Nanoscale observation of the solid electrolyte interface and lithium dendrite nucleation–growth process during the initial lithium electrodeposition

2020 ◽  
Vol 8 (35) ◽  
pp. 18348-18357
Author(s):  
Shuwei Wang ◽  
Xiaoguang Yin ◽  
Dongqing Liu ◽  
Yuanming Liu ◽  
Xianying Qin ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Current Density ◽  
Growth Process ◽  
Solid Electrolyte Interface ◽  
Electrolyte Interface ◽  
Lithium Deposition ◽  
Lithium Dendrite ◽  
Nucleation Growth

The influence of current density and capacity on lithium deposition was investigated, including the nucleation, growth and SEI evolution processes.

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.

Fluoride‐Rich Solid‐Electrolyte‐Interface Enabling Stable Sodium Metal Batteries in High‐Safe Electrolytes

2021 ◽  
pp. 2103522
Author(s):  
Xuyang Liu ◽  
Xueying Zheng ◽  
Yiming Dai ◽  
Wangyan Wu ◽  
Yangyang Huang ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interface ◽  
Sodium Metal ◽  
Electrolyte Interface
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