Nano Li4Ti5O12 as sulfur host for high-performance Li-S battery

被引：10

作者：

Zeng, Tianbiao ^{[1
]}

Ji, Penghui ^{[1
]}

Shang, Biao ^{[1
]}

Peng, Qimeng ^{[1
]}

Hu, Xuebu ^{[1
]}

Li, Gang ^{[1
]}

机构：

[1] Chongqing Univ Technol, Coll Chem & Chem Engn, Chongqing 400054, Peoples R China

来源：

IONICS | 2018年 / 24卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Li4Ti5O12; Sulfur host; Li+ conductor; Polysulfide; Electrochemical performance; LITHIUM POLYSULFIDE; CATHODE; HYBRID; TIO2; NANOCOMPOSITES; ELECTROLYTE; INTERLAYER; PHASE; ION; TIN;

D O I：

10.1007/s11581-018-2468-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

S/Li4Ti5O12 cathode with high lithium ionic conductivity was prepared for Li-S battery. Herein, nano Li4Ti5O12 is used as sulfur host and fast Li+ conductor, which can adsorb effectively polysulfides and improve remarkably Li+ diffusion coefficient in sulfur cathode. At 0.5 C, S/Li4Ti5O12 cathode has a stable discharge capacity of 616 mAh g(-1) at the 700th cycle and a capacity loss per cycle of 0.0196% from the second to the 700th cycle, but the corresponding values of S/C cathode are 437 mAh g(-1) and 0.0598%. Even at 2 C, the capacity loss per cycle of S/Li4Ti5O12 cathode is only 0.0273% from the second to the 700th cycle. The results indicate that Li4Ti5O12 as the sulfur host plays a key role on the high performance of Li-S battery due to reducing the shuttle effect and enhancing lithium ionic conductivity.

引用

页码：2973 / 2982

页数：10

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