Acrylate-modified binder for improving the fast-charging ability of a power battery.

In this paper, an acrylate-modified binder is introduced to the negative electrode of a power battery to improve its fast-charging performance. The Li+ ionic conductivity of the acrylated-modified GD1346 copolymer was twice that of commercial SN307 copolymer at room temperature. GD1346 greatly reduced the Ohm resistance and charge transfer resistance of the negative electrode from those of SN307 and enhanced the surface potential to more than 15 mV. This high performance is attributed to strong electrolyte adsorption ability and the ester groups, which favour Li+ diffusion. Consequently, the fast-charging time of the power battery is reduced from 107 to 82 min as the state of charge increases from 0 to 100%. The practicality of acrylate-modified GD1346 binder in the manufacture of large-scale batteries is also confirmed. The techniques developed in this work are expected to promote the development of efficient binders for next-generation high-energy lithium ion batteries. [ABSTRACT FROM AUTHOR]