Flower-like Cu2SnS3 Nanostructure Materials with High Crystallinity for Sodium Storage

Abstract

In this study, ternary Cu2SnS3 (CTS) nanostructure materials with high crystallinity were successfully prepared via a facile solvothermal method, which was followed by high-temperature treatment. The morphology of the as-synthesized samples is uniform flower-like spheres, with these spheres consisting of hierarchical nanosheets and possessing network features. Sodium storage measurements demonstrate that the annealed CTS electrodes have high initial reversible capacity (447.7 mAh·g−1 at a current density of 100 mA·g−1), good capacity retention (200.6 mAh·g−1 after 50 cycles at a current density of 100 mA·g−1) and considerable rate capability because of their high crystallinity and unique morphology. Such good performances indicate that the high crystallinity CTS is a promising anode material for sodium ion batteries.

Reduced Graphene Oxide Boosted Ultrafine Cu2SnS3 Nanoparticles for High‐performance Sodium Storage

“…Figure 4a presents the initial five CV profiles of CTS/RGO composite at a scanning rate of 0.2 mV s À 1 . [14] It is noted that the cathodic peak at about 0.25 V and the anodic peak at around 0.23 V imply the alloy and dealloy reaction of Sn with sodium ions, respectively. [38] A broad shoulder cathodic peak in the region of 0.91-0.42 V is ascribed to the multistep conversion of CTS with sodium into Cu, Sn and Na x S (x � 2).…”

“…[38] A broad shoulder cathodic peak in the region of 0.91-0.42 V is ascribed to the multistep conversion of CTS with sodium into Cu, Sn and Na x S (x � 2). [14] It is noted that the cathodic peak at about 0.25 V and the anodic peak at around 0.23 V imply the alloy and dealloy reaction of Sn with sodium ions, respectively. [39] Notably, a sharp anodic peak was identified at voltage of 1.65 V, which could be associated with reoxidation of Cu and Sn.…”

“…[10,11] For instance, attributing to its high theoretical specific capacity, preferable ionic conductivity and unique spatial structure (CdI 2 -layered structure), SnS 2 has been confirmed as a promising anode material. [13] In terms of the candidate materials, Cu 2 SnS 3 (CTS), a typical ternary Sn-based compound, has been considered as potential SIB anode materials owing to their multiple advantages: (i) it has high theoretical specific capacity (763.8 mA h g À 1 ); [14] (ii) its crystal structure is composed of the interlayer spaces and tunnels and the size is adequate for the diffusion of sodium ions; [15] (iii) introducing Cu, a high electronic conductivity with sodium inactive element, can effectively enhance the electrical conductivity of host materials and alleviate the volume effect to some extent during the battery operation process, thus improving the electrochemical performances. To further optimize the sodium storage properties of Sn-based sulfides, ternary compounds have been explored recently as anode materials.…”

“…To further optimize the sodium storage properties of Sn-based sulfides, ternary compounds have been explored recently as anode materials. [13] In terms of the candidate materials, Cu 2 SnS 3 (CTS), a typical ternary Sn-based compound, has been considered as potential SIB anode materials owing to their multiple advantages: (i) it has high theoretical specific capacity (763.8 mA h g À 1 ); [14] (ii) its crystal structure is composed of the interlayer spaces and tunnels and the size is adequate for the diffusion of sodium ions; [15] (iii) introducing Cu, a high electronic conductivity with sodium inactive element, can effectively enhance the electrical conductivity of host materials and alleviate the volume effect to some extent during the battery operation process, thus improving the electrochemical performances. [16] Unfortunately, bare CTS particle exhibits insufficient reversible capacity in comparison with its theoretical specific capacity and undesirable cycle stability as SIB anode owning to poor kinetics and residual volume effect.…”

Nanowire of WP as a High‐Performance Anode Material for Sodium‐Ion Batteries

“…This inspired us to design unique nanostructures contacted directly with ac onductive substrate as 3D integrated electrodes. [17][18][19][20][21][22] WP is also an interesting TMP for the electrochemical catalysis of the hydrogen evolution reaction [23] and methanol oxidation reaction, [24] but its applicationa sa na node for SIBs has not been explored before.…”