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Fabrication of flexible lithium-ion battery electrodes for wearable full battery with high electrochemical performance
Journal of Materials Science: Materials in Electronics ( IF 2.8 ) Pub Date : 2020-03-19 , DOI: 10.1007/s10854-020-03228-7
Shu-Juan Gao

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.



中文翻译:

具有高电化学性能的可穿戴式全电池柔性锂离子电池电极的制造

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。

更新日期:2020-04-21
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