Recent advancements in layered double hydroxides as an electrode material for high-performance asymmetric supercapacitors
摘要
In the current times, supercapacitors (SCs) are prime subjects of attention for researchers. Increasing developments exasperate the need for efficient energy storage mechanisms that undergo minimum losses. Energy storage device-based research paves the way for exploring research prospects in SCs. The basic requirement for efficient SCs is that the electrodes should possess high capacitive values with excellent performance. After exploring various choices for electrode materials like carbon-based electrochemical nanomaterials, conducting polymers (CPs), transition metal oxides (TMOs), metal-organic framework (MOFs), and MXenes, layered double hydroxides (LDHs) are of interest to researchers owing to their environmental benignity, morphology, cost, structure, and composition. LDHs can be classified as two-dimensional (2D) materials with ultrahigh-specific capacitance and superior ion insertion rate. The efforts of researchers portray an accumulation of various achievements. However, several drawbacks have followed too, such as poor internal stability, unfulfilled conductivity, limited range of capacitance, and structural collapse owing to severe agglomeration. The prime focus of the recent research is the fabrication of LDHs-based electrode materials with improved performance via modifications in composition, structure, and properties of the materials. The work here summarizes current progress carried out in LDHs as an electrode material with practical improvements in the electrode materials and future scope.