Three-Dimensional Hierarchical MoSe2/N, F Co-Doped Carbon Heterostructure Assembled by Ultrathin Nanosheets for Advanced Lithium-Ion Batteries,ACS Sustainable Chemistry & Engineering

当前位置： X-MOL 学术 › ACS Sustain. Chem. Eng. › 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.)

Three-Dimensional Hierarchical MoSe2/N, F Co-Doped Carbon Heterostructure Assembled by Ultrathin Nanosheets for Advanced Lithium-Ion Batteries
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-08-28 , DOI: 10.1021/acssuschemeng.0c04719
Qinqin Liang _{1,

2} , Lixuan Zhang _{1,

2} , Man Zhang _{1,

2} , Qichang Pan _{1,

2,

3} , Yu Li _{1,

2} , Chunlei Tan _{1,

2} , Fenghua Zheng _{1,

2,

3} , Youguo Huang _{1,

2,

3} , Hongqiang Wang _{1,

2,

3} , Qingyu Li _{1,

2,

3}

Affiliation

MoSe₂ has attracted great interest as an anode material for lithium-ion batteries (LIBs) thanks to its high capacity. Nevertheless, the poor cycle performance caused by the huge volume change during the lithiation/delithiation process seriously limits its practical application in LIBs. Herein, a 3D hierarchical MoSe₂/N, F co-doped carbon (MoSe₂/NFC) heterostructure is prepared via a simple method. Notably, the N, F co-doped heterostructure can expand the (002) plane of MoSe₂, which contributes in facilitating Li⁺ insertion/extraction. Furthermore, N, F co-doped carbon confined MoSe₂ nanosheets to form a 3D hierarchical heterostructure, leading to fast electron/ion transfer, buffering of the volume change, and prevention of the aggregation of MoSe₂ nanosheets during the repeated discharge/charge process. Therefore, the MoSe₂/NFC composite exhibits good rate performance and ultra-long cycling life when applied in LIBs. A high capacity of 452.9 mAh g^–1 is maintained at 5 A g^–1, and a high capacity of 598.3 mAh g^–1 is obtained after 1000 cycles at 2 A g^–1.

中文翻译：

超薄纳米片组装用于高级锂离子电池的三维分层MoSe ₂ / N，F共掺杂碳异质结构

MoSe ₂由于其高容量而作为锂离子电池（LIB）的负极材料引起了极大的兴趣。然而，由于在锂化/脱锂过程中体积的巨大变化而导致的不良循环性能严重限制了其在LIB中的实际应用。在此，通过简单的方法制备了3D分层的MoSe ₂ / N，F共掺杂碳（MoSe ₂ / NFC）异质结构。值得注意的是，N，F共掺杂的异质结构可以扩展MoSe ₂的（002）平面，这有助于促进Li ^+的插入/提取。此外，N，F共掺杂的碳约束的MoSe ₂纳米片形成3D分层异质结构，从而导致快速的电子/离子转移，体积变化的缓冲以及在重复的放电/充电过程中防止MoSe ₂纳米片的聚集。因此，MoSe ₂ / NFC复合材料应用于LIB时，具有良好的速率性能和超长的循环寿命。在5 A g ^–1下保持452.9 mAh g ^–1的高容量，在2 A g ^–1下经过1000次循环后获得598.3 mAh g ^–1的高容量。

更新日期：2020-09-21

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11