TY - JOUR
T1 - Heterostructured Mn3O4-MnS Multi-Shelled Hollow Spheres for Enhanced Polysulfide Regulation in Lithium-Sulfur Batteries
AU - Qin, Bin
AU - Wang, Qun
AU - Yao, Weiqi
AU - Cai, Yifei
AU - Chen, Yuhan
AU - Wang, Pengcheng
AU - Zou, Yongchun
AU - Zheng, Xiaohang
AU - Cao, Jian
AU - Qi, Junlei
AU - Cai, Wei
PY - 2023/11
Y1 - 2023/11
N2 - Constructing heterojunctions and hollow multi-shelled structures can render materials with fascinating physicochemical properties, and have been regarded as two promising strategies to overcome the severe shuttling and sluggish kinetics of polysulfide in lithium-sulfur (Li-S) batteries. However, a single strategy can only take limited effect. Modulating catalytic hosts with synergistic effects are urgently desired. Herein, Mn3O4-MnS heterogeneous multi-shelled hollow spheres are meticulously designed by controlled sulfuration of Mn2O3 hollow spheres, and then applied as advanced encapsulation hosts for Li-S batteries. Benefiting from the separated spatial confinement by hollow multi-shelled structure, ample exposed active sites and built-in electric field by heterogeneous interface, and synergistic effects between Mn3O4 (strong adsorption) and MnS (fast conversion) components, the assembled battery achieves prominent rate capability and decent cyclability (0.016% decay per cycle at 2 C, 1000 cycles). More crucially, satisfactory areal capacity reaches up to 7.1 mAh cm-2 even with high sulfur loading (8.0 mg cm-2) and lean electrolyte (E/S = 4.0 μL mg-1) conditions. This work will provide inspiration for the rational design of hollow multi-shelled heterostructure for various electrocatalysis applications.
AB - Constructing heterojunctions and hollow multi-shelled structures can render materials with fascinating physicochemical properties, and have been regarded as two promising strategies to overcome the severe shuttling and sluggish kinetics of polysulfide in lithium-sulfur (Li-S) batteries. However, a single strategy can only take limited effect. Modulating catalytic hosts with synergistic effects are urgently desired. Herein, Mn3O4-MnS heterogeneous multi-shelled hollow spheres are meticulously designed by controlled sulfuration of Mn2O3 hollow spheres, and then applied as advanced encapsulation hosts for Li-S batteries. Benefiting from the separated spatial confinement by hollow multi-shelled structure, ample exposed active sites and built-in electric field by heterogeneous interface, and synergistic effects between Mn3O4 (strong adsorption) and MnS (fast conversion) components, the assembled battery achieves prominent rate capability and decent cyclability (0.016% decay per cycle at 2 C, 1000 cycles). More crucially, satisfactory areal capacity reaches up to 7.1 mAh cm-2 even with high sulfur loading (8.0 mg cm-2) and lean electrolyte (E/S = 4.0 μL mg-1) conditions. This work will provide inspiration for the rational design of hollow multi-shelled heterostructure for various electrocatalysis applications.
KW - electrocatalyst
KW - heterojunction host
KW - hollow multi-shelled structure
KW - Li-S battery
KW - Mn3O4-MnS
KW - CONVERSION
UR - http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000905252300001
U2 - 10.1002/eem2.12475
DO - 10.1002/eem2.12475
M3 - RGC 21 - Publication in refereed journal
SN - 2575-0348
VL - 6
JO - Energy & Environmental Materials
JF - Energy & Environmental Materials
IS - 6
M1 - e12475
ER -