首页|Ideal Bi-Based Hybrid Anode Material for Ultrafast Charging of Sodium-Ion Batteries at Extremely Low Temperatures
Ideal Bi-Based Hybrid Anode Material for Ultrafast Charging of Sodium-Ion Batteries at Extremely Low Temperatures
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Ideal Bi-Based Hybrid Anode Material for Ultrafast Charging of Sodium-Ion Batteries at Extremely Low Temperatures
Sodium-ion batteries have emerged as competitive sub-stitutes for low-temperature applications due to severe capacity loss and safety concerns of lithium-ion batteries at-20℃ or lower.However,the key capability of ultrafast charging at ultralow temperature for SIBs is rarely reported.Herein,a hybrid of Bi nanoparticles embedded in car-bon nanorods is demonstrated as an ideal material to address this issue,which is synthesized via a high temperature shock method.Such a hybrid shows an unprecedented rate performance(237.9 mAh g-1 at 2 A g-1)at-60℃,outperforming all reported SIB anode materials.Coupled with a Na3V2(PO4)3 cathode,the energy density of the full cell can reach to 181.9 Wh kg-1 at-40℃.Based on this work,a novel strategy of high-rate activation is proposed to enhance performances of Bi-based materials in cryogenic conditions by creating new active sites for interfacial reaction under large current.
Bi nanoparticlesHigh temperature shockHigh-rate activationUltrafast chargingLow-temperature sodium-ion batteries
Jie Bai、Jian Hui Jia、Yu Wang、Chun Cheng Yang、Qing Jiang
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Key Laboratory of Automobile Materials(Jilin University),Ministry of Education,School of Materials Science and Engineering,Jilin University,Changchun 130022,People's Republic of China
Bi nanoparticles High temperature shock High-rate activation Ultrafast charging Low-temperature sodium-ion batteries
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