Dual modification of Ti₃C₂T_x MXene hybridization and cut-off voltage adjustment for MoS₂ to achieve stable sodium storage performance

Abstract

Molybdenum disulfide (MoS2), the typical layered transition metal sulfides with large interlayer distance, narrow band gap structure, and high theoretical capacity for sodium storage, shows tremendous promise for sodium-ion batteries...

V3S4/PPy nanocomposites with superior high-rate capability as sodium-ion battery anodes

“…2e) exhibits two peaks at 161.2 and 162.7 eV, which correspond to the S 2p 3/2 and 2p 1/2 in V-S bonds, respectively. [63][64][65][66] The peaks at 164.1 and 168.4 eV are attributed to the S-C and S-O bonds. 67 Moreover, the N 1s spectrum (Fig.…”

Addressing Irreversibility and Structural Distortion in WS2 Inorganic Fullerene-Like Nanoparticles: Effects of Voltage Cutoff Experiments in Beyond Li+-Ion Storage Applications

“…Therefore, this study utilized upper and lower voltage cutoff techniques to suspend conversion reactions at various stages and observe the structural evolution via differential capacity with evolving cycling conditions. Restriction of voltage cutoff plays a crucial role in maintaining the electrode materials’ structural integrity, resulting in consistent and reliable capacity. , Although energy density and specific capacity decrease with the reduced voltage cutoff (a high upper cut-off), long-term cyclability can be achieved by limiting voltage cutoff for a wide range of applications. − Grid energy storage devices or portable electronics require numerous cycles over the operational lifetime; hence, ensuring batteries with high cyclability is crucial for sustainable performance. − Therefore, the kinetics and subtle differences in Na + - and K + -ion storage within WS 2 IFs were further explored by employing rigorous electrochemical analysis techniques, rendering the preference of charge storage mechanism: faradaic or nonfaradaic. Results showed a higher capacity for Na + -ion storage and a higher Coulombic efficiency for Li + /Na + /K + -ion storage, to preface future studies of efficient storage within quasi-0D fullerene-like nanoparticles.…”

“…Restriction of voltage cutoff plays a crucial role in maintaining the electrode materials’ structural integrity, resulting in consistent and reliable capacity. 23 , 24 Although energy density and specific capacity decrease with the reduced voltage cutoff (a high upper cut-off), long-term cyclability can be achieved by limiting voltage cutoff for a wide range of applications. 25 − 27 Grid energy storage devices or portable electronics require numerous cycles over the operational lifetime; hence, ensuring batteries with high cyclability is crucial for sustainable performance.…”

Controlled growth of a 2D/2D heterojunction for high-performance sodium ion storage

“…35 It has been successfully utilized as an anode for rapid Na + storage. [36][37][38][39] However, the intrinsic specific capacity is low due to the high molecular weight and serious 2D restacking. To enhance the electrochemical performance, Ti 3 C 2 T x is modified by combining it with metal oxides, polymers, metal sulfides, and nano carbons.…”