Recently developed strategies to restrain dendrite growth of Li metal anodes for rechargeable batteries
Recently developed strategies to restrain dendrite growth of Li metal anodes for rechargeable batteries
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DOI：
10.1007/s12598-020-01432-2
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发表时间：
2020-05
期刊：
影响因子：
8.8
通讯作者：
Kaichao Pu;Xin Zhang;Xiaolei Qu;Jianjiang Hu;Haiwen Li;Mingqi Gao;H. Pan;Yongfeng Liu
中科院分区：
文献类型：
--
作者：
Kaichao Pu;Xin Zhang;Xiaolei Qu;Jianjiang Hu;Haiwen Li;Mingqi Gao;H. Pan;Yongfeng Liu
金属锂因其极高的理论重量容量（3860 mAh·g-1）和较低的电化学电位（-3.04V）而被认为是高能量密度电池最有前途的阳极材料之一。然而，锂枝晶生长的不可控性和固体电解质界面层的反复破坏/形成导致锂负极的安全性差、长期使用的库仑效率低，极大地限制了锂金属负极的实际应用。本文综述了近年来抑制锂枝晶生长的研究进展。锂金属阳极的保护策略包括设计多孔结构主体、制造人工固体电解质界面（SEI）层、引入电解质添加剂、使用固态电解质和施加外场。通过调节锂离子的溶出和沉积行为可以实现对锂金属阳极的保护。最后，对锂金属电池系统面临的挑战和锂金属阳极在实际应用中的未来前景进行了概述，以期为该领域的未来研究提供指导。
Lithium metal has been regarded as one of the most promising anode materials for high-energy-density batteries due to its extremely high theoretical gravimetric capacity of 3860 mAh·g−1along with its low electrochemical potential of − 3.04 V. Unfortunately, uncontrollable Li dendrite growth and repetitive destruction/formation of the solid electrolyte interphase layer lead to poor safety and low Coulombic efficiencies (CEs) for long-term utilization, which largely restricts the practical applications of lithium metal anode. In this review, we comprehensively summarized important progresses achieved to date in suppressing Li dendrite growth. Strategies for protection of Li metal anodes include designing porous structured hosts, fabricating artificial solid electrolyte interface (SEI) layers, introducing electrolyte additives, using solid-state electrolytes and applying external fields. The protection of Li metal anodes can be achieved by regulating the stripping and deposition behaviours of Li ions. Finally, the challenges remaining for lithium metal battery systems and future perspectives for Li metal anodes in practical applications are outlined, which are expected to shed light on future research in this field.