Aluminium substitution in SbS nanorods enhances the stability of the microstructure and high-rate capability in the alloying regime

• Published in: Nanoscale advances 2023-03, Vol.5 (6), p.182-1815
• Main Authors: Budumuru, Akshay Kumar, Yelamnchi, Lokeswararao, Sudakar, Chandran
• Format: Article
• ISSN: 2516-0230
• DOI: 10.1039/d2na00695b

Alloy anodes, with twice the capacity of graphite, are promising for next-generation lithium-ion batteries (LIBs). However, poor rate-capability and cycling stability, mainly due to pulverization, have limited their application. By constraining the cutoff voltage to the alloying regime (1 V to 10 mV vs. Li/Li + ), we show that Sb 1.9 Al 0.1 S 3 nanorods provide excellent electrochemical performance, with an initial capacity of ∼450 mA h g −1 and excellent cycling stability with 63% retention (capacity ∼240 mA h g −1 after 1000 cycles at 5C-rate), unlike 71.4 mA h g −1 after 500 cycles observed in full-regime cycling. When conversion cycling is also involved the capacity degrades faster (