Design of Cobalt-Free Ni-Rich Cathodes for High-Performance Sodium-Ion Batteries Using Electrochemical Li + /Na + Exchange

Yao Lv, Liqiu Shi, Jianfeng Yu and Shifei Huang ()
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Yao Lv: Nanxun Innovation Institute, College of Mechanical Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
Liqiu Shi: Nanxun Innovation Institute, College of Mechanical Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
Jianfeng Yu: Nanxun Innovation Institute, College of Mechanical Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
Shifei Huang: Institute of Technology for Carbon Neutralization, School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China

Energies, 2025, vol. 18, issue 12, 1-11

Abstract: Sodium-ion batteries are renowned for their abundant reserves, cost-efficiency, safety, and eco-friendliness and are prime candidates for large-scale energy storage applications. The development of cathode materials plays a crucial role in shaping both the commercialization path and the ultimate performance capabilities of SIBs. To overcome the intricate synthesis challenges associated with pure-phase sodium-ion cathode materials, this study introduces an innovative and streamlined electrochemical Li + /Na + exchange process, successfully fabricating a high-capacity Ni-rich cathode material. This cathode material boasts a remarkable reversible capacity of 180 mAh g −1 at 0.1 C and retains a high-rate capacity of 115 mAh g −1 even at 5 C. Additionally, it exhibits exceptional cycling stability, retaining about 85% of its capacity at 1 C after 50 cycles and still maintaining a capacity greater than 60% after 100 cycles. The Na-NMA85 full cell preserves a discharge capacity of 110 mAh g −1 after 100 cycles, with a capacity retention rate of 80%. This research underscores innovative strategies for designing ion-intercalation-based cathode materials that enhance battery performance, providing fresh perspectives for advancing high-performance battery technologies.

Keywords: sodium-ion batteries; Li+/Na + exchange process; Ni-rich cathode material; high performance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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