Publication details
Microwave-assisted synthesis of a manganese metal-organic framework and its transformation to porous MnO/carbon nanocomposite utilized as a shuttle suppressing layer in lithium-sulfur batteries
| Authors | |
|---|---|
| Year of publication | 2019 |
| Type | Article in Periodical |
| Magazine / Source | Journal of Materials Science |
| MU Faculty or unit | |
| Citation | |
| Web | https://link.springer.com/article/10.1007%2Fs10853-019-03871-4 |
| Doi | http://dx.doi.org/10.1007/s10853-019-03871-4 |
| Keywords | HIGH-PERFORMANCE ANODES; ENHANCED-PERFORMANCE; OXIDATION-STATES; HOST MATERIALS; KETJEN BLACK; CARBON; SEPARATOR; COMPOSITE; GRAPHENE; MNO |
| Description | In this work, the microwave-assisted synthesis of manganese metal-organic framework (MOF) material is presented. Synthesis procedure is based on a microwave-assisted solvothermal reaction of manganese(III) acetylacetonate with biphenyl-4,4 '-dicarboxylic acid (Bpdc) in N,N '-dimethylformamide at the temperature of 160 degrees C. The obtained Mn-based metal-organic framework, labeled as Mn-Bpdc, was used as a precursor for the preparation of a porous MnO/carbon nanocomposite, which was obtained via thermal transformation in a nitrogen atmosphere at 700 degrees C. It was found that this approach provides an effective and simple preparation pathway for porous carbon decorated with homogeneously embedded manganese(II) oxide nanoparticles. Both Mn-Bpdc and MnO/C nanocomposite materials were characterized by a variety of physicochemical methods. The prepared MnO/C nanocomposite material was deposited on a cathode surface of lithium-sulfur batteries and utilized as a shuttle suppressing layer. This electrode structure immobilizes polysulfides inside the cathode and improves the stability during cycling. The electrode with MnO/C nanocomposite shuttle suppressing layer maintains high stability during cycling in comparison with a standard electrode. The electrode with MnO/C composite layer exhibits 84.8% capacity retention after 50 cycles at different C-rates compared to 76.2% obtained for the standard electrode. |