Aluminium substitution in Sb₂S₃ nanorods enhances the stability of the microstructure and high-rate capability in the alloying regime.

ABSTRACT: 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_1.9Al_0.1S₃ 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 (<20% retention after 200 cycle

SUBMITTER: Budumuru AK 

PROVIDER: S-EPMC10012877 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature