High‐Entropy Prussian Blue Analogues and Their Oxide Family as Sulfur Hosts for Lithium‐Sulfur Batteries

The introduction of high-entropy into Prussian blue analogues (PBAs) has yet to attract attention in the field of lithium-sulfur battery materials. Herein, we systematically synthesize a library of PBAs from binary to high-entropy by a facile coprecipitation method. The coordination environment in PBAs is explored by X-ray absorption fine structure spectroscopy, which together with elemental mapping confirm the successful introduction of all metals. Importantly, electrochemical tests demonstrate that high-entropy PBA can serve as polysulfide immobilizer to inhibit shuttle effect and as catalyst to promote polysulfides conversion, thereby boosting its outstanding performance. Additionally, a variety of…

• NN
  National Natural Science Foundation of China

  Award: U1904215
• NS
  Natural Science Foundation of Jiangsu Province

  Award: BK20200044