为了抑制穿梭效应，采用固相合成法合成了聚酞菁镍（NiPPc）和聚酞菁铁（FePPc）。2种金属聚酞菁含有大量的M—N₄单元，增强了基体与多硫化物的化学吸附，抑制多硫化锂的溶解，提高固硫效果，而且能催化加速硫化锂与多硫化锂间的转化反应。丰富的氮杂原子也可增强载体与单质硫或多硫化物之间的相互作用，更有效地缓解穿梭效应，改善锂硫电池的性能。结果表明，S@FePPc在0.2 C的初始放电比容量为1 086 mAh/g，200周循环后的容量保持率为41.7%，在2 C的大电流密度下的放电比容量仍达到536 mAh/g。

In order to restrain the shuttle effect,nickel polyphthalocyanine (NiPPc) and iron polyphthalocyanine (FePPc) are respectively synthesized through a solid synthesis method.Both of the samples are aggregates of stacked sheets with homogeneous distribution of various elements,and contain abundance of M-N₄ units that enhance the chemical adsorption of metal polyphthalocyanine to polysulfides,inhibit the dissolution of lithium polysulfide,and enhance the sulfide anchoring.As well,these units can catalytically accelerate the conversion reaction between lithium sulfide and lithium polysulfide.Abundant nitrogen heteroatoms also reinforce the interaction between the substrate and elemental sulfur or polysulfide to alleviate the shuttle effect and improve the performances of lithium sulfur battery.S@FePPc electrode delivers an initial discharge capacity of 1 086 mAh·g^-1 at 0.2 C with a capacity retention of 41.7% after 200 cycles.At a high rate of 2 C,S@FePPc electrode achieves a capacity of 536 mAh·g^-1.

江文毫(1994-),男,硕士研究生,研究方向为锂硫电池正极材料,963217716@qq.com