Journal Article10.1021/acsnano.2c04702
A High-Rate, Durable Cathode for Sodium-Ion Batteries: Sb-Doped O3-Type Ni/Mn-Based Layered Oxides.
Tao Yuan,Siqing Li,Yuanyuan Sun,Jeng Han Wang,An-Jie Chen,Qinfeng Zheng,Yixiao Zhang,Liwei Chen,Gyu Hyeon Nam,Haiying Che,Junhe Yang,Shiyou Zheng,Mei-Na Liu +12 more
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TL;DR: In this paper , the authors unravelled the mechanism for dramatically enhancing the stability and rate capability of O3-NaNi0.5Mn 0.5-SbxO2 (NaNMS) by substitutional Sb doping, which can alter the coordination environment and chemical bonds of the transition metal ions in the structure, resulting in a more stable structure with wider Na+ transport channels.
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Abstract: O3-Type layered oxides are widely studied as cathodes for sodium-ion batteries (SIBs) due to their high theoretical capacities. However, their rate capability and durability are limited by tortuous Na+ diffusion channels and complicated phase evolution during Na+ extraction/insertion. Here we report our findings in unravelling the mechanism for dramatically enhancing the stability and rate capability of O3-NaNi0.5Mn0.5-xSbxO2 (NaNMS) by substitutional Sb doping, which can alter the coordination environment and chemical bonds of the transition metal (TM) ions in the structure, resulting in a more stable structure with wider Na+ transport channels. Furthermore, NaNMS nanoparticles are obtained by surface energy regulation during grain growth. The synergistic effect of Sb doping and nanostructuring greatly reduces the ionic migration energy barrier while increasing the reversibility of the structural evolution during repeated Na+ extraction/insertion. An optimized NaNMS-1 electrode delivers a reversible capacity of 212.3 mAh g-1 at 0.2 C and 74.5 mAh g-1 at 50 C with minimal capacity loss after 100 cycles at a low temperature of -20 °C. Such electrochemical performance is superior to most of the reported layered oxide cathodes used in rechargeable SIBs.
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Citations
High-entropy P2/O3 biphasic cathode materials for wide-temperature rechargeable sodium-ion batteries
TL;DR: In this paper , a high-entropy biphasic Na0.1 cathode with a P2/O3 ratio of 23:77 (wt%) delivers a high initial coulombic efficiency (ICE) of 97.6%, a considerable discharge capacity of 86.7 mAh g−1 at current density of 800 mA g −1, and respectable capacity retention in a wide temperature range from -40 to 50 °C.
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Unleashing the Potential of Sodium‐Ion Batteries: Current State and Future Directions for Sustainable Energy Storage
Aditya Singh,Mobinul Islam,Abhishek Meena,M. Faizan,Daseul Han,Chinna Bathula,A Hajibabaei,Rohit Anand,Kyung-Wan Nam +8 more
TL;DR: In this paper , the fundamentals, current progress, and views on the future of rechargeable sodium-ion battery (SIB) technologies are discussed, with a discussion focused on the design of novel materials.
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Practical Cathodes for Sodium‐Ion Batteries: Who Will Take The Crown?
TL;DR: This review summarizes research on O3-type sodiated transition-metal oxides for sodium-ion batteries, highlighting challenges and modification strategies to improve their rate capability and cycling stability for commercial applications.
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Recent Progress in the Emerging Modification Strategies for Layered Oxide Cathodes toward Practicable Sodium Ion Batteries
TL;DR: In this paper , a comprehensive overview and summary of recently reported modification strategies for layered transition metal oxides are provided and the structure-function-performance relationship is refined, and a perspective on the outlook and development direction for Na-based LTMOs cathodes is also provided.
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