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

Abstract

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 nanocubic metal oxides from binary to senary are fabricated by using PBAs as sacrificial precursors. We believe that a wide range of new materials obtained from our coprecipitation and pyrolysis methodology can promote further developments in research on PBA systems and sulfur hosts.

Migration: A Neglected Potential Contribution of HCl-Oxidized Au(0)

“…A 1 wt.% Au loading was required to ensure sufficient Au species supplied under the experimental conditions, to avoid possible errors caused by low loading. The metal content was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) [ 21 ] and detected at approximately 0.98 wt.% Au mass, basically matching the expected 1 wt.% Au loading ( Table 1 ). The Au loading was further verified by the X-ray fluorescence (XRF) results, and 1.07 wt.% Au loading was gained.…”

Designing strategies and enhancing mechanism for multicomponent high-entropy catalysts

“…They found that the high-entropy PBA can not only inhibit the shuttle effect by serving as a polysulfide immobilizer but also as catalyst to promote polysulfide conversion, thereby boosting its Li-S battery performance. 104 Although cation regulation was widely used…”

“…They found that the high-entropy PBA can not only inhibit the shuttle effect by serving as a polysulfide immobilizer but also act as a catalyst to promote polysulfide conversion, thereby boosting its Li–S battery performance. 104 Although cation regulation has been widely used so far, the anion regulation certainly provides a new route for the property adjustment for various applications such as batteries, electrolytes, etc. , and more novel high-entropy compounds can be expected in future.…”

The Rise and Development of MOF‐Based Materials for Metal‐Chalcogen Batteries: Current Status, Challenges, and Prospects

“…Since reported in the 1990s, MOF‐based materials have been well developed in the past three decades and have broad application prospects in many fields such as adsorption, separation, sensors, biomedicine, catalysis, and electrochemical energy storage, which stems from their diverse crystalline structures. [ 73–81 ] MOFs are constructed by linking metal nodes (metal ions or clusters) with organic linkers ( Figure 3 a), and some representative metal node configurations and organic linkers (mainly carboxylic acids or nitrogenous ligands) are shown in Figure 3b,c. [ 82 ] Such coordination enables a pore space to appear in the structural unit of MOFs (Figure 3a), and the porous structure is further formed with periodic combination, resulting in large specific surface areas of MOFs in the range of 1000–10000 m 2 g −1 .…”

“…Since reported in the 1990s, MOF-based materials have been well developed in the past three decades and have broad application prospects in many fields such as adsorption, separation, sensors, biomedicine, catalysis, and electrochemical energy storage, which stems from their diverse crystalline structures. [73][74][75][76][77][78][79][80][81] MOFs are constructed by linking metal nodes [57] Copyright 2018, Elsevier. Separator part: Reproduced with permission.…”