Fe3O4/Fe/FeS Tri-Heterojunction Node Spawning N-Carbon Nanotube Scaffold Structure for High-Performance Sodium-Ion Battery
Yuan Liu , Qing Lin , Xiaocui Chen , Xufeng Meng , Baoxiu Hou , Haiyan Liu , Shuaihua Zhang , Ningzhao Shang , Zheng Wang , Chaoyue Zhang , Jianjun Song , Xiaoxian Zhao
Energy & Environmental Materials ›› 2024, Vol. 7 ›› Issue (4) : e12684
Fe3O4/Fe/FeS Tri-Heterojunction Node Spawning N-Carbon Nanotube Scaffold Structure for High-Performance Sodium-Ion Battery
The Fe-based anode of sodium-ion batteries attracts much attention due to the abundant source, low-cost, and high specific capacity. However, the low electron and ion transfer rate, poor structural stability, and shuttle effect of NaS2 intermediate restrain its further development. Herein, the Fe3O4/Fe/FeS tri-heterojunction node spawned N-carbon nanotube scaffold structure (FHNCS) was designed using the modified MIL-88B(Fe) as a template followed by catalytic growth and sulfidation process. During catalytic growth process, the reduced Fe monomers catalyze the growth of N-doped carbon nanotubes to connect the Fe3O4/Fe/FeS tri-heterojunction node, forming a 3D scaffold structure. Wherein the N-doped carbon promotes the transfer of electrons between Fe3O4/Fe/FeS particles, and the tri-heterojunction facilitates the diffusion of electrons at the interface, to organize a 3D conductive network. The unique scaffold structure provides more active sites and shortens the Na+ diffusion path. Meanwhile, the structure exhibits excellent mechanical stability to alleviate the volume expansion during circulation. Furthermore, the Fe in Fe3O4/Fe heterojunction can adjust the d-band center of Fe in Fe3O4 to enhance the adsorption between Fe3O4 and Na2S intermediate, which restrains the shuttle effect. Therefore, the FHNCS demonstrates a high specific capacity of 436 mAh g-1 at 0.5 A g-1, 84.7% and 73.4% of the initial capacities are maintained after 100 cycles at 0.5 A g-1 and 1000 cycles at 1.0 A g-1. We believe that this strategy gives an inspiration for constructing Fe-based anode with excellent rate capability and cycling stability.
anode / core-shell / heterojunction / hollow structure / sodium ion batteries
| [1] |
|
| [2] |
|
| [3] |
|
| [4] |
|
| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
| [15] |
|
| [16] |
|
| [17] |
|
| [18] |
|
| [19] |
|
| [20] |
|
| [21] |
|
| [22] |
|
| [23] |
|
| [24] |
|
| [25] |
|
| [26] |
|
| [27] |
|
| [28] |
|
| [29] |
|
| [30] |
|
| [31] |
|
| [32] |
|
| [33] |
|
| [34] |
|
| [35] |
|
| [36] |
|
| [37] |
|
| [38] |
|
| [39] |
|
| [40] |
|
| [41] |
|
| [42] |
|
| [43] |
|
| [44] |
|
| [45] |
|
| [46] |
|
| [47] |
|
| [48] |
|
| [49] |
|
| [50] |
|
| [51] |
|
| [52] |
|
| [53] |
|
| [54] |
|
| [55] |
|
| [56] |
|
| [57] |
|
| [58] |
|
| [59] |
|
| [60] |
|
| [61] |
|
| [62] |
|
| [63] |
|
2023 The Authors. Energy & Environmental Materials published by John Wiley & Sons Australia, Ltd on behalf of Zhengzhou University.
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