Achieving Non-Interfacial Blocking Zinc Ion Transport Based on MOF Derived Manganese Oxides and Amorphous Carbon Hybrid Materials

Graphical Base on the combination of co-precipitation method and carbonization, the architecture of non-interfacial blocking manganese oxides and amorphous carbon hybrid materials are synthesized. MOF-derived hybrid electrodes obtained a specific capacity of 132.6 mAh g −1 under 2 A g −1 , and it still has a specific capacity of 105 mAh g −1 at 1 A g −1 for 2000 cycles. In addition, the electrode reaction mechanism of MOF-derived hybrid electrodes in ZIBs is analyzed by ex-situ XRD and in-situ Raman tests and the model battery is assembled to present practical possibilities. This study provides an innovation strategy for efficient electron ion transport of Mn-based materials, and offers a route to the practical electrode of ZIBs. How to coordinate electron and ion transport behavior across scales and interfaces within ion battery electrodes? The exponential increase in surface area observed in nanoscale electrode materials results in an incomprehensibly vast spatial interval. Herein, to address the problems of volume expansion, dissolution of cathode material, and the charge accumulation problem existing in manganiferous materials for zinc ion batteries, metal organic framework is utilized to form the architecture of non-interfacial blocking ~10 nm Mn 2 O 3 nanoparticles and amorphous carbon hybrid electrode materials, demonstrating a high specific capacity of 361 mAh g −1 (0.1 A g −1 ), and excellent cycle stability of 105 mAh g −1 after 2000 cycles under 1 A g −1 . The uniform and non-separated disposition of Mn and C atoms constitutes an interconnected network with high electronic and ionic conductivity, minimizing issues like structural collapse and volume expansion of the electrode material during cycling. The cooperative insert mechanism of H + and Zn 2+ are analyzed via ex-situ XRD and in-situ Raman tests. The model battery is assembled to present practical possibilities. The results indicate that MOF-derived carbonization provides an effective strategy for exploring Mn-based electrode materials with high ion and electron transport capacity.