Self-Formed Electronic/Ionic Conductive Fe3S4 (R) S (R) 0.9Na3SbS4.0.1NaI Composite for High-Performance Room-Temperature All-Solid-State Sodium-Sulfur Battery

被引：48

作者：

Wan, Hongli ^{[1
,2
]}

Cai, Liangting ^{[1
]}

Yao, Yu ^{[3
]}

Weng, Wei ^{[1
,2
]}

Feng, Yuezhan ^{[4
]}

Mwizerwa, Jean Pierre ^{[1
,2
]}

Liu, Gaozhan ^{[1
,2
]}

Yu, Yan ^{[3
,5
]}

Yao, Xiayin ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

[3] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei Natl Lab Phys Sci Microscale, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China

[4] Zhengzhou Univ, Key Lab Mat Proc & Mold Zhengzhou Univ, Minist Educ, Zhengzhou 450002, Peoples R China

[5] Chinese Acad Sci, Dalian Natl Lab Clean Energy DNL, 457 Zhongshan Rd, Dalian 116023, Liaoning, Peoples R China

来源：

SMALL | 2020年 / 16卷 / 34期

基金：

中国国家自然科学基金;

关键词：

all-solid-state battery; Fe3S4 (R) S (R) 0; 9Na(3)SbS(4).0; 1NaI cathode; self-formed; sodium-sulfur batteries; CARBON;

D O I：

10.1002/smll.202001574

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Fe3S4 (R) S (R) 0.9Na(3)SbS(4).0.1NaI composite cathode is prepared through one-step wet-mechanochemical milling procedure. During milling process, ionic conduction pathway is self-formed in the composite due to the formation of 0.9Na(3)SbS(4).0.1NaI electrolyte without further annealing treatment. Meanwhile, the introduction of Fe(3)S(4)can increase the electronic conductivity of the composite cathode by one order of magnitude and nearly double enhance the ionic conductivities. Besides, the aggregation of sulfur is effectively suppressed in the obtained Fe3S4 (R) S (R) 0.9Na(3)SbS(4).0.1NaI composite, which will enhance the contact between sulfur and 0.9Na(3)SbS(4).0.1NaI electrolyte, leading to a decreased interfacial resistance and improving the electrochemical kinetics of sulfur. Therefore, the resultant all-solid-state sodium-sulfur battery employing Fe3S4 (R) S (R) 0.9Na(3)SbS(4).0.1NaI composite cathode shows discharge capacity of 808.7 mAh g(-1)based on Fe3S4(R)S and a normalized discharge capacity of 1040.5 mAh g(-1)for element S at 100 mA g(-1)for 30 cycles at room temperature. Moreover, the battery also exhibits excellent cycling stability with a reversible capacity of 410 mAh g(-1)at 500 mA g(-1)for 50 cycles, and superior rate capability with capacities of 952.4, 796.7, 513.7, and 445.6 mAh g(-1)at 50, 100, 200, and 500 mA g(-1), respectively. This facile strategy for sulfur-based composite cathode is attractive for achieving room-temperature sodium-sulfur batteries with superior electrochemical performance.

引用

页数：9