skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Nanoscale Interfacial Engineering for Stable Lithium Metal Anodes

Abstract

Li-ion battery has gain great success as the power source for portable electronics, electric vehicles and grid scale energy storage. However, its energy density has achieved a bottleneck which calls for the further innovation of battery technologies especially those beyond Li-ion. Li metal anode has long been regarded as the "holy grail" for Li battery research, which is not only due to its highest theoretical capacity of 3860 mAh/g and lowest electrochemical potential, but also its key role in Li-S and Li-air battery systems, both of which are the most prominent battery chemistries for the next-generation energy storage technology. However, many challenges have been encountered on its way to commercialization. Among all problems of Li metal, there are two root causes, namely high reactivity of Li and its infinite relative volume change during cycling. On one hand, the high reactivity of Li results in the excess side reactions once is exposed to liquid electrolyte, which further lead to complex interfacial chemistry, blocked ion transport and the consumption of materials. On the other hand, the infinite relative volume change makes the solid electrolyte interphase (SEI) prone to fracture, which not only creates hot spots for uneven Li-ion flux distribution and thusmore » dendritic deposition, but also exposes fresh Li for further side reactions, leading to low Coulombic efficiency. Under the circumstance, it is necessary to develop surface protection techniques as well as to improve the electrode volume stability in order to solve all the above-mentioned problems. Correspondingly, we successfully developed a set of nano-synthesis techniques to realize the proposed concepts in this study. The major achievements through this study include: The development of novel, three-dimensional Li composites to minimize the electrode-level volume change and excessive interfacial fluctuation during cycling. The development of various Li metal surface coating materials (inorganic materials, polymers, composites, etc.) and fundamentally studied the relationships between material properties and the electrochemical performance of Li metal anode. The combination between three-dimensional Li and effective surface coating rendered significant improvement in Li metal cycling efficiency and safety« less

Authors:
ORCiD logo [1]
  1. Stanford Univ., CA (United States)
Publication Date:
Research Org.:
Stanford Univ., CA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1509739
Report Number(s):
DE-EE-0006828
6507233149
DOE Contract Number:  
EE0006828
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Cui, yi. Nanoscale Interfacial Engineering for Stable Lithium Metal Anodes. United States: N. p., 2018. Web. doi:10.2172/1509739.
Cui, yi. Nanoscale Interfacial Engineering for Stable Lithium Metal Anodes. United States. https://doi.org/10.2172/1509739
Cui, yi. Sat . "Nanoscale Interfacial Engineering for Stable Lithium Metal Anodes". United States. https://doi.org/10.2172/1509739. https://www.osti.gov/servlets/purl/1509739.
@article{osti_1509739,
title = {Nanoscale Interfacial Engineering for Stable Lithium Metal Anodes},
author = {Cui, yi},
abstractNote = {Li-ion battery has gain great success as the power source for portable electronics, electric vehicles and grid scale energy storage. However, its energy density has achieved a bottleneck which calls for the further innovation of battery technologies especially those beyond Li-ion. Li metal anode has long been regarded as the "holy grail" for Li battery research, which is not only due to its highest theoretical capacity of 3860 mAh/g and lowest electrochemical potential, but also its key role in Li-S and Li-air battery systems, both of which are the most prominent battery chemistries for the next-generation energy storage technology. However, many challenges have been encountered on its way to commercialization. Among all problems of Li metal, there are two root causes, namely high reactivity of Li and its infinite relative volume change during cycling. On one hand, the high reactivity of Li results in the excess side reactions once is exposed to liquid electrolyte, which further lead to complex interfacial chemistry, blocked ion transport and the consumption of materials. On the other hand, the infinite relative volume change makes the solid electrolyte interphase (SEI) prone to fracture, which not only creates hot spots for uneven Li-ion flux distribution and thus dendritic deposition, but also exposes fresh Li for further side reactions, leading to low Coulombic efficiency. Under the circumstance, it is necessary to develop surface protection techniques as well as to improve the electrode volume stability in order to solve all the above-mentioned problems. Correspondingly, we successfully developed a set of nano-synthesis techniques to realize the proposed concepts in this study. The major achievements through this study include: The development of novel, three-dimensional Li composites to minimize the electrode-level volume change and excessive interfacial fluctuation during cycling. The development of various Li metal surface coating materials (inorganic materials, polymers, composites, etc.) and fundamentally studied the relationships between material properties and the electrochemical performance of Li metal anode. The combination between three-dimensional Li and effective surface coating rendered significant improvement in Li metal cycling efficiency and safety},
doi = {10.2172/1509739},
url = {https://www.osti.gov/biblio/1509739}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {6}
}