Improving synergism in Ni-prussian blue analog/CNT composite via coordination engineering for highly stable K+-ion capacitor

The robust NiHCF/carboxyl-CNT was fabricated by a facile ultrasonication for long-life K + -ion capacitors. DFT confirms the synergism between redox-active NiHCF and conductive CNT, offering excellent electrode and device stability in alkaline media.