Double perovskite La2CoMnO6 hollow spheres prepared by template impregnation for high-performance supercapacitors

Advances and Perspectives for the Application of Perovskite Oxides in Supercapacitors

“…As a result, the diameter of La 2 CoMnO 6 particles prepared by template impregnation is 1 μm, which is 100 times that of La 2 CoMnO 6 synthesized by the sol–gel method. Therefore, the capacitance of La 2 CoMnO 6 prepared by the template method is 4 times higher than that prepared by the sol–gel method …”

“…In addition, substitution of A- or B-site elements can make a single perovskite oxide turn into double perovskite oxides with an ordered structure. Also, double perovskite oxides can be converted from ABO 3 under a reduced atmosphere. , The double perovskite oxides, such as La 2 CoMnO 6 , Y 2 NiMnO 6 , Ba 2 Bi 0.1 Sc 0.2 Co 1.7 O 6 , PrBaMn 2 O 6 , Sr 2 CoMoO 6 , etc., were intensely probed in SCs. ,,,, Among them, PrBaMn 2 O 6 with the A-site cation ordered structure was converted from Pr 0.5 Ba 0.5 MnO 3−δ under a H 2 atmosphere and Ba 2 Bi 0.1 Sc 0.2 Co 1.7 O 6 and Sr 2 CoMoO 6 with the B-site cation ordered structure were synthesized in air conditions. ,− Specially, a doubly ordered perovskite oxide (AA′BB′O 6 ) with A/A′ cation order and B/B′ cation order was first reported by NaLaMgWO 6 . These ordered structures in perovskite oxides facilitate the accommodation of a greater concentration of oxygen vacancies because the metal ions are in the lower valence state.…”

“…In comparison to single perovskite oxide, double or triple perovskite oxide with abundant metal ions has high adjustability. Many reports were about the potential or successful application of double perovskite (AA′BB′O 6 ) as the electrode material for SCs. ,,− ,,,− In addition to the internal tuning of a simple double perovskite, further modifications can be made to its surface area.…”

“…The application of double perovskite oxides and triple perovskite oxides grows rapidly, and more feasible ways to modify their performance in SCs have been developed. ,,,, Also, for some quick reference as well as inspiration of innovative concepts for the next studies, it is necessary to implement a timely summary to systematically introduce the latest development direction in the field of SCs with a perovskite oxide electrode, owing to its vigorous development in recent years. ,, This study summarizes the modification rules of perovskite oxides, including morphology design, doping strategy, and composite with other materials. Particularly, for double perovskite oxide, the process of phase transition transformation under a reduced atmosphere and the changes brought about by the segregation of B-site metal ions were discussed in detail.…”

Nano-Sized Double Perovskite Oxide as Bifunctional Oxygen Electrocatalysts

“…Besides, Nano-sized perovskite oxide catalysts can expose abundant active sites, which can make full use of the advantage of high intrinsic activity perovskite oxide [16][17][18][19][20]. Compared with the conventional solid-state reaction, the molten-salt-assisted method is an effective method to synthesize controllable small powder, which is ascribed to the salt melt shows a high ion-diffusion rate and strong dissolving capability [21,22].…”