Improvement of the characteristics of poly(acrylonitrile-butylacrylate) water-dispersed binder for lithium-ion batteries by the addition of acrylic acid and polystyrene seed

In this study, we modified an attractive water-dispersed poly(acrylonitrile-butylacrylate) binder used for lithium-ion batteries by the addition of highly acidic acrylic acid (AA). The synthesized poly(acrylicacid-acrylonitrile-butylacrylate)-polystyrene polymer showed an improved performance as a binder with smaller particle size, stiffer polymer matrix, higher adhesion strength, and lowercontact angle characteristics. Consequently, the modified water-dispersed binder by the addition of AA increased the cyclic capacity and retention of physically mixed silicon/graphite anodes, when compared to the unmodified poly(acrylonitrile butylacrylate) binder. (C) 2014 Elsevier B.V. All rights reserved.