期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 8, 期 31, 页码 11783-11794出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c03936
关键词
lithium-ion battery; sodium-ion battery; carbon-coated Fe7S8; natural material; microstructured
资金
- National 111 Project [B14034]
- National Key R&D Program of China [2018YFC1901901]
- Collaborative Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources, Found of State Key Laboratory of Mineral Processing [BGRIMM-KJSKL-2017-13]
- Science Research Initiation Fund of Central South University [202045012]
- Fundamental Research Funds for the Central Universities of Central South University
From the perspective of resource reserves, environmental effects, and production costs, direct utilization of natural ores as electrode materials for rechargeable batteries after mineral processing is of more practical significance than chemosynthetic materials. While the corresponding investigation is relatively insufficient, herein phenolic resin (PR)-coated natural pyrite composite (FeS2@PR) is successfully fabricated using natural pyrite and oligomeric phenolic resin as starting materials. Subsequent oligomer polymerization and calcination process convert FeS2@C into sulfur-doped carbon-coated Fe7S8(FS@C). Benefiting from the good electric and ionic conductivity of Fe7S8, abundant sulfur active sites, and porosity on carbon shell and effective carbon buffering, FS@C exhibits impressive electro- chemical performance as anodes for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). It delivers high reversible capacities of 1319 and 796 mAh g(-1) after 100 cycles at 0.1 A g(-1) for LIBs and SIBs, respectively. Even at a high current density of 2.0 A g(-1), considerable capacities of 771 mAh g(-1) after 1000 cycles and 545 mAh g(-1) after 400 cycles are retained for LIBs and SIBs. This work provides a promising prospect toward scalable production of high-capacity iron sulfide anode for lithium-ion and sodiumion batteries.
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