Multifunctional Cathode for Structural Batteries Incorporating a Redox-Active Polymer Matrix Reinforced with Carbon Fiber
발표자
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초록
내용
Despite the adoption of electric vehicles (EVs), the low energy density of lithium-ion batteries (LIBs) limits their driving range. Structural energy storage aims to address this by combining energy storage with structural support, reducing vehicle mass by integrating battery function into the structure. Laminated composites with carbon fibers (CFs) as current collectors have been used, but traditional electrode materials on CFs delaminate under stress. We propose a novel composite for battery cathodes using CFs integrated with a redox-active polymer (RAP) matrix. This carbon fiber-reinforced redox-active polymer (CFRRAP) composite electrode withstands mechanical loads without delaminating, and the RAP matrix efficiently stores and delivers Li-ions. The optimized PI-based CFRRAP cathode has an elastic modulus of 18 GPa, tensile strength of 213 MPa, specific capacity of 141 mAh/g, and an average discharge voltage of 2.2 V. Its properties surpass most reported structural cathodes.