Abstract
Effective design of nanoheterostructure anode with high ion/electron migration kinetics can give electrode with superior electrochemical performance.However,the design and preparation of nanoheterostruc-ture composites with high-capacity and long cycling life in half and pouch full cells remain a big chal-lenge.Here,a novel micro-pore MnS/Mn2SnS4 heterostructure nanowire were in situ encapsulated into the N and S elements co-doped amorphous carbon tubes(abbreviated as(MnS/Mn2SnS4)@N,S-ACTs)and showed superior energy storage properties in Na-/Li-ion half cells and pouch full cells.The Na-/Li-storage capabilities improvement are attribute to the strong synergistic effect between MnS/Mn2SnS4 heterostruc-ture and N,S-ACTs protective layer,the former induces an local built-in electric field between Mn2SnS4 and MnS during charging/discharging,accelerating interfacial ion/electron diffusion dynamics,the latter effective maintains the morphology and volume evolution during Na+/Li+charging/discharging,achieving a long-term cycling stability(e.g.,high discharge capacity of 79.2 mAh/g with the capacity retention of 79.3％can be gained after 2200 cycles at 3 C in(MnS/Mn2SnS4)@N,S-ACTs//LiFePO4 pouch full cells;a high capacity of～34 mAh/g at 10 C can be got with a Coulombic efficiency of 100％after 1000 cycles in pouch(MnS/Mn2SnS4)@N,S-ACTs//Na3V2(PO4)2O2F full cells.
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