Crystallinity Regulated Functional Separator Based on Bimetallic NixFey Alloy Nanoparticles for Facilitated Redox Kinetics of Lithium–Sulfur Batteries DOI
Qing Liu, Xiaotong Han, Zhiyong Zheng

et al.

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(47)

Published: Sept. 28, 2022

Abstract The practical application of lithium–sulfur batteries (LSBs) is limited by the shuttle effect lithium polysulfides (LiPSs), large volume expansion, and sluggish conversion kinetics sulfur. Herein, crystallinity regulation Ni x Fe y alloy anchored on oxidized carbon nanotube/nitrogen‐doped graphene (Ni @OCNT/NG) for a functional separator into LSBs demonstrated. A low crystalline @OCNT/NG (LC‐Ni modified polypropylene systematically compared with its highly counterpart (HC‐Ni @OCNT/NG), demonstrating superior LiPS absorbability, redox mediating capability facilitated kinetics, uniform flux Li + anode. Furthermore, theoretical calculations confirm that LC‐Ni features high adsorption energies diffusion energy barriers toward LiPSs, as well decreased gap larger electron density near Fermi level. Accordingly, LSB cells separators deliver specific capacity 1379.13 mA h g −1 at 0.1 C decay ratio 0.04%/cycle over 600 cycles 5.0 410 . Even under sulfur loading (5.37 mg cm −2 ) lean electrolyte (E/S = 4.9 µL conditions, @OCNT/NG/PP areal 4.1 mAh 0.2 C.

Language: Английский

Bifunctional Nb-N-C atomic catalyst for aqueous Zn-air battery driving CO2 electrolysis DOI Open Access

Sanshuang Gao,

Tianwei Wang, Mengmeng Jin

et al.

Science China Materials, Journal Year: 2022, Volume and Issue: 66(3), P. 1013 - 1023

Published: Nov. 18, 2022

Language: Английский

Citations

67
Highly dispersed Ru clusters toward an efficient and durable hydrogen oxidation reaction DOI
Ge Meng,

Huijie Cao,

Tianran Wei

et al.

Chemical Communications, Journal Year: 2022, Volume and Issue: 58(84), P. 11839 - 11842

Published: Jan. 1, 2022

Here, Ru clusters supported on nitrogen-doped hollow carbon spheres show a remarkable activity and durability toward the hydrogen oxidation reaction (HOR) H2-O2 fuel cell performance in alkaline media. Theoretical simulations indicate that endow thermodynamically favourable HOR kinetics an optimal adsorption affinity.

Language: Английский

Citations

66
Direct Z-Scheme Photocatalytic System: Insights into the Formative Factors of Photogenerated Carriers Transfer Channel from Ultrafast Dynamics DOI

Anqi Shi,

Dazhong Sun, Xuemei Zhang

et al.

ACS Catalysis, Journal Year: 2022, Volume and Issue: 12(15), P. 9570 - 9578

Published: July 21, 2022

The direct Z-scheme photocatalytic heterojunction, possessing type II band alignments but simultaneously realizing the spatial separation of photogenerated electrons and holes (PEHs) well-preserved strong redox ability, is a promising strategy for solving energy environmental issues. However, conventional method solely relying on direction interfacial electric field (IEF) to determine often different with experiments. Properly evaluating constructing remain limited. Herein, combining hybrid density functional theory excited state ultrafast dynamics simulation, we find that formative factor path comes from two aspects by systematically exploring series prototypical heterojunctions taking X2Y3 ferroelectrics (X: Al, Ga, In. Y: S, Se, Te) BCN semiconductors. On one hand, interlayer recombination PEHs weak ability can be significantly promoted IEF. other nonadiabatic coupling interface transfer channel plays key role in preserving high activity PEHs, which extend reacting time femtosecond hundreds nanosecond scale. This study deepens understanding formation accelerate design photocatalysts.

Language: Английский

Citations

65
Rb2CdSi4S10: novel [Si4S10] T2-supertetrahedra-contained infrared nonlinear optical material with large band gap DOI
Jiazheng Zhou,

Zhongxu Fan,

Kewang Zhang

et al.

Materials Horizons, Journal Year: 2022, Volume and Issue: 10(2), P. 619 - 624

Published: Nov. 25, 2022

Infrared nonlinear optical (IR-NLO) materials with wide band gaps are important for generating high-power laser light modern technologies. Herein, a gap IR-NLO material, Rb2CdSi4S10, was rationally designed and fabricated by introducing NLO-active [Si4S10] T2-supertetrahedron (ST) into the quaternary sulfide system. The Rb2CdSi4S10 shows largest (4.23 eV) among chalcogenide reported, which results in high laser-induced damage threshold (LIDT) of ∼5 × AgGaS2 (AGS) at 1064 nm. At same time, it has moderate second-harmonic generation (SHG) response (0.6 AGS). Based on statistical analyses, is first compound to be discovered AI2BIICIV4QVI10 family, also Si-rich material T2-supertetrahedra. indicate that promising new T2-ST unit could used exploration excellent performances.

Language: Английский

Citations

56
Crystallinity Regulated Functional Separator Based on Bimetallic NixFey Alloy Nanoparticles for Facilitated Redox Kinetics of Lithium–Sulfur Batteries DOI
Qing Liu, Xiaotong Han, Zhiyong Zheng

et al.

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(47)

Published: Sept. 28, 2022

Abstract The practical application of lithium–sulfur batteries (LSBs) is limited by the shuttle effect lithium polysulfides (LiPSs), large volume expansion, and sluggish conversion kinetics sulfur. Herein, crystallinity regulation Ni x Fe y alloy anchored on oxidized carbon nanotube/nitrogen‐doped graphene (Ni @OCNT/NG) for a functional separator into LSBs demonstrated. A low crystalline @OCNT/NG (LC‐Ni modified polypropylene systematically compared with its highly counterpart (HC‐Ni @OCNT/NG), demonstrating superior LiPS absorbability, redox mediating capability facilitated kinetics, uniform flux Li + anode. Furthermore, theoretical calculations confirm that LC‐Ni features high adsorption energies diffusion energy barriers toward LiPSs, as well decreased gap larger electron density near Fermi level. Accordingly, LSB cells separators deliver specific capacity 1379.13 mA h g −1 at 0.1 C decay ratio 0.04%/cycle over 600 cycles 5.0 410 . Even under sulfur loading (5.37 mg cm −2 ) lean electrolyte (E/S = 4.9 µL conditions, @OCNT/NG/PP areal 4.1 mAh 0.2 C.

Language: Английский

Citations

55