Twin boundary Cd_xZn_1−xS: a new anode for high reversibility and stability lithium/sodium-ion batteries

Abstract

Defect engineering is considered as an effective strategy to improve the electrochemical performance of batteries because of its ability promoting ion diffusion and increasing reactive sites in electrode materials. Twin...

Sn-Doping in a Sb2Se3 Conversion-cum-Alloying Material Renders Efficient Sodium-Ion Electrochemical Performance: Facile Kinetics Achieved by Active Metal Doping

“…The defects may be directly contributing to alkali-ion storage by promoting cation diffusion and enhancing the reactive sites in electrode materials for better alkali-ion uptake. 51,52 The selected-area electron diffraction (SAED) patterns of Sn 0.2 Sb 1.8 Se 3 (Figure 2e) depict a dot pattern consistent with the polycrystalline features as compared to a perfect single crystal dot pattern of pristine Sb 2 Se 3 (see Figure S3d). The SAED analysis reveals that all the prominent planes of The effect is directly ascribed to the surface energy, which in turn has an effect on the growth directions and thus determines the shape of the final nanocrystal.…”

“…This observation clears the doubt regarding the particle being any impurity, in strict correspondence with XRD revelations, and agrees with the granular rod-like morphology as proposed. The defects may be directly contributing to alkali-ion storage by promoting cation diffusion and enhancing the reactive sites in electrode materials for better alkali-ion uptake. , The selected-area electron diffraction (SAED) patterns of Sn 0.2 Sb 1.8 Se 3 (Figure e) depict a dot pattern consistent with the polycrystalline features as compared to a perfect single crystal dot pattern of pristine Sb 2 Se 3 (see Figure S3d). The SAED analysis reveals that all the prominent planes of Sb 2 Se 3 are present.…”

Design of Gradient Ti Reconstituted Fe2O3 Anodes with Enhanced Lithium Affinity Modulated Electronic Structures: First-Principles Calculations and Experiment Verification

“…As a result, the gradient Ti-doped Fe 2 O 3 electrode achieved a discharge-specific capacity of 1763 mAh g –1 , while Fe 2 O 3 (Figure S9) achieved a discharge-specific capacity of only 1323 mAh g –1 at a current density of 0.1 A g –1 . The irreversible capacity loss exhibited during initial discharge/charging is mainly attributed to the formation of a solid electrolyte film and other side reactions. , …”

“…The irreversible capacity loss exhibited during initial discharge/ charging is mainly attributed to the formation of a solid electrolyte film and other side reactions. 37,50 The rate performance (Figure 5c) was evaluated under various current densities for the electrochemical performance superiority of the Ti gradient concentration modification. As for Ti-doped Fe 2 O 3 , the charge-specific capacities of 752.3, 585.0, 481.6, 368.0, 219.4, and 124.1 mAh g −1 are obtained at the current densities of 0.2, 0.5, 1, 2, 5, and 10 A g −1 , respectively.…”

Triptycene-Based Polymer-Incorporated CdxZn1–xS Nanorod with Enhanced Interfacial Charge Transfer for Stable Photocatalytic Hydrogen Production in Seawater

“…Construction of noble-metal-free catalysts with solar-driven H 2 generation in natural seawater is considered as a promising way to solve the shortage of energy. − In recent years, Cd x Zn 1– x S as a bimetal solid solution has attracted considerable attention due to its tunable/suitable band gap, excellent photoelectric properties, and low cost, in which bimetal chalcogenide usually shows higher H 2 production activity than single metal sulfide (CdS and ZnS). − For instance, ZnS needs to be activated by UV light, which reduces the utilization of visible light . By adjusting the value of x in Cd x Zn 1– x S, the range of the band gap can be changed to compensate for the deficits of CdS and ZnS. , In spite of the Cd x Zn 1– x S solid solution with a good H 2 evolution rate, it still suffers from severe photocorrosion in seawater as well as rapid charge recombination.…”