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Pearl-structure-enhanced NASICON cathode toward ultrastable sodium-ion batteries
Citation
Zhao, X.-X., Fu, W., Zhang, H.-X., Guo, J.-Z., Gu, Z.-Y., Wang, X.-T., Yang, J.-L., Lü, H.-Y., Wu, X.-L., & Ang, E. H. (2023). Pearl-structure-enhanced NASICON cathode toward ultrastable sodium-ion batteries. Advanced Science. Advance online publication. https://doi.org/10.1002/advs.202301308
Author
Zhao, Xin-Xin
•
Fu, Wangqin
•
Zhang, Hong-Xia
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Guo, Jin-Zhi
•
Gu, Zhen-Yi
•
Wang, Xiao-Tong
•
Yang, Jia-Lin
•
Lu, Hong-Yan
•
Wu, Xing-Long
•
Abstract
Based on the favorable ionic conductivity and structural stability, sodium superionic conductor (NASICON) materials especially utilizing multivalent redox reaction of vanadium are one of the most promising cathodes in sodium-ion batteries (SIBs). To further boost their application in large-scale energy storage production, a rational strategy is to tailor vanadium with earth-abundant and cheap elements (such as Fe, Mn), reducing the cost and toxicity of vanadium-based NASICON materials. Here, the Na3.05V1.03Fe0.97(PO4)3 (NVFP) is synthesized with highly conductive Ketjen Black (KB) by ball-milling assisted sol-gel method. The pearl-like KB branch chains encircle the NVFP (p-NVFP), the segregated particles possess promoted overall conductivity, balanced charge, and modulated crystal structure during electrochemical progress. The p-NVFP obtains significantly enhanced ion diffusion ability and low volume change (2.99%). Meanwhile, it delivers a durable cycling performance (87.7% capacity retention over 5000 cycles at 5 C) in half cells. Surprisingly, the full cells of p-NVFP reveal a remarkable capability of 84.9 mAh g−1 at 20 C with good cycling performance (capacity decay rate is 0.016% per cycle at 2 C). The structure modulation of the p-NVFP provides a rational design on the superiority of others to be put into practice.
Date Issued
2023
Publisher
Wiley
Journal
Advanced Science
DOI
10.1002/advs.202301308
Project
RI 1/21 EAH
Grant ID
52102213
52173246
20230101128JC
B13013
NIE-SUG4/20AHX
Funding Agency
National Natural Science Foundation of China
Natural Science Foundation of Jilin Province
111 Project
National Institute of Education, Singapore