材料科学
离子液体
电解质
阳极
钠离子电池
化学工程
电池(电)
钠
离子
法拉第效率
电极
化学
有机化学
热力学
冶金
物理化学
物理
工程类
催化作用
功率(物理)
作者
Hongzheng Wu,Tao Hu,Shuya Chang,Li Li,Wenhui Yuan
标识
DOI:10.1021/acsami.1c10836
摘要
Combining the advantages of dual-ion batteries (DIBs) and sodium-ion batteries (SIBs), we herein develop a superior sodium-based dual-ion battery (Na-DIB) based on the PTCDA organic anode and ionic liquid (IL) electrolyte. The system shows the highest specific discharge capacity of 177 mAh g–1 at 0.5C and excellent capacity retention over 100% at 2C after 200 cycles. Notably, even at an ultrahigh rate of 20C, the battery still maintains a considerable capacity of 60 mAh g–1 with a coulombic efficiency (CE) close to 100 and 94% capacity retention after 1000 cycles. Moreover, the self-discharge of the system has been investigated and shown to have an extremely low value of 0.18% h–1. Consequently, this work presents an excellent Na-DIB system, which could be a promising candidate for large-scale applications.
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