Heterogeneous interface design of bimetallic selenide nanoboxes enables stable sodium storage

Abstract

The exploitation of proper nanomaterials with embedded-conversion-alloy features is of great significance for accelerating the realization of Na-ion batteries (NIBs). In this work, a unique nanobox consisting of heterojunction bimetallic...

Terminal Group‐Oriented Self‐Assembly to Controllably Synthesize a Layer‐by‐Layer SnSe2 and MXene Heterostructure for Ultrastable Lithium Storage

“…[ 43,44 ] In Figure 2i, there are two peaks at 53.7 and 54.6 eV, ascribed to Se 3d 5/2 and Se 3d 3/2 (Se 2− ), respectively. [ 45 ] Moreover, the peaks of elemental Se were not detected, which indicates that the selenization reaction is very sufficient. Figure 2j displays the Ti 2p XPS spectrum.…”

Cotton textile inspires MoS2@reduced graphene oxide anodes towards high-rate capability or long-cycle stability sodium/lithium-ion batteries

“…22,23 In addition, the broad D and G bands with an intensity ratio of 1.07 are found at 1350 and 1585 cm −1 , respectively, which are derived from the CC textile and RGO. 24–27…”

“…22,23 In addition, the broad D and G bands with an intensity ratio of 1.07 are found at 1350 and 1585 cm −1 , respectively, which are derived from the CC textile and RGO. [24][25][26][27] TG analysis was conducted on PCC/MoS 2 , CC/MoS 2 and CC/ MoS 2 @RGO composites from room temperature to 700 °C in an oxygen atmosphere to determine the content of the MoS 2 active material (Fig. S2 † and Fig.…”

Nonporous Oxide-Terminated Multicomponent Bulk Anode Enabling Energy-Dense Sodium-Ion Batteries

“…The abundant sodium (Na) resources in the earth’s crust and seawater provide a great opportunity for sodium-ion battery (SIB) technologies to satisfy the requirements of large-scale energy storage systems. − SIBs have an edge over Li-ion batteries (LIBs) due to the limited and unevenly distributed nature of lithium (Li) resources. − Much effort has been dedicated to investigating suitable electrode materials to take advantage of cost-effective and ubiquitous Na-ion chemistry in recent years. − Alloy-type anode materials (e.g., antimony (Sb) and tin) have emerged as potential energy density boosters to overcome the low energy density of SIBs (<165 Wh kg –1 and <375 Wh L –1 ), with higher capacities than conventional insertion-type graphite (30–35 mA h g –1 for NaC 64 ) and other carbonaceous materials, such as hard carbon (≈300 mA h g –1 ). − Metallic Sb anodes have gained attention because of their high theoretical capacity (660 mA h g –1 and 1130 mA h cm –3 for Na 3 Sb) and suitable/safe range of operation voltage (0.4–0.8 V vs Na/Na + ). − However, the significant volume variation of 390% owing to the high Na stoichiometry of Sb impedes the practical utilization of Sb anodes as Sb undergoes particle cracking and shattering during electrochemical cycling due to the large-volume-change, subsequently causing rapid battery degradation . The cracking behavior of Sb particles accelerates liquid electrolyte consumption and the formation of a thick/unstable solid electrolyte interphase (SEI), which blocks subsequent charge transfer and Na-ion diffusion …”