Unveiling Na-ion storage mechanism and interface property of layered perovskite Bi2TiO4F2@rGO anode in ether-based electrolyte
Miao Yan , Qi Fang , Rui Ding , Yi Li , Jian Guo , Jinmei Xie , Yuzhen Zhang , Yuming He , Ziyang Yan , Zhiqiang Chen , Xiujuan Sun , Enhui Liu
Carbon Neutralization ›› 2024, Vol. 3 ›› Issue (5) : 818 -831.
Unveiling Na-ion storage mechanism and interface property of layered perovskite Bi2TiO4F2@rGO anode in ether-based electrolyte
To unveil the charge storage mechanisms and interface properties of electrode materials is very challenging for Na-ion storage. In this work, we report that the novel layered perovskite Bi2TiO4F2@reduced graphene oxides (BTOF@r-GO) serves as a promising anode for Na-ion storage in an ether-based electrolyte, which exhibits much better electrochemical performance than in an ester-based electrolyte. Interestingly, BTOF@rGO possesses a prominent specific capacity of 458.3–102 mAh g–1/0.02–1 Ag–1 and a high initial coulombic efficiency (ICE) of 70.3%. Cross-sectional morphology and depth profile surface chemistry indicate not only a denser reactive interfacial layer but also a superior solid electrolyte interface film containing a higher proportion of inorganic components, which accelerates Na+ migration and is an essential factor for the improvement of ICE and other electrochemical properties. Electrochemical tests and ex situ measurements demonstrate the triple hybridization Na-ion storage mechanism of conversion, alloying, and intercalation for BTOF@rGO in the ether-based electrolyte. Furthermore, the Na-ion batteries assembled with the BTOF@rGO anode and the commercial Na3V2(PO4)2F3@C cathode exhibit remarkable energy densities and power densities. Overall, the work shows deep insights on developing advanced electrode materials for efficient Na-ion storage.
anodes / charge storage mechanisms / electrode–electrolyte interfaces / layered perovskites / 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] |
|
2024 The Author(s). Carbon Neutralization published by Wenzhou University and John Wiley & Sons Australia, Ltd.
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