Sulfur-rich MoS3 cathode for high-performance room-temperature liquid and solid-state lithium metal batteries

Sulfur-based compounds have been considered one of the most attractive cathode materials for next-generation batteries owing to their high energy density and environmental benignity. Among them, metal sulfides like MoS 2 show high conductivity as well as intrinsic catalytic activity , however, the sulfur content and specific capacity are relatively low. In this article, we proposed a sulfur-rich amorphous molybdenum trisulfide‑carbon nanotubes (MoS 3 -CNT) cathode via in situ deposition. Benefiting from the enhanced electrical conductivity and enriched abundant reactive sites, the cathode exhibits impressive performance when assembled as liquid and solid-state lithium metal batteries at room temperature . In liquid lithium metal batteries , optimized MoS 3 -CNT20% cathode exhibits an impressive high specific capacity of 900.7 mAh/g in the first cycle, while the cycling stability is poor (35.4% after 50 cycles) owing to severe shuttle effect . When fabricated with polymer solid-state electrolyte, the cycling stability could be significantly improved to 85.7% after 50 cycles with an initial capacity of 314.2 mAh/g. This study provides a rational strategy for developing high-performance metal sulfide cathodes thus helping sustainable development.