Cu- and S-doped multielement composite Cu/Mn3O4@SC microspheres derived from bimetallic CuMn-MOF as anode materials for lithium-ion batteries

• Published in: Journal of materials science Vol. 59; no. 9; pp. 3930 - 3946
• Main Authors: Miao, Xin, Wang, Liying, Shi, Yunxin, Chen, Guohua, Liu, Yunfei, Wu, Gaoqi, Cao, Zhenzhu, Zhang, Yongfeng
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.03.2024; Springer Nature B.V
• Subjects: Anodes; Bimetals; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Crystallography and Scattering Methods; Dicarboxylic acids; Diffusion rate; Electrode materials; Energy Materials; Energy storage; Heterojunctions; Intermetallic compounds; Ion diffusion; Lithium; Lithium-ion batteries; Manganese oxides; Materials Science; Metal-organic frameworks; Microspheres; Polymer Sciences; Rechargeable batteries; Solid Mechanics; Synergistic effect
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-024-09401-1

Microsphere 3D structure of Cu/Mn 3 O 4 @SC composite was fabricated by pyrolyzing the bimetallic CuMn-MOF, which was composed of Cu 2+ , Mn 2+ and sulfur-containing ligand 2,5-thiophene dicarboxylic acid (H 2 TDC). The composite of Cu/Mn 3 O 4 @SC is used as a high-performance anode material for the lithium-ion batteries cycle exhibiting stable capacities of 715 mAh g −1 after 100 cycles at 200 mA g −1 and outstanding long cycle performance with a reversible capacity of 508 mAh g −1 at 0.5 A g −1 after 500 cycles. The superior performance for the Cu/Mn 3 O 4 @SC anode is mainly attributed to the mutual supporting characteristics of heterojunction synergistic effect, thus avoiding damage in the process of energy storage process. In addition, the kinetic analysis based on CV reveals that the transport kinetics mechanism of the Cu/Mn 3 O 4 @SC is synergistically controlled by the surface capacitive and pseudocapacitive behaviors. The EIS proves that the introduction of Cu enhances the conductivity of the material and the rate of lithium-ion diffusion. Graphical abstract Cu- and S-doped multielement microspheres was fabricated by pyrolyzing CuMn-MOF supported by 2, 5-thiophene dicarboxylic acid.