Efficient Diffusion of Superdense Lithium via Atomic Channel for Dendrite-Free Lithium-Metal Batteries

2021 ◽  
Author(s):  
Shiyuan Zhou ◽  
Weixin Chen ◽  
Jie Shi ◽  
Gen Li ◽  
Fei Pei ◽  
...  
Keyword(s):  
Dendrite Growth ◽  
Anode Surface ◽  
Lithium Metal ◽  
Lithium Metal Batteries ◽  
Efficient Diffusion ◽  
Nucleation Growth

The non-uniform aggregation of fast-diffused Li on anode surface would aggravate its tip-effect-induced nucleation/growth, leading to the notorious dendrite growth in Li metal batteries (LMBs). Tuning Li diffusion on anode...

scholarly journals Constructing multifunctional solid electrolyte interface via in-situ polymerization for dendrite-free and low N/P ratio lithium metal batteries

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Dan Luo ◽  
Lei Zheng ◽  
Zhen Zhang ◽  
Matthew Li ◽  
Zhongwei Chen ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
In Situ Polymerization ◽  
Dendrite Growth ◽  
Solid Electrolyte Interface ◽  
Lithium Metal ◽  
Growth Orientation ◽  
Lithium Metal Batteries ◽  
Electrolyte Interface ◽  
Nucleation Growth

AbstractStable solid electrolyte interface (SEI) is highly sought after for lithium metal batteries (LMB) owing to its efficient electrolyte consumption suppression and Li dendrite growth inhibition. However, current design strategies can hardly endow a multifunctional SEI formation due to the non-uniform, low flexible film formation and limited capability to alter Li nucleation/growth orientation, which results in unconstrained dendrite growth and short cycling stability. Herein, we present a novel strategy to employ electrolyte additives containing catechol and acrylic groups to construct a stable multifunctional SEI by in-situ anionic polymerization. This self-smoothing and robust SEI offers multiple sites for Li adsorption and steric repulsion to constrain nucleation/growth process, leading to homogenized Li nanosphere formation. This isotropic nanosphere offers non-preferred Li growth orientation, rendering uniform Li deposition to achieve a dendrite-free anode. Attributed to these superiorities, a remarkable cycling performance can be obtained, i.e., high current density up to 10 mA cm−2, ultra-long cycle life over 8500 hrs operation, high cumulative capacity over 4.25 Ah cm−2 and stable cycling under 60 °C. A prolonged lifespan can also be achieved in Li-S and Li-LiFePO4 cells under lean electrolyte content, low N/P ratio or high temperature conditions. This facile strategy also promotes the practical application of LMB and enlightens the SEI design in related fields.

Boron additive passivated carbonate electrolytes for stable cycling of 5 V lithium–metal batteries

2019 ◽  
Vol 7 (2) ◽  
pp. 594-602 ◽  
Author(s):  
Hongyun Yue ◽  
Yange Yang ◽  
Yan Xiao ◽  
Zhiyuan Dong ◽  
Shuguo Cheng ◽  
...  
Keyword(s):  
High Voltage ◽  
Dendrite Growth ◽  
Lithium Metal ◽  
Metal Anode ◽  
Lithium Metal Batteries ◽  
Li Metal Anode ◽  
Oxidation Loss

The limitation of a high-voltage lithium (Li) metal battery lies in the absence of a robust electrolyte that can endure oxidation loss at a high-voltage cathode and suppress the dendrite growth at a Li metal anode.

scholarly journals Lithiophilic montmorillonite serves as lithium ion reservoir to facilitate uniform lithium deposition

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Wei Chen ◽  
Yin Hu ◽  
Weiqiang Lv ◽  
Tianyu Lei ◽  
Xianfu Wang ◽  
...  
Keyword(s):  
Specific Capacity ◽  
Lithium Ion ◽  
Ion Concentration ◽  
Anode Surface ◽  
Lithium Metal ◽  
Ion Distribution ◽  
Interfacial Engineering ◽  
Lithium Metal Batteries ◽  
Lithium Deposition ◽  
Current Densities

Abstract The growing demand for lithium batteries with higher energy densities requires new electrode chemistries. Lithium metal is a promising candidate as the anode material due to its high theoretical specific capacity, negative electrochemical potential and favorable density. However, during cycling, low and uneven lithium ion concentration on the surface of anode usually results in uncontrolled dendrite growth, especially at high current densities. Here we tackle this issue by using lithiophilic montmorillonite as an additive in the ether-based electrolyte to regulate the lithium ion concentration on the anode surface and thus facilitate the uniform lithium deposition. The lithiophilic montmorillonite demonstrates a pumping feature that improves the self-concentrating kinetics of the lithium ion and thus accelerates the lithium ion transfer at the deposition/electrolyte interface. The signal intensity of TFSI− shows negligible changes via in situ Raman tracking of the ion flux at the electrochemical interface, indicating homogeneous ion distribution, which can lead to a stable and uniform lithium deposition on the anode surface. Our study indicates that the interfacial engineering induced by the lithiophilic montmorillonite could be a promising strategy to optimize the lithium deposition for next-generation lithium metal batteries.

Dendrite Suppression and Energy Density in Metal Batteries With Electrolyte Flow Through Perforated Electrodes

2020 ◽  
Author(s):  
Mihir Parekh ◽  
Christopher Rahn
Keyword(s):  
Energy Density ◽  
Charge Density ◽  
Short Circuit ◽  
Dendrite Growth ◽  
Specific Charge ◽  
Lithium Metal ◽  
Metal Electrodes ◽  
Electrolyte Flow ◽  
Lithium Metal Batteries ◽  
Flow Through

Abstract Previous research shows that forced advection through porous lithium metal electrodes can eliminate dendrite growth in lithium metal batteries. In this paper, we study the effect of creeping electrolyte flow through perforated metal anodes on dendrite growth and energy density by using a 2D COMSOL Multiphysics model. The flowing electrolyte enhances plating inside the slot (2D model of pore) and reduces plating on the part of electrode directly facing the counter-electrode. This reduces the chances of short circuit via dendrite growth. Higher electrolyte velocity reduces the plating current density in the inter-slot gap and increases the amount of plating in the slot. Larger slot separation and thicker electrodes alleviate dendrite growth but lower the specific charge density. Wider slots enhance the possibility of short circuits and narrower slots may get plugged due to plating inside the hole. Thus, slot width, slot separation, and electrode thickness should be optimized to ensure high specific charge density and non-dendritic plating in the inter-slot gap.

Asymmetric gel polymer electrolyte with high lithium ion conductivity for dendrite-free lithium metal batteries

2020 ◽  
Vol 8 (16) ◽  
pp. 8033-8040 ◽  
Author(s):  
Linge Li ◽  
Mingchao Wang ◽  
Jian Wang ◽  
Fangmin Ye ◽  
Shaofei Wang ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
High Performance ◽  
Gel Polymer Electrolyte ◽  
Lithium Ion ◽  
Dendrite Growth ◽  
Ion Conductivity ◽  
Lithium Metal ◽  
Lithium Metal Batteries ◽  
Lithium Ion Conductivity

An asymmetric gel polymer electrolyte is designed for regulating ions and suppressing Li dendrite growth in high-performance Li metal batteries.

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