Abstract
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.
| Original language | English |
|---|---|
| Article number | 1807971 |
| Journal | Advanced Functional Materials |
| Volume | 29 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2019 Feb 28 |
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Keywords
- (SnCo)S
- anodes
- heterostructure
- in situ TEM
- in situ XRD
- sodium-ion batteries
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
Cite this
Heterostructured Nanocube-Shaped Binary Sulfide (SnCo)S 2 Interlaced with S-Doped Graphene as a High-Performance Anode for Advanced Na + Batteries . / Yang, Chenghao; Liang, Xinghui; Ou, Xing; Zhang, Qiaobao; Zheng, Hong Shen; Zheng, Fenghua; Wang, Jeng Han; Huang, Kevin; Liu, Meilin.
In: Advanced Functional Materials, Vol. 29, No. 9, 1807971, 28.02.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Heterostructured Nanocube-Shaped Binary Sulfide (SnCo)S 2 Interlaced with S-Doped Graphene as a High-Performance Anode for Advanced Na + Batteries
AU - Yang, Chenghao
AU - Liang, Xinghui
AU - Ou, Xing
AU - Zhang, Qiaobao
AU - Zheng, Hong Shen
AU - Zheng, Fenghua
AU - Wang, Jeng Han
AU - Huang, Kevin
AU - Liu, Meilin
PY - 2019/2/28
Y1 - 2019/2/28
N2 - 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.
AB - 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.
KW - (SnCo)S
KW - anodes
KW - heterostructure
KW - in situ TEM
KW - in situ XRD
KW - sodium-ion batteries
UR - http://www.scopus.com/inward/record.url?scp=85060156021&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060156021&partnerID=8YFLogxK
U2 - 10.1002/adfm.201807971
DO - 10.1002/adfm.201807971
M3 - Article
AN - SCOPUS:85060156021
VL - 29
JO - Advanced Functional Materials
JF - Advanced Functional Materials
SN - 1616-301X
IS - 9
M1 - 1807971
ER -