Tin Intercalated Ultrathin MoO3 Nanoribbons for Advanced Lithium-Sulfur Batteries

被引：135

作者：

Yang, Weiwei ^{[1
]}

Xiao, Jiewen ^{[1
]}

Ma, Yang ^{[1
]}

Cui, Shiqiang ^{[1
]}

Zhang, Peng ^{[1
]}

Zhai, Pengbo ^{[1
]}

Meng, Lingjia ^{[2
]}

Wang, Xingguo ^{[1
]}

Wei, Yi ^{[1
]}

Du, Zhiguo ^{[1
]}

Li, Bixuan ^{[1
]}

Sun, Zhibo ^{[1
]}

Yang, Shubin ^{[1
]}

Zhang, Qianfan ^{[1
]}

Gong, Yongji ^{[1
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

[2] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China

来源：

ADVANCED ENERGY MATERIALS | 2019年 / 9卷 / 07期

基金：

中国国家自然科学基金;

关键词：

2D materials; intercalation; Li-S batteries; MoO3; nanoribbons; INITIO MOLECULAR-DYNAMICS; TOTAL-ENERGY CALCULATIONS; RATIONAL DESIGN; GRAPHENE; TRANSITION; CATHODE; METALS;

D O I：

10.1002/aenm.201803137

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：

Heteroatom doping strategies have been widely developed to engineer the conductivity and polarity of 2D materials to improve their performance as the host for sulfur cathode in lithium-sulfur batteries. However, further improvement is limited by the inhomogeneity and the small amount of the doping atoms. An intercalation method to improve the conductivity and polarity of 2D-layered alpha-MoO3 nanoribbons is developed here, thus, resulting in much improved electrochemical performance as sulfur host with better rate and cycle performance. The first principle calculations show that the binding energy of MoO3 and lithium polysulfides, lithium sulfide and sulfur is significantly improved after Sn intercalation. The Sn0.063MoO3-S cathode delivers an initial specific capacity of 1390.3 mAh g(-1) at 0.1 C with the Coulombic efficiency up to 99.7% and shows 79.6% retention of the initial capacity over 500 cycles at 1 C rate with a capacity decay of 0.04% per cycle. This intercalation method provides a new strategy to engineer the electrochemical properties of 2D materials.

引用

页数：8

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