Superior Lithium Storage Capacity of α‐MnS Nanoparticles Embedded in S‐Doped Carbonaceous Mesoporous Frameworks
| Autor: | Yanjiao Ma, Dorin Geiger, Stefano Passerini, Yuan Ma, Thomas Diemant, Rolf Jürgen Behm, Alberto Varzi, Ute Kaiser, Guk-Tae Kim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Technology
DDC 540 / Chemistry & allied sciences α‐MnS nanoparticles Materials science Lithium-Ionen-Akkumulator chemistry.chemical_element Nanoparticle 02 engineering and technology S‐doped carbonaceous frameworks 010402 general chemistry 01 natural sciences law.invention law General Materials Science FOIL method Renewable Energy Sustainability and the Environment in situ XRD/reaction mechanism Current collector 021001 nanoscience & nanotechnology in situ dilatometry Copper Cathode 0104 chemical sciences Lithium ion batteries chemistry Chemical engineering ddc:540 Electrode Lithium 0210 nano-technology Mesoporous material ddc:600 |
| Zdroj: | Advanced energy materials, 9 (43), Article: 1902077 |
| ISSN: | 1614-6832 1614-6840 |
| DOI: | 10.5445/ir/1000098869 |
| Popis: | Herein, a Mn-based metal–organic framework is used as a precursor to obtain well-defined α-MnS/S-doped C microrod composites. Ultrasmall α-MnS nanoparticles (3–5 nm) uniformly embedded in S-doped carbonaceous mesoporous frameworks (α-MnS/SCMFs) are obtained in a simple sulfidation reaction. As-obtained α-MnS/SCMFs shows outstanding lithium storage performance, with a specific capacity of 1383 mAh g−1 in the 300th cycle or 1500 mAh g−1 in the 120th cycle (at 200 mA g−1) using copper or nickel foil as the current collector, respectively. The significant (pseudo)capacitive contribution and the stable composite structure of the electrodes result in impressive rate capabilities and outstanding long-term cycling stability. Importantly, in situ X-ray diffraction measurements studies on electrodes employing various metal foils/disks as current collector reveal the occurrence of the conversion reaction of CuS at (de)lithiation process when using copper foil as the current collector. This constitutes the first report of the reaction mechanism for α-MnS, eventually forming metallic Mn and Li2S. In situ dilatometry measurements demonstrate that the peculiar structure of α-MnS/SCMFs effectively restrains the electrode volume variation upon repeated (dis)charge processes. Finally, α-MnS/SCMFs electrodes present an impressive performance when coupled in a full cell with commercial LiMn1/3Co1/3Ni1/3O2 cathodes. publishedVersion |
| Databáze: | OpenAIRE |
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