N,S co-doped carbon confined MnO/MnS heterostructures derived from a one-step pyrolysis of Mn-methionine frameworks for advanced lithium storage

Highlights: • MnO/MnS@N,S co-doped carbon is fabricated from a one-step pyrolysis of MOFs. • Temperature is the key factor to the composition and structure of this hybrid. • The unique hybrid shows attractive lithium storage performance. -- Abstract: Although metal oxide/sulfide heterostructures embedded in carbon matrix have attracted great interest as anode materials for lithium-ion batteries, the facile construction of them is always a challenge task. Herein, an efficient synthetic strategy to fabricate N,S co-doped carbon confined MnO/MnS heterostructures is developed, in which a one-step pyrolysis of Mn-methionine frameworks is employed. Ultrafine MnO/MnS heterostructures are embedded in N,S co-doped carbon, ensuring the abundant active sites, fast electron/ion transfer, good structural stability and considerable capacitive contribution during charge/discharge processes. As a result, the obtained hybrid displays attractive electrochemical properties when employed as an anode material for lithium-ion batteries, such as high reversible charge/discharge capacities of 574/577 mAh g⁻¹ at 0.5 A g⁻¹, good cycling stability and excellent rate capability. This work may provide a facile way for constructing well-defined oxide/sulfide heterostructures with carbon matrix for high-performance lithium storage.