Layered Cathode with Ultralow Strain Empowers Rapid-Charging and Slow-Discharging Capability in Sodium Ion Battery

Yang, Maolin1; Chen, Ziwei1; Huang, Zhongyuan1; Wang, Rui2; Ji, Wenhai3; Zhou, Dong4; Zeng, Tao1; Li, Yongsheng1; Wang, Jun5; Wang, Liguang6; Yang, Tingting1,7; Xiao, Yinguo1

2024-06-01

10.1002/advs.202404701

ADVANCED SCIENCE   影响因子和分区

2198-3844

["The development of the electric vehicle industry has spurred demand for secondary batteries capable of rapid-charging and slow-discharging. Among them, sodium-ion batteries (SIBs) with layered oxide as the cathode exhibit competitive advantages due to their comprehensive electrochemical performance. However, to meet the requirements of rapid-charging and slow-discharging scenarios, it is necessary to further enhance the rate performance of the cathode material to achieve symmetrical capacity at different rates. Simultaneously, minimizing lattice strain during asymmetric electrochemical processes is also significant in alleviating strain accumulation. In this study, the ordered distribution of transition metal layers and the diffusion pathway of sodium ions are optimized through targeted K-doping of sodium layers, leading to a reduction of the diffusion barrier and endowment of prominent rate performance. At a 20C rate, the capacity of the cathode can reach 94% of that at a 0.1C rate. Additionally, the rivet effect of the sodium layers resulted in a global volume strain of only 0.03% for the modified cathode during charging at a 10C rate and discharging at a 1C rate. In summary, high-performance SIBs, with promising prospects for rapid-charging and slow-discharging capability, are obtained through the regulation of sodium layers, opening up new avenues for commercial applications.","This study designs a K+ anchored P2-type sodium-ion cathode Na0.62K0.05Ni0.33Mn0.67O2. The introduction of K+ disrupts the ordered arrangement of transition metal layers and optimizes the Na+ diffusion pathways, significantly enhancing its rate performance. Consequently, symmetric capacity delivery and ultralow structural strain are achieved under various symmetric and asymmetric charge-discharge rates, endowing the cathode with reversible rapid-charging and slow-discharging capability. image"]

layered cathode rapid-charging and slow-discharging capability ultralow strain

SCI ; EI

英语

其他

National Key R&D Program of China[2020YFA0406203] ; National Natural Science Foundation of China[52072008] ; Guangdong Basic and Applied Basic Research Foundation["2022B1515120070","2022A1515110816"] ; Large Scientific Facility Open Subject of Songshan Lake, Dongguan, Guangdong[KFKT2022A04]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001257215300001

WILEY

Web of Science

1.Peking Univ, Sch Adv Mat, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China
2.Univ Cambridge, Dept Engn, Cambridge CB3 0FS, England
3.Spallat Neutron Source Sci Ctr, Dongguan 523803, Peoples R China
4.Sun Yat Sen Univ, Sch Adv Energy, Shenzhen Campus, Shenzhen 518107, Peoples R China
5.Southern Univ Sci & Technol, Sch Innovat & Entrepreneurship, Shenzhen 518055, Peoples R China
6.Zhejiang Univ, Coll Chem & Biol Engn, Hangzhou 310000, Peoples R China
7.Forschungszentrum Julich, Ernst Ruska Ctr Microscopy & Spect Electrons, D-52428 Julich, Germany

Yang, Maolin,Chen, Ziwei,Huang, Zhongyuan,et al. Layered Cathode with Ultralow Strain Empowers Rapid-Charging and Slow-Discharging Capability in Sodium Ion Battery[J]. ADVANCED SCIENCE,2024.

Yang, Maolin.,Chen, Ziwei.,Huang, Zhongyuan.,Wang, Rui.,Ji, Wenhai.,...&Xiao, Yinguo.(2024).Layered Cathode with Ultralow Strain Empowers Rapid-Charging and Slow-Discharging Capability in Sodium Ion Battery.ADVANCED SCIENCE.

Yang, Maolin,et al."Layered Cathode with Ultralow Strain Empowers Rapid-Charging and Slow-Discharging Capability in Sodium Ion Battery".ADVANCED SCIENCE (2024).