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Embedding Heterostructured α‐MnS/MnO Nanoparticles in S‐Doped Carbonaceous Porous Framework as High‐Performance Anode for Lithium‐Ion Batteries
Author(s) -
Ma Yuan,
Ma Yanjiao,
Diemant Thomas,
Cao Kecheng,
Kaiser Ute,
Behm R. Jürgen,
Varzi Alberto,
Passerini Stefano
Publication year - 2021
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202100110
Subject(s) - anode , sulfidation , materials science , lithium (medication) , porosity , nanoparticle , electrochemistry , chemical engineering , doping , nanotechnology , ion , electrode , composite material , chemistry , metallurgy , sulfur , optoelectronics , organic chemistry , medicine , engineering , endocrinology
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.