Solvothermal synthesis of Sn₃N₄ as a high capacity sodium-ion anode: theoretical and experimental study of its storage mechanism

Abstract

A new simple and scalable method to synthesise spinel-structured Sn3N4 has been developed using SnCl4 and LiNH2 precursors under solvothermal conditions. Nanocrystalline Sn3N4 with a crystallite size <10 nm was...

High Sodium‐Ion Battery Capacity in Sulfur‐Deficient Tin(II) Sulfide Thin Films with a Microrod Morphology

“…The low efficiency of the first reduction and oxidation was attributed to irreversible processes such as SEI formation. [ 7,25 ] After the first cycle, subsequent cycles exhibited reversible and stable electrochemistry, with 93% charge–discharge coulombic efficiency measured after five cycles. The capacity was 638 mAh g −1 for reduction and 593 mAh g −1 for oxidation at the 50th cycle.…”

“…Other tin standards (Sn, Na 4 Sn, SnO 2 ) were reused from a previous study. [ 7 ] Comparability between new and previous standards was verified using the spectrum of a tin standard foil that had been placed after the sample detector during data collections.…”

“…Tin has a theoretical capacity of 847 mAh g À1 when fully sodiated to Na 15 Sn 4 , but with a 420% volume change during the alloying/dealloying reactions that results in degradation. [4,7] Tin(II) sulfide is a layered semiconductor material with a wide range of electronic applications. [8] SnS crystallizes with a GeS-type orthorhombic structure, with layers connected by weak Van der Waal's forces along the c-axis.…”

“…Tin has a theoretical capacity of 847 mAh g −1 when fully sodiated to Na 15 Sn 4 , but with a 420% volume change during the alloying/dealloying reactions that results in degradation. [ 4,7 ]…”