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All-climate aqueous Na-ion batteries using “water-in-salt” electrolyte
Science Bulletin ( IF 18.9 ) Pub Date : 2021-08-17 , DOI: 10.1016/j.scib.2021.08.010
Yu Zhang 1 , Jie Xu 1 , Zhi Li 1 , Yanrong Wang 1 , Sijia Wang 2 , Xiaoli Dong 1 , Yonggang Wang 1
Affiliation  

Aqueous Na-ion batteries have been extensively studied for large-scale energy storage systems. However, their wide application is still limited by their inferior cycle stability (<3000 cycles) and poor temperature tolerance. Furthermore, many of the reported high rate behaviors are achieved at a low mass loading (<3 mg cm−2) of the electrodes. Herein, we propose an aqueous Na-ion battery which includes a Ni-based Prussian blue (NiHCF) cathode, a carbonyl-based organic compound, 5,7,12,14-pentacenetetrone (PT) anode and a “water-in-salt” electrolyte (17 mol kg−1 NaClO4 in water). Its operation involves the reversible coordination reaction of the PT anode and the extraction/insertion of Na+ in the NiHCF cathode. It is demonstrated that the wide internal spaces of the PT anode and NiHCF cathode can not only buffer the volumetric change induced by Na+ storage, but also enable fast kinetics. The full cell exhibits a supercapacitor-like rate performance of 50 A g−1 (corresponding to a discharge or charge within 6.3 s) and a super-long lifespan of 15,000 cycles. Moreover, the excellent rate performance can still be preserved even with a high mass loading of the electrodes (15 mgNiHCF cm−2 and 8 mgPT cm−2). Especially, the cell can work well in a wide temperature range, from −40 to 100 °C, showing a typical all-climate operation.



中文翻译:

使用“盐包水”电解质的全气候水系钠离子电池

水系钠离子电池已被广泛研究用于大规模储能系统。然而,它们的广泛应用仍然受到其较差的循环稳定性(<3000 次循环)和较差的温度耐受性的限制。此外,许多报道的高速率行为是在电极的低质量负载(<3 mg cm -2 )下实现的。在此,我们提出了一种水系钠离子电池,它包括镍基普鲁士蓝 (NiHCF) 阴极、羰基有机化合物、5,7,12,14-并五苯四酮 (PT) 阳极和“水包”盐”电解质(17 mol kg -1 NaClO 4水溶液)。其操作涉及PT阳极的可逆配位反应和Na +的脱嵌在 NiHCF 阴极中。结果表明,PT 阳极和 NiHCF 阴极的宽阔内部空间不仅可以缓冲 Na +存储引起的体积变化,还可以实现快速动力学。全电池表现出50 A g -1的类超级电容器倍率性能(对应于6.3 s内的放电或充电)和15,000次循环的超长寿命。此外,即使在电极的高质量负载(15 mg NiHCF cm -2和8 mg PT cm -2)下,仍然可以保持优异的倍率性能。特别是,电池可以在-40至100°C的宽温度范围内良好工作,显示出典型的全气候运行。

更新日期:2021-08-17
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