In-situ Built Interphase with High Interface Energy and Fast Kinetics for High Performance Zn Metal Anodes

2021 ◽  
Author(s):  
Yuzhu Chu ◽  
Shu Zhang ◽  
Shuang Wu ◽  
Zhenglin Hu ◽  
Guanglei Cui ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Hydrogen Evolution ◽  
High Performance ◽  
Solid Electrolyte Interphase ◽  
Interface Energy ◽  
Dendrite Growth ◽  
Side Reactions ◽  
Fast Kinetics ◽  
Zn Anode

In-situ constructing multifunctional solid electrolyte interphase (SEI) for Zn anode is promising to address the dendrite growth and side reactions (corrosion and hydrogen evolution) in aqueous Zn-ion batteries. However, there...

Bio-inspired design of an in-situ multifunctional polymeric solid-electrolyte interphase for Zn metal anode cycling at 30 mA cm-2 and 30 mA h cm-2

2021 ◽  
Author(s):  
Xiaohui Zeng ◽  
Kaixuan Xie ◽  
Sailin Liu ◽  
Shilin Zhang ◽  
Junnan Hao ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Zinc Ion ◽  
Dendrite Growth ◽  
Side Reactions ◽  
Metal Anode ◽  
Zn Anode ◽  
Polymeric Solid

Solid-electrolyte interphase (SEI) is highly designable to restrain Zn dendrite growth and side reactions between Zn anode and water in rechargeable aqueous zinc-ion batteries (RAZBs), but it remains a challenge....

scholarly journals In situ observation of cracking and self-healing of solid electrolyte interphases during lithium deposition

2020 ◽  
Author(s):  
Tingting Yang ◽  
Hui Li ◽  
Yongfu Tang ◽  
Jingzhao Chen ◽  
Hongjun Ye ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Dendrite Growth ◽  
In Situ Observation ◽  
Self Healing ◽  
Directional Growth ◽  
Transmission Electron ◽  
In Situ Observations ◽  
Li Batteries

Abstract The growth of lithium (Li) whiskers is detrimental to Li batteries. However, it remains a challenge to directly track Li whisker growth. Here we report in situ observations of electrochemically induced Li deposition under a CO2 atmosphere inside an environmental transmission electron microscope. We find that the morphology of individual Li deposits is strongly influenced by the competing processes of cracking and self-healing of the solid electrolyte interphase (SEI). When cracking overwhelms self-healing, the directional growth of Li whiskers predominates. In contrast, when self-healing dominates over cracking, the isotropic growth of round Li particles prevails. The Li deposition rate and SEI constituent can be tuned to control the Li morphologies. We reveal a new “weak-spot” mode of Li dendrite growth, which is attributed to the operation of the Bardeen-Herring growth mechanism in the whisker’s cross section. This work has implications for the control of Li dendrite growth in Li batteries.

scholarly journals Fluorinated solid electrolyte interphase enables highly reversible solid-state Li metal battery

2018 ◽  
Vol 4 (12) ◽  
pp. eaau9245 ◽  
Author(s):  
Xiulin Fan ◽  
Xiao Ji ◽  
Fudong Han ◽  
Jie Yue ◽  
Ji Chen ◽  
...  
Keyword(s):  
Solid State ◽  
Critical Current Density ◽  
Solid Electrolyte ◽  
Critical Current ◽  
Current Density ◽  
Solid Electrolyte Interphase ◽  
High Energy ◽  
Electrochemical Stability ◽  
Side Reactions

Solid-state electrolytes (SSEs) are receiving great interest because their high mechanical strength and transference number could potentially suppress Li dendrites and their high electrochemical stability allows the use of high-voltage cathodes, which enhances the energy density and safety of batteries. However, the much lower critical current density and easier Li dendrite propagation in SSEs than in nonaqueous liquid electrolytes hindered their possible applications. Herein, we successfully suppressed Li dendrite growth in SSEs by in situ forming an LiF-rich solid electrolyte interphase (SEI) between the SSEs and the Li metal. The LiF-rich SEI successfully suppresses the penetration of Li dendrites into SSEs, while the low electronic conductivity and the intrinsic electrochemical stability of LiF block side reactions between the SSEs and Li. The LiF-rich SEI enhances the room temperature critical current density of Li3PS4to a record-high value of >2 mA cm−2. Moreover, the Li plating/stripping Coulombic efficiency was escalated from 88% of pristine Li3PS4to more than 98% for LiF-coated Li3PS4. In situ formation of electronic insulating LiF-rich SEI provides an effective way to prevent Li dendrites in the SSEs, constituting a substantial leap toward the practical applications of next-generation high-energy solid-state Li metal batteries.

Advanced In-Situ Technology for Li/Na Metal Anodes: An In-Depth Mechanism Understanding

2021 ◽  
Author(s):  
Jun Pu ◽  
Chenglin Zhong ◽  
Jiahao Liu ◽  
Zhenghua Wang ◽  
Dongliang Chao
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
High Energy ◽  
Dendrite Growth ◽  
Electrochemical Potential ◽  
Next Generation ◽  
High Theoretical Capacity ◽  
Metal Anodes

Li/Na metal anodes, based on their high theoretical capacity and low electrochemical potential, provide promising alternatives for next-generation high energy batteries. However, their unstable solid-electrolyte interphase and dendrite growth remain...

scholarly journals Computational Studies of Interfacial Reactions at Anode Materials: Initial Stages of the Solid-Electrolyte-Interphase Layer Formation

2016 ◽  
Vol 13 (3) ◽  
Author(s):  
G. Ramos-Sanchez ◽  
F. A. Soto ◽  
J. M. Martinez de la Hoz ◽  
Z. Liu ◽  
P. P. Mukherjee ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Kinetic Monte Carlo ◽  
Solid Electrolyte Interphase ◽  
Interfacial Phenomena ◽  
Interphase Layer ◽  
Side Reactions ◽  
Mechanical Methods ◽  
Negative Electrodes ◽  
Electrochemical Instability

Understanding interfacial phenomena such as ion and electron transport at dynamic interfaces is crucial for revolutionizing the development of materials and devices for energy-related applications. Moreover, advances in this field would enhance the progress of related electrochemical interfacial problems in biology, medicine, electronics, and photonics, among others. Although significant progress is taking place through in situ experimentation, modeling has emerged as the ideal complement to investigate details at the electronic and atomistic levels, which are more difficult or impossible to be captured with current experimental techniques. Among the most important interfacial phenomena, side reactions occurring at the surface of the negative electrodes of Li-ion batteries, due to the electrochemical instability of the electrolyte, result in the formation of a solid-electrolyte interphase layer (SEI). In this work, we briefly review the main mechanisms associated with SEI reduction reactions of aprotic organic solvents studied by quantum mechanical methods. We then report the results of a Kinetic Monte Carlo method to understand the initial stages of SEI growth.

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