Carbonized Polymer Dots for Controlling Construction of MoS₂ Flower‐Like Nanospheres to Achieve High‐Performance Li/Na Storage Devices

Abstract

Despite being one of the most promising materials in anode materials, molybdenum sulfide (MoS2) encounters certain obstacles, such as inadequate cycle stability, low conductivity, and unsatisfactory charge‐discharge (CD) rate performance. In this study, a novel approach is employed to address the drawbacks of MoS2. Carbon polymer dots (CPDs) are incorporated to prepare three‐dimensional (3D) nanoflower‐like spheres of MoS2@CPDs through the self‐assembly of MoS2 2D nanosheets, followed by annealing at 700 °C. The CPDs play a main role in the creation of the nanoflower‐like spheres and also mitigate the MoS2 nanosheet limitations. The nanoflower‐like spheres minimize volume changes during cycling and improve the rate performance, leading to exceptional rate performance and cycling stability in both Lithium‐ion and Sodium‐ion batteries (LIBs and SIBs). The optimized MoS2@CPDs‐2 electrode achieves a superb capacity of 583.4 mA h g−1 at high current density (5 A g−1) after 1000 cycles in LIBs, and the capacity remaining of 302.8 mA h g−1 after 500 cycles at 5 A g−1 in SIBs. Additionally, the full cell of LIBs/SIBs exhibits high capacity and good cycling stability, demonstrating its potential for practical application in fast‐charging and high‐energy storage.

MoS2-Based Nanocomposites for Microwave Absorption: A Review

“…48 Compared with 2H-MoS 2 , 1T-MoS 2 would show a larger layer spacing and higher conductivity, which could effectively improve the polarization intensity of the sample, thereby enhancing the loss of electromagnetic waves. 50 Although MoS 2 has strong multiple scattering and reflection on electromagnetic waves, the attenuation and conductivity of electromagnetic waves need to be further improved, and the 1T-MoS 2 metastable phase is difficult to prepare, which hinders the further improvement of MoS 2 microwave absorption performance. 51 In addition, MoS 2 will inevitably introduce active sites, such as structural defects/interfaces, during the preparation process.…”

“…Among them, the 1T phase is thermodynamically metastable and exhibits metallic behavior and the 2H phase is thermodynamically stable and exhibits semiconductor characteristics, and the 1T phase and the 2H phase could be converted into each other under certain conditions . Compared with 2H-MoS 2 , 1T-MoS 2 would show a larger layer spacing and higher conductivity, which could effectively improve the polarization intensity of the sample, thereby enhancing the loss of electromagnetic waves . Although MoS 2 has strong multiple scattering and reflection on electromagnetic waves, the attenuation and conductivity of electromagnetic waves need to be further improved, and the 1T-MoS 2 metastable phase is difficult to prepare, which hinders the further improvement of MoS 2 microwave absorption performance …”

“…In recent years, as a typical representative of two-dimensional transition metal sulfides (TMDs), MoS 2 has become a research hotspot in the field of emerging materials due to its unique physical and chemical properties, such as electrochemistry, sensors, medical treatment, photocatalysts, ion storage, and so on . At the same time, MoS 2 has good application prospects in energy storage and microwave absorption materials and devices. − …”

TiO2-Coated MoO3 Nanorods for Lithium/Sodium-Ion Storage

“…The unique properties of transition-metal oxides (TMOs) have led to their consideration as prospective anode materials in LIBs/SIBs. − Among the TMOs, molybdenum-based materials have diverse structural compositions and exceptional electrochemical properties, making them versatile for various applications. , In particular, molybdenum trioxide (MoO 3 ) has attracted attention as a promising candidate for addressing the issues associated with conventional anode materials in LIBs/SIBs. , The layered arrangement of MoO 3 , comprised of MoO 6 octahedra linked by shared oxygen atoms, endows it with notable theoretical capacity, impressive cycle stability, and affordability. MoO 3 has been crafted into various nanoscale shapes, including nanowires, nanobelts, , nanorods, hollow nanospheres, nanosheets, and thin films, utilizing diverse techniques like thermal evaporation, hydrothermal synthesis, and sol–gel synthesis.…”

“…9−13 Among the TMOs, molybdenum-based materials have diverse structural compositions and exceptional electrochemical properties, making them versatile for various applications. 14,15 In particular, molybdenum trioxide (MoO 3 ) has attracted attention as a promising candidate for addressing the issues associated with conventional anode materials in LIBs/SIBs. 16,17 The layered arrangement of MoO 3 , comprised of MoO 6 octahedra linked by shared oxygen atoms, endows it with notable theoretical capacity, impressive cycle stability, and affordability.…”