4.7 Article

Directing High-Efficiency Na Plating with Carbon-Aluminum Junction Interfaces for Anode-Free Na Metal Batteries

期刊

ENERGY & FUELS
卷 37, 期 10, 页码 7522-7529

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.3c00891

关键词

-

向作者/读者索取更多资源

This study focuses on the effect of nanosized carbon coating on the Na plating and stripping stability of Al foil current collectors. The carbon coating enables more uniform Na deposition with lower overpotentials, leading to higher than 99.8% Faradaic efficiencies for a wide range of cycling currents between 0.5 and 3.0 mA cm-2. This improvement is attributed to the stronger interfacial binding and enhanced sodiophilic properties of the carbon-aluminum junction sites.
Anode-free sodium metal batteries are highly promising for future energy storage but suffer from much faster cycling degradation as they are sensitive to even trace levels of irreversible side reactions. This work focuses on the most practical Al foil current collectors and systematically examined the effect of nanosized carbon coating on improving the Na plating and stripping stability. We identified that the carbon-Al junction interface generated by carbon coating enabled more uniform Na deposition with lower overpotentials, delivering higher than 99.8% Faradaic efficiencies for a wide range of cycling currents between 0.5 and 3.0 mA cm-2. This performance is much better than the 96.4% efficiency observed on uncoated Al foils under the same conditions and is also confirmed under lean electrolyte and freezing electrolyte conditions and can be attributed to the stronger interfacial binding and enhanced sodiophilic properties of the carbon-aluminum junction sites. These sites not only ensure uniform Na plating but also eliminates side reactions that would otherwise cause electrolyte depletion. As a result, Na-metal free full cells assembled with a high capacity Na3V2(PO4)3 cathode delivered similar to 93% capacity retention for 100 cycles, higher than the similar to 42% of retention of uncoated Al foil.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据