The sluggish reaction kinetics and severe shutting behaviors of sulfur cathodes are the major roadblocks to realizing the practical application of lithium-sulfur (Li-S) batteries and need to be solved through designing/constructing rational sulfur hosts. Herein, an effective alternative material of Fe₃ O_4- _x /FeP in-situ embedded in N-doped carbon-tube (Fe₃ O_4- _x /FeP/NCT) is proposed. In this fabricated heterostructure, NCT skeleton works as a sulfur host provides physical barrier for lithium polysulfides (LiPSs), while Fe₃ O_4- _x /FeP heterostructure with abundant oxygen vacancies provides double active centers to simultaneously accelerate e^- /Li⁺ diffusion/transport kinetics and catalysis for LiPSs. Through the respective advantages, Fe₃ O_4- _x /FeP/NCT exhibits synergy enhancement effect for restraining sulfur dissolution and enhancing its conversion kinetics. Furthermore, the promoted ion diffusion kinetics, enhanced electrical conductivity, and increased active sites of Fe₃ O_4- _x /FeP/NCT are enabled by oxygen vacancies as well as the heterogeneous interfacial contact, which is clearly confirmed by experimental and first-principles calculations. By virtue of these superiorities, the constructed cathode shows excellent long-term cycling stability and a high-rate capability up to 10 C. Specially, a high areal capacity of 7.2 mAh cm^-2 is also achieved, holding great promise for utilization in advanced Li-S batteries in the future.

#	Concept	H-Index	Publications	Citations
1	Engineering	2	2	161
2	Chemical Engineering	2	2	161
3	Chemistry	2	2	161
4	Materials Science	2	2	161
5	Batteries	2	2	161

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