新型炭材料（中英文）2023，Vol.38Issue(4)：776-786,11.DOI:10.1016/S1872-5805(23)60766-8
揭示金属锂负极电化学行为的影响因素:电子转移和锂离子输运
The factors that influence the electrochemical behavior of lithium met-al anodes:electron transfer and Li-ion transport
摘要
Abstract
Structured carbon-based hosts for the Li anode both improve the transport of Li-ions and reduce the electron transfer rate and have proven to be an effective way to suppress dendrite growth in lithium metal anodes.An in-depth understanding of these effects is needed to clarify the intrinsic electrochemical mechanism involved.We used the finite element method to simulate the two crucial processes controlling Li-ion behavior,electron transfer and Li-ion transport,and visualized the local deposition rate,the over-potential,and the Li-ion concentration in a three-dimensional(3D)Li//electrolyte//Li cell.Our analysis showed a competitive rela-tionship between the rates of Li-ion transport and electron transfer.When the electron transfer rate is relatively slow,there are suffi-cient Li-ions available near the anode surface and the deposition behavior is controlled by electron transfer.However,when the num-ber of Li-ions is low,Li-ion transport dominates the deposition process because it is unable to keep up with electron transfer,and this causes dendrite formation.Therefore,reducing the reactivity of the Li anode and accelerating Li-ion transport are the two key factors to produce uniform Li metal deposition on the anode,particularly under fast charging conditions and in practical use.关键词
金属锂负极/有限元法/电子转移/锂离子输运Key words
Lithium metal anodes/Finite element method/Electron transfer/Li-ion transport分类
化学化工引用本文复制引用
张梦天,曲浩天,周光敏..揭示金属锂负极电化学行为的影响因素:电子转移和锂离子输运[J].新型炭材料（中英文）,2023,38(4):776-786,11.基金项目
We appreciate the support from the National Key Research and Development Program of China(2019YFA0705703),Joint Funds of the National Nat-ural Science Foundation of China(U21A20174),Na-tional Natural Science Foundation of China(52072205),Shenzhen Science and Technology Pro-gram(KQTD20210811090112002),Guangdong In-novative and Entrepreneurial Research Team Pro-gram(2021ZT09L197),Start-up Fund,and the Over-seas Research Cooperation Fund of Tsinghua Shen-zhen International Graduate School.国家重点研发计划(2019YFA0705703)、国家自然科学基金(U21A20174)、国家自然科学基金(52072205)、深圳市科技计划(KQTD20210811090112002)、广东省创新创业研究团队计划(2021ZT09L197)、创业基金、清华大学深圳国际研究生院海外科研合作基金的支持. （2019YFA0705703）
