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Curtailing Carbon Usage with Addition of Functionalized NiFe 2 O 4 Quantum Dots: Toward More Practical S Cathodes for Li–S Cells
Nano-Micro Letters ( IF 31.6 ) Pub Date : 2020-07-11 , DOI: 10.1007/s40820-020-00484-4
Ning Li 1 , Ting Meng 1 , Lai Ma 1 , Han Zhang 1 , JiaJia Yao 2 , Maowen Xu 1 , Chang Ming Li 1 , Jian Jiang 1
Affiliation  

  • Using NiFe2O4 quantum dots (QDs) as additive substitutes, the total carbon content in cathodes is sharply reduced from original ~ 26% (in traditional S/C cathodes) to a low mass ratio of ~ 5%.

  • The as-built S@CB ⊆ QDs demonstrate more appropriate tap density (~1.32 g cm−3) and specific surface area (~19.9 m2 g−1) values than S@CB counterparts.

  • NiFe2O4 QDs additives possess superb chemisorption interactions with Li2Sn molecules and proper charge-transfer/catalytic features to strengthen redox kinetics of overall cathode systems.



中文翻译:

通过增加功能化的NiFe 2 O 4量子点来减少碳的使用:向Li-S电池提供更实用的S阴极

  • 使用NiFe 2 O 4量子点(QDs)作为添加剂替代品,阴极中的总碳含量从原来的〜26%(在传统的S / C阴极中)急剧降低到〜5%的低质量比。

  • 建成后的S @ CB⊆QD比S @ CB对应物显示出更合适的振实密度(〜1.32 g cm -3)和比表面积(〜19.9 m 2 g -1)值。

  • NiFe 2 O 4 QDs添加剂与Li 2 Sn分子具有出色的化学吸附相互作用,并具有适当的电荷转移/催化功能,可增强整个阴极系统的氧化还原动力学。

更新日期:2020-07-13
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