Na0.44MnO2 coated with In2O3 as a high-voltage cathode for sodium-ion batteries

2022 ◽  
Vol 896 ◽  
pp. 163087
Wen Liu ◽  
Qiaochu Ren ◽  
Min Yang ◽  
Li Liu ◽  
Yue Zhang ◽  
2021 ◽  
Vol 12 (1) ◽  
Erik A. Wu ◽  
Swastika Banerjee ◽  
Hanmei Tang ◽  
Peter M. Richardson ◽  
Jean-Marie Doux ◽  

AbstractRechargeable solid-state sodium-ion batteries (SSSBs) hold great promise for safer and more energy-dense energy storage. However, the poor electrochemical stability between current sulfide-based solid electrolytes and high-voltage oxide cathodes has limited their long-term cycling performance and practicality. Here, we report the discovery of the ion conductor Na3-xY1-xZrxCl6 (NYZC) that is both electrochemically stable (up to 3.8 V vs. Na/Na+) and chemically compatible with oxide cathodes. Its high ionic conductivity of 6.6 × 10−5 S cm−1 at ambient temperature, several orders of magnitude higher than oxide coatings, is attributed to abundant Na vacancies and cooperative MCl6 rotation, resulting in an extremely low interfacial impedance. A SSSB comprising a NaCrO2 + NYZC composite cathode, Na3PS4 electrolyte, and Na-Sn anode exhibits an exceptional first-cycle Coulombic efficiency of 97.1% at room temperature and can cycle over 1000 cycles with 89.3% capacity retention at 40 °C. These findings highlight the immense potential of halides for SSSB applications.

2019 ◽  
Vol 31 (46) ◽  
pp. 1904816 ◽  
Kuan Wang ◽  
Hui Wan ◽  
Pengfei Yan ◽  
Xiao Chen ◽  
Junjie Fu ◽  

2021 ◽  
Vol 130 (1B) ◽  
pp. 59-67
Thien Lan Tran ◽  
Huu Duc Luong ◽  
Trong Lam Pham ◽  
Viet Bac Phung ◽  
Van An Dinh

Based on the density functional theory, we propose a promising cathode material, Na2Fe3(SO4)4, applicable for sodium-ion batteries. The crystal structure, stability, average voltage, and diffusion mechanism are carefully investigated to evaluate the electrochemical properties. The proposed material exhibits a high voltage of 4.0 V during the Na extraction. A small polaron is proved to be formed preferably at the first nearest Fe sites to Na vacancy and simultaneously accompanies the Na vacancy during its migration. Four elementary diffusion processes of the polaron–Na vacancy complexes, namely two parallel and two crossing processes, have been explored. The significant difference of activation energies between parallel and crossing processes suggests the substantial effect of the small polaron migration on the Na vacancy diffusion. We found that the parallel process along the [001] direction has the lowest activation energy of 808 meV, implying that the Na vacancy preferably diffuses in a zigzag pathway along the [001] direction.

2017 ◽  
Vol 5 (3) ◽  
pp. 1300-1310 ◽  
Deu S. Bhange ◽  
Ghulam Ali ◽  
Dong-Hyun Kim ◽  
Daniel A. Anang ◽  
Tae Joo Shin ◽  

Layer structured Na3Ni2BiO6 with honeycomb ordering is explored as a new high voltage and long life cathode material for sodium-ion batteries.

2019 ◽  
Vol 7 (21) ◽  
pp. 13197-13204 ◽  
Wenli Pan ◽  
Wenhao Guan ◽  
Shuangyu Liu ◽  
Ben Bin Xu ◽  
Chu Liang ◽  

A new high-voltage earth-abundant cathode for sodium-ion batteries, Na2Fe(SO4)2, is reported, combining high thermal stability and good moisture resistance.

2016 ◽  
Vol 4 (2) ◽  
pp. 451-457 ◽  
Rafael B. Araujo ◽  
M. S. Islam ◽  
Sudip Chakraborty ◽  
R. Ahuja

Sodium ion batteries have emerged as a good alternative to lithium based systems due to their low cost of production.

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