Sung-Ho Huh, So Hee Kim, Jong-Seong Bae, Seung-Ho Yu
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引用次数: 0
Abstract
The lithium (Li) metal anode is regarded as the upcoming generation of battery anodes due to its high theoretical capacity (3860 mAh g−1) and low standard reduction potential (−3.04 vs SHE). Addressing challenges related to the formation of Li metal dendrites, such as short circuits and low Coulombic efficiency, is crucial for the practical implementation of Li metal anodes. Previous research on Li metal has primarily focus on the Li plating process for achieving homogeneous growth. However, our study highlights the significance of pit formation variations, which significantly influence Li growth behavior in subsequent cycles. Expanding on this understanding, we formulated electrochemical activation conditions to promote uniform pit formation, thereby doubling the cycle life in a symmetric cell, and increasing the capacity retention of NCM622||Li full-cell from 68.7% to 79.5% after 500 cycles.
锂(Li)金属阳极由于其高理论容量(3860 mAh g - 1)和低标准还原电位(- 3.04 vs SHE)而被认为是即将到来的一代电池阳极。解决与锂金属枝晶形成相关的挑战,如短路和低库仑效率,对于锂金属阳极的实际实施至关重要。以往对锂金属的研究主要集中在实现均匀生长的镀锂工艺上。然而,我们的研究强调了坑形变化的重要性,它显著影响了随后旋回中的锂生长行为。在此基础上,我们制定了促进均匀坑形成的电化学激活条件,从而使对称电池的循环寿命增加一倍,并将NCM622||Li充满电池的容量保留率从500次循环后的68.7%提高到79.5%。
期刊介绍:
Energy & Environmental Materials (EEM) is an international journal published by Zhengzhou University in collaboration with John Wiley & Sons, Inc. The journal aims to publish high quality research related to materials for energy harvesting, conversion, storage, and transport, as well as for creating a cleaner environment. EEM welcomes research work of significant general interest that has a high impact on society-relevant technological advances. The scope of the journal is intentionally broad, recognizing the complexity of issues and challenges related to energy and environmental materials. Therefore, interdisciplinary work across basic science and engineering disciplines is particularly encouraged. The areas covered by the journal include, but are not limited to, materials and composites for photovoltaics and photoelectrochemistry, bioprocessing, batteries, fuel cells, supercapacitors, clean air, and devices with multifunctionality. The readership of the journal includes chemical, physical, biological, materials, and environmental scientists and engineers from academia, industry, and policy-making.