Jiahao Tang , Jiale Cao , Yunxuan Jiang , Siying Gou , Ruiqi Yao , Yingqi Li , Bo-Tian Liu
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引用次数: 0
摘要
在实际工业应用中,锌粉(Zn-P)阳极比常用的锌箔阳极更加理想,因为它们成本低、可调性好且易于加工。然而,具有高接触表面积的 Zn-P 阳极与锌箔相比存在更严重的副反应。在此,我们通过简单的喷涂和退火相结合的方法,合成了一种无定形碳涂层锌粉基阳极(C@Zn-P),以实现更均匀的锌沉积。结果,C@Zn-P 阳极在 1 mA cm-2 和 0.5 mA h cm-2 条件下表现出超过 600 小时的长期循环稳定性和 20 mV 的低电压滞后,优于之前大多数商用锌箔和锌粉基阳极的结果。值得一提的是,与 Zn||Ti 不对称电池相比,C@Zn-P||Ti 不对称电池在锌的电镀/剥离方面表现出更优越的可逆性能和更高的库仑效率(CE)。此外,与多价钒基氧化物(MVO)阴极相匹配的 C@Zn-P 阳极显示出卓越的长期循环性能,1000 次循环后的容量保持率(CR)为 81.4%。这一结果表明,锌粉阳极是进一步开发可充电锌离子电池的一个前景广阔的途径。
Spraying amorphous carbon coated zinc to prepare powder-based anodes for long-life zinc-ion batteries†
Zinc powder (Zn-P) anodes are more ideal for Zn-ion batteries in practical industrial applications than the commonly used zinc foil anodes due to their low cost, good tunability and easy-processability. However, the Zn-P anodes with high contact surface area suffer from more serious side reactions than zinc foil. Herein, we synthesize an amorphous carbon coated zinc powder-based anode (C@Zn-P) for more homogeneous Zn deposition through a combined simple spraying and annealing method. As a result, the C@Zn-P anode exhibits long-term cycling stability over 600 h with low voltage hysteresis of 20 mV at 1 mA cm−2 and 0.5 mA h cm−2, which outperforms most previous results from commercial Zn foil and powder-based anodes. It is worth mentioning that a C@Zn-P||Ti asymmetric cell shows superior reversible properties and higher coulombic efficiency (CE) compared with the Zn||Ti asymmetric cell in plating/stripping of Zn. Moreover, the C@Zn-P anode matched with a multivalent vanadium-based oxide (MVO) cathode shows superior long-term cycling with a capacity retention (CR) of 81.4% after 1000 cycles. This result demonstrates that the Zn powder anode is a promising avenue for further development of rechargeable Zn-ion batteries.
期刊介绍:
Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.