集电器
电流(流体)
材料科学
工艺工程
能量(信号处理)
高效能源利用
汽车工程
电气工程
工程类
电池(电)
功率(物理)
物理
量子力学
作者
Weixin Zhang,Shuai Yan,Haomiao Li,Li Fan,Bo Li,Hao Zhou,Xianbo Zhou,Zehang Li,Ya-Ling He,Y. Jay Guo,Shouhua Feng,Kai Jiang,Kangli Wang
标识
DOI:10.1016/j.cej.2024.150277
摘要
Liquid metal battery (LMB) is one of the most competitive large-scale energy storage technologies due to its low-cost, long-lifespan, and high-safety. However, the low energy efficiency of the battery is currently one of the major challenges hindering its application process. The problem of poor wettability of the cathode liquid alloy is exacerbated by the design of the conventional planar structure of the positive collector. And the resulting interfacial mass transfer modes are inefficient. These lead to slow electrode reaction kinetics and large internal polarization. To address this issue, a novel array current collector suitable for LMB was designed here for the first time. The unique structure of the collector greatly increases the effective reaction area at the electrolyte/cathode and the contact area of the cathode/collector, providing more efficient nucleation and growth modes of the products as well as richer ionic mass-transfer channels, thus accelerating the electrode reaction kinetics. Benefiting from the application of the array current collector, the voltage efficiency of Li||Sb-Sn LMBs with a capacity of 20 Ah at 0.5C rate is increased by 4.8 %. Meanwhile, an average voltage efficiency of ∼ 94.7 % and an average energy efficiency of ∼ 92.2 % are achieved at 0.1C, which is the highest efficiency among the most promising LMB systems known to date. These encouraging results provide new directions for the design of high-performance LMBs and further promote the practical process of LMBs.
科研通智能强力驱动
Strongly Powered by AbleSci AI