Abstract
The layered double hydroxides (LDHs) with redox metal centers and tailorable layered structures have been regarded as the favorable electrode materials for supercapacitors. In this work, a two-in-one strategy has been designed to synthesis two-dimensional (2D) boron-doped NiCo-LDH with abundant wrinkles by reacting NiCo-zeolite imidazolate frameworks with KBH4 in only 30 min. The abundant wrinkles can afford rich active sites for redox reaction and the 2D structure can shorten the ion transport path. The theoretical calculation confirms that mixed NiCo composition and B doping can enhance the OH− adsorption and regulate the electronic properties. Because of the synergistic effect of Ni and B occurred in the B-NiCo-LDH, the resulting B doped NiCo-LDH/nickel foam electrode can achieve good performance of 1351 F g−1 at 1 A g−1 and maintains 802 F g−1 at 20 A g−1. This study may provide a facile and efficient protocol for construction of B doped LDH based supercapacitor electrodes.
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