A metal–organic framework approach to engineer mesoporous ZnMnO 3 /C towards enhanced lithium storage

• Published in: Sustainable energy & fuels 2022-02, Vol.6 (4), p.1175-1185
• Main Authors: Hu, Xi, Huang, Qianhong, Zhang, Yuze, Zhong, Hao, Lin, Zhi, Lin, Xiaoming, Zeb, Akif, Xu, Chao, Xu, Xuan
• Format: Article
• Language: English
• ISSN: 2398-4902; 2398-4902
• DOI: 10.1039/D1SE01883C

Bimetal oxides with high theoretical capacities are one of the promising candidates for lithium-ion batteries (LIBs), yet they show lower cycling stability due to the inherent large volume effect and slow transport kinetics during the lithiation/delithiation process. Thus, to address these issues a simple MOF-5 templated strategy was developed to fabricate mesoporous ZnMnO 3 /C and to demonstrate it as an advanced anode material for LIBs. ZnMnO 3 /C was simply synthesized by solvothermal and subsequent carbonization processes. Benefiting from the electron transfer from carbon to ZnMnO 3 , the title anode material could efficiently reduce polarization, facilitate Li + transfer, enhance pseudocapacitive storage, and bring about excellent lithium storage performance, including superior reversible capacity, good rate capability, and long-lasting cycling stability. The results of Raman spectroscopy and density functional theory (DFT) calculations confirmed that after compounding with carbon, the band gap of ZnMnO 3 decreased, and the adsorption of Li + increased, which enhances the excellent electrochemical performances of ZnMnO 3 /C.