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Activating Selenium Cathode Chemistry for Aqueous Zinc-Ion Batteries
Advanced Materials ( IF 27.4 ) Pub Date : 2023-08-29 , DOI: 10.1002/adma.202306580 Fuhan Cui 1 , Rui Pan 1 , Lin Su 1 , Chongyang Zhu 1 , Hezhe Lin 2 , Ruqian Lian 2 , Ruining Fu 1 , Guoju Zhang 1 , Zhenjing Jiang 1 , XueChen Hu 1 , Yuchen Pan 1 , Shisheng Hou 1 , Fuchun Zhang 3 , Kai Zhu 4 , Yanhao Dong 5 , Feng Xu 1
Advanced Materials ( IF 27.4 ) Pub Date : 2023-08-29 , DOI: 10.1002/adma.202306580 Fuhan Cui 1 , Rui Pan 1 , Lin Su 1 , Chongyang Zhu 1 , Hezhe Lin 2 , Ruqian Lian 2 , Ruining Fu 1 , Guoju Zhang 1 , Zhenjing Jiang 1 , XueChen Hu 1 , Yuchen Pan 1 , Shisheng Hou 1 , Fuchun Zhang 3 , Kai Zhu 4 , Yanhao Dong 5 , Feng Xu 1
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Aqueous rechargeable zinc-ion batteries (ARZIBs) are a promising next-generation energy-storage device by virtue of the superior safety and low cost of both the aqueous electrolyte and zinc-metal anode. However, their development is hindered by the lack of suitable cathodes with high volumetric capacity that can provide both lightweight and compact size. Herein, a novel cathode chemistry based on amorphous Se doped with transition metal Ru that mitigates the resistive surface layer produced by the side reactions between the Se cathode and aqueous electrolyte is reported. This improvement can permit high volumetric capacity in this system. Distinct from the conventional conversion mechanisms between Se and ZnSe in Se||Zn cells, this strategy realizes synchronous proton and Zn2+ intercalation/deintercalation in the Ru-doped amorphous Se||Zn half cells. Moreover, an unanticipated Zn2+ deposition/stripping process in this system further contributes to the superior electrochemical performance of this new cathode chemistry. Consequently, the Ru-doped amorphous Se||Zn half cells are found to deliver a record-high capacity of 721 mAh g−1/3472 mAh cm−3, and superior cycling stability of over 800 cycles with only 0.015% capacity decay per cycle. This reported work opens the door for new chemistries that can further improve the gravimetric and volumetric capacity of ARZIBs.
中文翻译：
水系锌离子电池的硒阴极化学活化
水系可充电锌离子电池（ARZIB）凭借水系电解质和锌金属阳极的卓越安全性和低成本而成为一种有前途的下一代储能装置。然而，由于缺乏合适的具有高体积容量、可以提供轻质和紧凑尺寸的阴极，它们的发展受到阻碍。本文报道了一种基于非晶硒并掺杂过渡金属 Ru 的新型阴极化学物质，可减轻 Se 阴极与水性电解质之间的副反应产生的电阻表面层。这种改进可以允许该系统具有高容量。与Se||Zn电池中Se和ZnSe之间的传统转换机制不同，该策略在Ru掺杂非晶Se||Zn半电池中实现了同步质子和Zn 2+嵌入/脱嵌。此外，该系统中意想不到的Zn 2+沉积/剥离过程进一步有助于这种新型阴极化学物质的优异电化学性能。因此，Ru掺杂非晶Se||Zn半电池被发现具有721 mAh g -1 /3472 mAh cm -3的创纪录高容量，以及超过800次循环的优异循环稳定性，每次容量衰减仅为0.015%循环。这项报道的工作为新化学物质打开了大门，可以进一步提高 ARZIB 的重量和体积容量。
更新日期：2023-08-29
中文翻译：
水系锌离子电池的硒阴极化学活化
水系可充电锌离子电池（ARZIB）凭借水系电解质和锌金属阳极的卓越安全性和低成本而成为一种有前途的下一代储能装置。然而，由于缺乏合适的具有高体积容量、可以提供轻质和紧凑尺寸的阴极，它们的发展受到阻碍。本文报道了一种基于非晶硒并掺杂过渡金属 Ru 的新型阴极化学物质，可减轻 Se 阴极与水性电解质之间的副反应产生的电阻表面层。这种改进可以允许该系统具有高容量。与Se||Zn电池中Se和ZnSe之间的传统转换机制不同，该策略在Ru掺杂非晶Se||Zn半电池中实现了同步质子和Zn 2+嵌入/脱嵌。此外，该系统中意想不到的Zn 2+沉积/剥离过程进一步有助于这种新型阴极化学物质的优异电化学性能。因此，Ru掺杂非晶Se||Zn半电池被发现具有721 mAh g -1 /3472 mAh cm -3的创纪录高容量，以及超过800次循环的优异循环稳定性，每次容量衰减仅为0.015%循环。这项报道的工作为新化学物质打开了大门，可以进一步提高 ARZIB 的重量和体积容量。
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