6倍（4-6 mAh cm ^-2），并且电活性材料的重量比箔纸大50％。在半袋式和全袋式绣花细胞的测试中，观察到1C速率下的容量利用率为50％，2C速率下的容量利用率为11％，而C / 5速率下的容量利用率则完全恢复。循环稳定性也保持超过55个循环。