A bi-cation electrolyte for a 1.7 V aqueous Zn ion battery.,ACS Applied Materials & Interfaces

当前位置： X-MOL 学术 › ACS Appl. Mater. Interfaces › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

A bi-cation electrolyte for a 1.7 V aqueous Zn ion battery.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-02-28 , DOI: 10.1021/acsami.9b20531
Na Li ₁ , Guoqing Li ₁ , Changji Li ₂ , Huicong Yang ₂ , Gaowu Qin ₁ , Xudong Sun ₁ , Feng Li ₂ , Hui-Ming Cheng _{2,

3}

Affiliation

Rechargeable aqueous zinc-ion batteries (ZIBs) are receiving increased attention due to their high safety and low cost. However, their practical application is plagued by their low energy density as a result of the low output voltage and the narrow voltage window of aqueous electrolytes. Here, we explored a ZIB with wider potential window by using bi-cation (1 M Al(CF3SO3)3/1 M Zn(CF3SO3)2) as the electrolyte and α-MnO2 as the cathode, obtaining a discharge voltage of 1.7 V, ~0.3 V higher than the value reported earlier. The resultant cell delivers a record high energy density of 448 Wh kg-1 (based on MnO2 mass) and retains 100% capacity over 1000 cycles. The ion storage mechanism and the role of Al3+ in enlarging the output voltage were elucidated. This research indicates the important role of using bi-cations to improve the electrochemical performance of aqueous ZIBs, opening a new way to increase the energy density of aqueous energy storage devices.

中文翻译：

用于1.7 V水性Zn离子电池的双阳离子电解质。

可充电锌离子水溶液（ZIB）由于其高安全性和低成本而受到越来越多的关注。然而，由于低的输出电压和水性电解质的窄电压窗口，它们的低能量密度困扰了它们的实际应用。在这里，我们通过使用双阳离子（1 M Al（CF3SO3）3/1 M Zn（CF3SO3）2）作为电解质和α-MnO2作为阴极，探索了具有更宽电位窗口的ZIB，获得了1.7 V的放电电压，比先前报告的值高约0.3V。最终的电池提供了创纪录的448 Wh kg-1（基于MnO2质量）的高能量密度，并在1000次循环中保持了100％的容量。阐明了离子存储机理以及Al3 +在增大输出电压中的作用。

更新日期：2020-03-10

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南