Engineering Bi2O3-Bi2S3 heterostructure for superior lithium storage

Abstract

Bismuth oxide may be a promising battery material due to the high gravimetric (690 mAh g−1) and volumetric capacities (6280 mAh cm−3). However, this intrinsic merit has been compromised by insufficient Li-storage performance due to poor conductivity and structural integrity. Herein, we engineer a heterostructure composed of bismuth oxide (Bi2O3) and bismuth sulphide (Bi2S3) through sulfurization of Bi2O3 nanosheets. Such a hierarchical Bi2O3-Bi2S3 nanostructure can be employed as efficient electrode material for Li storage, due to the high surface areas, rich porosity, and unique heterogeneous phase. The electrochemical results show that the heterostructure exhibits a high Coulombic efficiency (83.7%), stable capacity delivery (433 mAh g−1 after 100 cycles at 600 mA g−1) and remarkable rate capability (295 mAh g−1 at 6 A g−1), notably outperforming reported bismuth based materials. Such superb performance indicates that constructing heterostructure could be a promising strategy towards high-performance electrodes for rechargeable batteries.

Carbon Quantum Dot-Anchored Bismuth Oxide Composites as Potential Electrode for Lithium-Ion Battery and Supercapacitor Applications

“…17 In another case, Liu et al designed Bi 2 O 3 –Bi 2 S 3 heterostructure through partial sulfurization of Bi 2 O 3 nanosheets and demonstrated a coulombic efficiency of 83.7%. 18…”

Submicrospherical and Porous Bi2S3 Protected by Nitrogen‐Doped Carbon for Practical Anode Fabrication of Li‐Ion Batteries

“…During the first negative scan, the first significant reduction peak at about 1.66 V is attributed to the conversion reaction from Bi 2 S 3 to metallic Bi and Li x S (Li 2 S 4 , Li 2 S 3 , Li 2 S 2 or Li 2 S). The subsequent two neighboring reduction peaks at 0.73 and 0.64 V are derived from the formation of LiBi and Li 3 Bi alloys, respectively . During the following positive scan, the first sharp oxidation peak at 0.94 V is ascribed to the dealloying reaction of Li 3 Bi returning to Bi, the second weak peak at 2.2 V indicates the regeneration of Bi 2 S 3 , and the last weak peak at 2.54 V may be correlated with the Li‐ion extraction from layered Bi 2 S 3 .…”

Materials Based on Antimony and Bismuth for Sodium Storage

“…Bi and S atoms are linked together by intermolecular attraction, thus forming chain‐like building blocks parallel to the c‐axis (Figure f) . Bi 2 S 3 is considered a potential anode material for SIBs, as it has been applied in lithium batteries . Recently, Dou's group reported a high Na‐storage capacity of 658 mAh g −1 for Bi 2 S 3 nanorods .…”