LAUSR

Abstract Aqueous binders have recently received great attention for lithium ion batteries due to its good stability and safety. Herein, poly (acrylic acid)/poly (vinyl alcohol) (PAA/PVA) blends have been used as a binder for lithium iron phosphate (LiFePO4/C) cathodes. This blending system not only can form a stable network by hydrogen-bonding interactions leading to an increase in the amount of binder covering the surface of active materials, but also can significantly enhance the adhesion strength of electrodes. Additionally, The conductive agent and active materials are uniformly distributed due to the interaction between PAA/PVA blending binder and electrode materials, which it is beneficial to Li+ conduction in the electrode. These unique properties result in lower polarization and interfacial resistance of the electrode, thus considerably overcoming the limitation of LiFePO4/C electrodes for electrochemical performance. It is believed that this blending binder has a great potential to be used for commercial lithium ion batteries.