The intercalation of n -butylamine into layer-structured α -ZrP benefits the formation of a dense layer, reduces the transfer barrier of Zn ²⁺ and increases the local concentration of Zn ²⁺ , leading to enhanced electrochemical performances for Zn anodes.

In recent years, the research on supercapacitors has ushered in an explosive growth, which mainly focuses on seeking nano-/micro-materials with high energy and power densities. Herein, this review will be arranged from three aspects. We will summarize the controllable architectures of spinel NiCo₂O₄ fabricated by various approaches. Then, we introduce their performances as supercapacitors due to their excellent electrochemical performance, including superior electronic conductivity and electrochemical activity, together with the low cost and environmental friendliness. Finally, the review will be concluded with the perspectives on the future development of spinel NiCo₂O₄ utilized as the supercapacitor electrodes.