Organics‐MXene Composites as Electrode Materials for Energy Storage

Abstract

Batteries & Supercaps www.batteries-supercaps.org Review doi.org/10.1002/batt.202200402 development of organics/MXene-based composites and summarizes the various strategies for assembling or fabricating organics/MXene-based hybrid composites. Applications of these organics/MXene-based electrode materials in supercapacitors and batteries are also discussed in brief along with analysis of their excellent electrochemical performances and the charge storage mechanisms. Finally, some remaining challenging issues and future opportunities of organics/MXene composites as electrode materials for the high-power and low-cost rechargeable batteries or supercapacitors are also discussed.

Ultra‐stable cycling of organic carboxylate molecule hydrogen bonded with inorganic Ti3C2Tx MXene with improved redox kinetics for sodium‐ion batteries

“…As seen, obvious irreversible reactions can be detected for both TBC and TBC/Ti 3 C 2 T x from the right shifting of cathodic peaks between the initial scan and subsequent scans, while the anodic peaks remain well. 48,59 For both the pure TBC and TBC/Ti 3 C 2 T x , the redox pair at around 0.5 V can be well indexed to the typical sodiation/ desodiation reactions of carbonyl groups in TBC, and another redox pair at the low voltage near 0 V can be assigned to the intercalation/deintercalation of Na + into/ from the layered structure of Ti 3 C 2 T x MXene. 27 After the first cycle, the well-maintained CV curves of TBC/ Ti 3 C 2 T x indicate its good electrochemical reversibility.…”

In Situ Growth Engineering on 2D MXenes for Next‐Generation Rechargeable Batteries

“…In situ polymerization method can easily achieve the growth of polymers on 2D MXene, and it is usually proceeded by mixing compositions such as monomer, catalyst, and initiator in a solvent. [ 178 ] MXene is suitable as a substrate for in situ polymerization of polymers due to its high specific surface area and abundant surface functional groups. In situ polymerization could tightly couple polymers and MXene.…”

Thermally Conductive MXene

“…MXenes belong to the category of transition metal nitrides, carbides, and carbonitrides (two-dimensional (2D)), and they demonstrated superb thermal conductivity, mechanical strength, and electrical properties, coupled with remarkable chemical stability . The nomenclature “MXene” comes from the chemical formula, M n +1 X n T x , wherein M represents a transition metal, X represents nitrogen, and/or carbon T denotes surface termination species such as oxygen, fluorine, and hydroxyl groups; and n and x denote the number of layers and termination groups, respectively (Figure a) . The unique structure of MXenes emerges from their synthesis process, which entails specific etching of the “A” layer from a MAX phase precursor material.…”

“…15 The nomenclature "MXene" comes from the chemical formula, M n+1 X n T x , wherein M represents a transition metal, X represents nitrogen, and/or carbon T denotes surface termination species such as oxygen, fluorine, and hydroxyl groups; and n and x denote the number of layers and termination groups, respectively (Figure 1a). 16 The unique structure of MXenes emerges from their synthesis process, which entails specific etching of the "A" layer from a MAX phase precursor material. The MAX phase, denoted as M n+1 AX n , is a ternary compound comprising transition metals (M), an early transition metal element (A), and nitrogen, carbon (X), or both.…”