Construction and K-ion Storage Properties of SnS₂/SnS/NC Heterostructures Micro-flowers

SnS₂ micro-flowers (MFs) were synthesized by hydrothermal, and then SnS₂/SnS/NC heterostructures micro-flowers (SSNC MFs) were constructed by PDA-derived carbon as reducing agent and buffer substrate. SSNC MFs was evaluated as KIBs anode material, the interfaces of SnS₂/Sn heterostructures facilitate the charge transfer and further improve the kinetics. Meanwhile, the nitrogen-doped carbon layer improved the conductivity and structural stability of the hybrid electrode. As a result, the as-prepared SSNC MFs electrode exhibits improved specific capacity, cycle stability and rate performance. It delivered the reversible capacity of 492.4 mAh/g at 0.1 A/g after 50 cycles and 199.6 mAh/g was remained at 2.0 A/g, which was much higher than that of the SnS₂ MFs electrode (132.1 mAh/g and 28.4 mAh/g at the same condition, respectively).