RETRACTED ARTICLE: Fabrication of flexible lithium-ion battery electrodes for wearable full battery with high electrochemical performance

Abstract

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.