Boosting the energy storage performance of MOF-derived Co3S4 nanoarrays via sulfur vacancy and surface engineering

Hierarchical Co₃S₄ hollow nanosheet arrays are prepared through a MOF-engaged strategy, followed by room-temperature NaBH₄ treatment, resulting in simultaneous regulation of sulfur vacancies and surface morphology. The obtained electrode exhibits excellent electrochemical properties due to large active sites, fast charge diffusion and high electronic conductivity resulting from the hierarchical hollow structure and rich sulfur vacancies.