Synthesis of Co-Ni oxide microflowers as a superior anode for hybrid supercapacitors with ultralong cycle life

As a typical battery-type material, Co-Ni oxide (CoNiO) which was synthesized by a simple co-precipitation method and capacitor-type activated polyaniline-derived carbon (APDC) were used to assemble LIHCs as the anode and cathode electrode materials, respectively. The assembled LIHC exhibits excellent cycle stability with the capacitance retention of ∼78.2% after 15,000 cycles at a current density of 0.5 A g−1.