Carbon coated bimetallic sulfide nanodots/carbon nanorod heterostructure enabling long-life lithium-ion batteries†,Journal of Materials Chemistry A

当前位置： X-MOL 学术 › J. Mater. Chem. A › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Carbon coated bimetallic sulfide nanodots/carbon nanorod heterostructure enabling long-life lithium-ion batteries†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-11-23 00:00:00 , DOI: 10.1039/c7ta06849b
Xuejie Gao _{1,

2,

3,

4,

5} , Jiwei Wang _{6,

7,

8,

9} , Duo Zhang _{4,

5,

10,

11} , Keegan Adair _{6,

7,

8,

9} , Kun Feng _{1,

2,

3,

4,

5} , Na Sun _{1,

2,

3,

4,

5} , Hechuang Zheng _{1,

2,

3,

4,

5} , Huiyun Shao _{1,

2,

3,

4,

5} , Jun Zhong _{1,

2,

3,

4,

5} , Yanyun Ma _{1,

2,

3,

4,

5} , Xueliang (Andy) Sun _{6,

7,

8,

9} , Xuhui Sun _{1,

2,

3,

4,

5}

Affiliation

Exploitation of high capacity and long-life anode materials is essential for the development of lithium-ion batteries (LIBs) with high energy density. Metal sulfides have shown great potential as anode materials for LIBs due to their high theoretical specific capacity and excellent electronic properties and therefore they are considered as excellent candidates for anode materials. However, structural degradation during cycling and polysulfide dissolution has limited their practical application. In this work, we design a unique 0D/1D heterostructure of carbon coated iron–nickel sulfide nanodots/carbon nanorod through simultaneous decomposition and sulfidation of a bi-metal organic framework template. The resultant nanodots/nanorod heterostructure allows for fast ion/electron transport kinetics, suppresses polysulfide dissolution and ensures structural integrity during the lithiation/delithiation process. Consequently, this carbon coated iron–nickel sulfide nanodots/carbon nanorod structure exhibits a high specific capacity (851.3 mA h g⁻¹ at 0.5C after 200 cycles) and an excellent cycling stability (484.7 mA h g⁻¹ after 1000 cycles at a high rate of 4C).

中文翻译：

碳涂层双金属硫化物纳米点/碳纳米棒异质结构可实现长寿命锂离子电池†

开发高容量和长寿命的负极材料对于开发高能量密度的锂离子电池（LIB）至关重要。金属硫化物由于其高的理论比容量和优异的电子性能而已显示出作为LIB阳极材料的巨大潜力，因此被认为是阳极材料的极佳候选材料。但是，循环过程中的结构降解和多硫化物的溶解限制了它们的实际应用。在这项工作中，我们通过同时分解和硫化双金属有机骨架模板，设计了碳包覆的铁-硫化镍纳米点/碳纳米棒的独特0D / 1D异质结构。所产生的纳米点/纳诺德异质结构可实现快速的离子/电子传输动力学，抑制多硫化物溶解并确保在锂化/脱锂过程中的结构完整性。因此，这种碳涂层的铁-硫化镍纳米点/碳纳米棒结构表现出高的比容量（851.3 mA汞柱）200个循环后在0.5C时为^-1）和出色的循环稳定性（1000个循环后在4C的高速率下为484.7 mA hg^-1）。

更新日期：2017-11-23

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南