Heterostructured Nanocube-Shaped Binary Sulfide (SnCo)S 2 Interlaced with S-Doped Graphene as a High-Performance Anode for Advanced Na + Batteries

Chenghao Yang, Xinghui Liang, Xing Ou*, Qiaobao Zhang, Hong Shen Zheng, Fenghua Zheng, Jeng Han Wang, Kevin Huang, Meilin Liu

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

142 引文 斯高帕斯(Scopus)

摘要

Heterostructuring electrodes with multiple electroactive and inactive supporting components to simultaneously satisfy electrochemical and structural requirements has recently been identified as a viable pathway to achieve high-capacity and durable sodium-ion batteries (SIBs). Here, a new design of heterostructured SIB anode is reported consisting of double metal-sulfide (SnCo)S 2 nanocubes interlaced with 2D sulfur-doped graphene (SG) nanosheets. The heterostructured (SnCo)S 2 /SG nanocubes exhibit an excellent rate capability (469 mAh g −1 at 10.0 A g −1 ) and durability (5000 cycles, 487 mAh g −1 at 5.0 A g −1 , 92.6% capacity retention). In situ X-ray diffraction reveals that the (SnCo)S 2 /SG anode undergoes a six-stage Na + storage mechanism of combined intercalation, conversion, and alloying reactions. The first-principle density functional theory calculations suggest high concentration of p–n heterojunctions at SnS 2 /CoS 2 interfaces responsible for the high rate performance, while in situ transmission electron microscopy unveils that the interlacing and elastic SG nanosheets play a key role in extending the cycle life.

原文英語
文章編號1807971
期刊Advanced Functional Materials
29
發行號9
DOIs
出版狀態已發佈 - 2019 2月 28

ASJC Scopus subject areas

  • 化學 (全部)
  • 材料科學(全部)
  • 凝聚態物理學

指紋

深入研究「Heterostructured Nanocube-Shaped Binary Sulfide (SnCo)S 2 Interlaced with S-Doped Graphene as a High-Performance Anode for Advanced Na + Batteries」主題。共同形成了獨特的指紋。

引用此