Perovskite SrCo1-Ti O3-δ as anion-intercalated electrode materials for supercapacitors

Flexible All-Solid-State Asymmetric Supercapacitors Based on PPy-Decorated SrFeO3−δ Perovskites on Carbon Cloth

“…These features indicate the presence of microtwinned domains, which are speculated to originate from the oxygen vacancy arrangement of defective perovskite. , Moreover, the microtwinned domains decrease with the structural change and random distribution of oxygen atoms. A similar phenomenon has been reported in some defective perovskites, ,, the generation of these defects is speculated to be related to the increase of oxygen vacancy, which is consistent with XPS-O spectra analysis, and correspondingly influence the electrochemical performance. Thus, PPy not only modifies the surface morphology but also affects the internal structure of SrFeO 3−δ perovskite by introducing more oxygen vacancy.…”

“…In our previous work, we also optimized the electrochemical performance of SrCoO 3 perovskite by the B-site ion substitution with Nb and Ti. The resulting SrCo 0.875 Nb 0.125 O 3 and SrCo 0.9 Ti 0.1 O 3−δ presented specific capacitances of 894 mF cm –2 at 1 mA cm –2 and 625.0 F g –1 at 1 A g –1 , respectively. , Moreover, the electrochemical performance can be further improved by combining perovskite materials with Ag, Pt, and other precious metals or carbon materials by increasing electrode conductivity. Metal oxides and conductive polymers were also used to hybridize with perovskite materials to achieve higher energy storage. − In short, Sr-based perovskite oxides have received considerable attention and demonstrated great potential as a positive electrode material for supercapacitors, but perovskite-based negative electrode material is rarely reported.…”

Temperature‐Dependent Electrochemical Performance of Ta‐Substituted SrCoO3 Perovskite for Supercapacitors

“…Table S1 exhibits the refined BÀ O-B bond angle and BÀ O bond length data, which coincide with the structure schematic diagrams in Figure S1. In our previous work, [26] it was determined that the parent SrCoO 3-δ is composed of two phases: the major hexagonal phase and with minor cubic phase. After Ta substitution, a stable single-phase was obtained, and the main structure changed from hexagonal to tetragonal.…”

The Preparation and Modification of Strontium Titanate Ceramic Films for High‐Performance Flexible Supercapacitor

“…Under the three‐electrode system with 1 M Na 2 SO 4 neutral electrolyte solution, the C s of SCN can reach 894 mF ⋅ cm −2 at 1 mA ⋅ cm −2 , which is about 1.5 times of La 2 Y x Zr 2‐x O 3 with the same test conditions [15] . Moreover, Ma, Pian Pian's group has synthesized a series of Ti‐substituted perovskite SrCo 1‐x Ti x O 3‐δ (x=0, 0.05, 0.10, 0.15, 0.20) by solid‐state reaction method for anion‐intercalated supercapacitor electrode materials, and a highest C s of 625.0 F ⋅ g −1 at 1 A ⋅ g −1 is achieved in SrCo 0.9 Ti 0.1 O 3‐δ sample [16] . As well, its superior electrochemical performance can be attributed to the stable cubic structure with higher conductivity and large amount of oxygen vacancy which directly contributes to the anion‐intercalated energy storage.…”

“…[15] Moreover, Ma, Pian Pian's group has synthesized a series of Ti-substituted perovskite SrCo 1-x Ti x O 3-δ (x = 0, 0.05, 0.10, 0.15, 0.20) by solid-state reaction method for anion-intercalated supercapacitor electrode materials, and a highest C s of 625.0 F • g À 1 at 1 A • g À 1 is achieved in SrCo 0.9 Ti 0.1 O 3-δ sample. [16] As well, its superior electrochemical performance can be attributed to the stable cubic structure with higher conductivity and large amount of oxygen vacancy which directly contributes to the anion-intercalated energy storage. Thus, we can fabricate a kind of perovskite-type composite oxides self-supporting film with electrospinning techniques, such as SrTiO 3 , to improve the electrochemical properties of flexible electrodes.…”