Dandelion-shaped manganese sulfide in ether-based electrolyte for enhanced performance sodium-ion batteries

被引:46
作者
Duong Tung Pham [1 ]
Sambandam, Balaji [1 ]
Kim, Sungjin [1 ]
Jo, Jeonggeun [1 ]
Kim, Seokhun [1 ]
Park, Sohyun [1 ]
Mathew, Vinod [1 ]
Sun, Yang-Kook [2 ]
Kim, Kwangho [3 ,4 ]
Kim, Jaekook [1 ]
机构
[1] Chonnam Natl Univ, Dept Mat Sci & Engn, Gwangju 500757, South Korea
[2] Hanyang Univ, Dept Energy Engn, Seoul 133791, South Korea
[3] Pusan Natl Univ, Global Frontier Ctr Hybrid Interface Mat, Busan 609735, South Korea
[4] Pusan Natl Univ, Sch Mat Sci & Engn, Busan 609735, South Korea
来源
COMMUNICATIONS CHEMISTRY | 2018年 / 1卷
基金
新加坡国家研究基金会;
关键词
REDUCED GRAPHENE OXIDE; ELECTROCHEMICAL PROPERTIES; ANODE MATERIALS; ENERGY-STORAGE; CATHODE MATERIAL; RATE CAPABILITY; MNS; LI; INTERCALATION; MICROSPHERES;
D O I
10.1038/s42004-018-0084-1
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Metal sulfide materials serve as environment-friendly, sustainable, and effective electrode materials for green-energy storage systems. However, their capacity-fading issues related to low electrical conductivity and drastic volume changes during electrochemical cycling have generally limited their application to sodium ion batteries. Here we show that with the combination of an ether-based NaPF6/diglyme electrolyte, the dandelion-shaped manganese sulfide electrode displays enhanced reversible capacity, cycle life, and rate capability. The capacity of 340 mAh g(-1) is maintained over more than 1000 cycles at a current density of 5.0 A g(-1). Furthermore, discharge capacities of 277 and 230 mAh g(-1) at 10 and 20 A g(-1) current densities, respectively, are obtained. Our work demonstrates the formation of a protective solid electrolyte interface layer along the surface of the primary seed particle that limits polysulfide dissolution and hence the preservation of the active material during reaction with sodium.
引用
收藏
页数:14
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