Owing to the high power density and ultralong cycle life, supercapacitors represent an alternative to electrochemical batteries in energy storage applications. However, the relatively low energy density is the main challenge for supercapacitors in the current drive to push the entire technology forward to meet the benchmark requirements for commercialization. To effectively solve this issue, it is crucial to develop electrode materials with excellent electrochemical performance since the electrode used is closely related to the specific capacitance and energy density of supercapacitors. With the unique structure, compositional flexibility, and inherent oxygen vacancy, perovskite oxides have attracted wide attention as promising electrode materials for supercapacitors. In this review, we summarize the recent advances in perovskite oxides as electrode materials for supercapacitors. Firstly, the structures and compositions of perovskite oxides are critically reviewed. Following this, the progress in various perovskite oxides, including single perovskite and derivative perovskite oxides, is depicted, focusing on their electrochemical performance. Furthermore, several optimization strategies (i.e., modulating the stoichiometry of the anion or cation, A-site doping, B-site doping, and constructing composites) to improve their electrochemical performance are also discussed. Finally, the significant challenges facing the advancement of perovskite oxide electrodes for supercapacitor applications and future outlook are proposed.

This review summarizes the recent progress of A-site perovskite oxides as an emerging functional material for electrocatalysis and photocatalysis applications.

A hierarchical CuO@NiCo LDH core–shell nanoarray on copper foil (CuO@NiCo LDH/CF) acts as an efficient and durable oxygen-evolving electrocatalyst, capable of driving 20 mA cm ⁻² at an overpotential of only 256 mV in 1.0 M KOH.

Conductive Ti ₃ C ₂ T _x (T = F, OH) MXene nanosheets act as efficient 2D catalysts for ambient electrohydrogenation of N ₂ to NH ₃ .

In this review, we summarize recent advances in the design and development of electrocatalysts for the N₂ reduction reaction. We also discuss the strategies to boost catalytic performances, the methods for reliable NRR experiments, and perspectives for further research directions.

Conductive metal–organic frameworks (MOFs) have been studied extensively in applications like water electrolysis, gas storage, and supercapacitors due to their high conductivity and large pore volume. In this communication, we report the first use of a conductive Ni-MOF as a non-noble-metal catalyst for efficient electro-oxidation of glucose in alkaline electrolyte. As an electrochemical sensor for glucose detection, this Ni-MOF shows a fast response time of less than 3 s, a low detection limit of 0.66 μM (S/N = 3), and a high sensitivity of 21 744 μA mM⁻¹ cm⁻². This glucose sensor also displays excellent selectivity, stability and reproducibility, and its application for the detection of glucose in real samples is also demonstrated successfully.