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).
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