A new method is provided for preparing self-supporting flexible lithium-ion battery electrodes of a textile structure by using extrusion 3D printing technology, using a high concentration of polyvinylidene fluoride as a viscosity modifier, carbon nanotube as a conductive agent, lithium iron phosphate or lithium titanate as an electrode active material. A printable ink prepared in the paper, with an apparent viscosity of approximately 10⁵ Pa s, exhibits significant shear thinning behavior, and the storage modulus platform value reaches a high value of 10⁵ Pa; its excellent rheological properties are beneficial for the printing and solidification process. Electrochemical test results show that the two printing electrodes have a stable and well-matched charge–discharge specific capacity, so the assembled soft-packed lithium-ion battery displays a discharge specific capacity of up to 108 mAh·g⁻¹, and after bending the battery, the discharge specific capacity under the same current density (50 mA·g⁻¹) is about 111 mAh·g⁻¹. The outstanding electrochemical properties open up possibilities for flexible and wearable electronics applications.

提供了一种新方法，该方法通过使用高浓度的聚偏二氟乙烯作为粘度调节剂，碳纳米管作为导电剂，磷酸铁锂或高浓度的聚偏二氟乙烯，通过挤压3D打印技术制备纺织品结构的自支撑柔性锂离子电池电极。钛酸锂作为电极活性材料。用纸制得的可印刷油墨的表观粘度约为10 ⁵  Pa s，表现出显着的剪切稀化行为，并且储能模量平台值达到10 ⁵的高值 帕; 其优异的流变性能有利于印刷和固化过程。电化学测试结果表明，两个印刷电极具有稳定且匹配的充放电比容量，因此组装好的软包装锂离子电池在弯曲后显示的放电比容量高达108 mAh·g ^-1。在相同电流密度（50mA·g ^-1）下的放电比容量约为111mAh·g ^-1。出色的电化学性能为柔性和可穿戴电子应用打开了可能性。