In this work, the synthesis of α-MnS/MnO/S-doped C micro-rod composites via a simple sulfidation process is demonstrated, starting from a Mn-based metal-organic framework. The resulting heterostructured α-MnS/MnO nanoparticles (8±2 nm) are uniformly embedded into the S-doped carbonaceous porous framework with hierarchical micro-/meso-porosity. The combination of structural and compositional characteristics results in the promising electrochemical performance of the as-obtained composites as anode materials for lithium-ion batteries, coupled with high reversible capacity (940 mAh g−1 at 0.1 A g−1), excellent rate capability as well as long cycling lifespan at high rate of 2.0 A g−1 for 2000 cycles with the eventual capacity of ∼300 mAh g−1. Importantly, in situ X-ray diffraction studies clearly reveal mechanistic details of the lithium storage mechanism, involving multistep conversion processes upon initial lithiation. © 2021 The Authors. ChemElectroChem published by Wiley-VCH GmbH

Embedding heterostructured α-MnS/MnO nanoparticles in S-doped carbonaceous porous framework as high-performance anode for lithium-ion batteries / Ma, Y.; Ma, Y.; Diemant, T.; Cao, K.; Kaiser, U.; Behm, R. J.; Varzi, A.; Passerini, S.. - In: CHEMELECTROCHEM. - ISSN 2196-0216. - 8:5(2021), pp. 918-927. [10.1002/celc.202100110]

Embedding heterostructured α-MnS/MnO nanoparticles in S-doped carbonaceous porous framework as high-performance anode for lithium-ion batteries

Passerini, S.
2021

Abstract

In this work, the synthesis of α-MnS/MnO/S-doped C micro-rod composites via a simple sulfidation process is demonstrated, starting from a Mn-based metal-organic framework. The resulting heterostructured α-MnS/MnO nanoparticles (8±2 nm) are uniformly embedded into the S-doped carbonaceous porous framework with hierarchical micro-/meso-porosity. The combination of structural and compositional characteristics results in the promising electrochemical performance of the as-obtained composites as anode materials for lithium-ion batteries, coupled with high reversible capacity (940 mAh g−1 at 0.1 A g−1), excellent rate capability as well as long cycling lifespan at high rate of 2.0 A g−1 for 2000 cycles with the eventual capacity of ∼300 mAh g−1. Importantly, in situ X-ray diffraction studies clearly reveal mechanistic details of the lithium storage mechanism, involving multistep conversion processes upon initial lithiation. © 2021 The Authors. ChemElectroChem published by Wiley-VCH GmbH
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1600478
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