The enhancement of supercapacitors performances of LaMnO3±δ perovskite by Ag-doping

Effects of Calcium Substitution for La on the Electrochemical Performance of LaMnO3 Nanoparticles

“…The grain size of La 1− x Ca x MnO 3 ( x =0, 0.05, 0.1, 0.15, and 0.2) samples is slightly reduced. This is mainly because the increased Ca‐doping leads to increased lattice defects in La 1− x Ca x MnO 3 ( x =0, 0.05, 0.1, 0.15, and 0.2) nanoparticles, and the growth of grains is inhibited, resulting in the inability of grains to grow [22] . To further investigate the effect of Ca‐doping on the morphology of the samples, the morphology of LaMnO 3 and La 0.85 Ca 0.15 MnO 3 samples were observed using TEM, as demonstrated in Figures 2(f) and (h).…”

“…This is mainly because the increased Ca-doping leads to increased lattice defects in La 1À x Ca x MnO 3 (x = 0, 0.05, 0.1, 0.15, and 0.2) nanoparticles, and the growth of grains is inhibited, resulting in the inability of grains to grow. [22] To further investigate the The BET surface analysis was performed on La 1À x Ca x MnO 3 (x = 0, 0.05, 0.1, 0.15, and 0.2) samples, the N 2 adsorption and desorption isothermal curves and the pore size distribution are obtained (Figure S1). The curves of La 1À x Ca x MnO 3 (x = 0, 0.05, 0.1, 0.15, and 0.2) samples show a type IV hysteresis loop between the adsorption-desorption curves, [33] which indicates the mesoporous region of the prepared samples due to N 2 uptake at the relative pressure (Figure S1(a)).…”

Honeycomb LaMnO3 Perovskite Synthesized by a Carbon Sphere as a Self-Sacrificing Template for Supercapacitors

“…When excessive oxygen is embedded into the lattice of LM, the single redox peak splits into two peaks. During this process, the positive charge center of Mn on the surface moves slightly toward the intercalation of oxygen ions, thus making the valence state of Mn increase, which can be explained by eq . , …”

Dielectric and electrochemical performance of rhombohedral lanthanum manganite perovskite nanostructures

“…60 It is interesting to note that the areal capacitance of the L7 sample is much higher than those previously reported for LaMnO 3 electrodes as shown in Table 3. The areal energy density (ED A ) and areal power density (PD A ) of the L7 sample at different current densities were calculated using eqn ( 14) and (15), respectively, and are plotted in Fig. 9f and g.…”

“…In most of the reports, the electrochemical performance of pristine LaMnO 3 is poor. 7,12,13 But there are several methods like doping, 14,15 encapsulation 16,17 with other efficient materials, partial replacement of La 18,19 and Mn 20 ions with others, incorporation of conducting polymers 21 and many surface area modification 22 strategies that can be used to enhance the performance of the electrodes. The anion charge storage through oxygen intercalation as a consequence of its innate oxygen vacancies in LaMnO 3 perovskite oxide is found to be the key factor for its energy storage capacity.…”