Abstract
The poor cycling stability is a tricky problem in the silicon-based lithium-ion batteries. Herein, we fabricate a three-dimension polyaniline/poly (acrylic acid)/phytic acid compound binder for the silicon anodes. In this binder, polyaniline-doped and gelated by phytic acid functions as a continuous electrically conductive network structure for the silicon anodes. Meanwhile, a high density of carboxyl groups provided by poly (acrylic acid) enhance the stability of the silicon electrodes by supplying strong binding ability with current collectors and silicon particles. Using this multifunctional binder in silicon anode, we succeed in manufacturing very long cycle life of larger than 1000 cycles at a current density of 4.2 A g−1.
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