Journal
CHEMICAL ENGINEERING JOURNAL
Volume 314, Issue -, Pages 19-26Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.12.123
Keywords
Porous carbon; Metal sulfide; Nanoparticle Lithium-ion battery
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Funding
- Fundamental Research Funds for the Central Universities
- National Natural Science Foundation of China [21273022, 51272030, 21573023, 51572031]
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Many metal sulfides with high theoretical capacities are potential anode materials for lithium-ion batteries. However, the low electronic conductivity and large volume change of metal sulfides during cycling seriously hamper their practical applications. Herein, we report a novel and scalable strategy to synthesize well-dispersed Ni3S2 (similar to 5 nm) inside porous carbon (CMK-3) by using mesoporous silica (SBA -15) as the template. CMK-3 offers not only good electronic conductivity but also mesopores to accommodate the volume variation of Ni3S2, leading to outstanding electrochemical performance of Ni3S2-loaded CMK-3. To show the versatility of this novel method, ZnS-loaded CMK-3 is also prepared. However, most ZnS nanoparticles are formed outside the pores of CMK-3 with regard to high loading amount. It is inferred that the intermediate product Zn would melt and migrate to the outer surface of CMK-3 prior to the formation of ZnS. This novel synthesis method may offer an attractive pathway to metal sulfide loaded porous carbon with high lithium storage capacity.
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