scholarly journals Beyond the Polysulfide Shuttle and Lithium Dendrite Formation: Addressing the Sluggish Sulfur Redox Kinetics for Practical High‐Energy Li‐S Batteries

2020 ◽  
Vol 132 (40) ◽  
pp. 17787-17793
Author(s):  
Chen Zhao ◽  
Gui‐Liang Xu ◽  
Tianshou Zhao ◽  
Khalil Amine
Keyword(s):  
High Energy ◽  
Dendrite Formation ◽  
Redox Kinetics ◽  
Lithium Dendrite ◽  
Polysulfide Shuttle

Selenium enriched hybrid metal chalcogenides with enhanced redox kinetics for high-energy density supercapacitors

2021 ◽  
Vol 414 ◽  
pp. 128924
Author(s):  
Ramu Manikandan ◽  
C. Justin Raj ◽  
Goli Nagaraju ◽  
Rajavel Velayutham ◽  
Simon E. Moulton ◽  
...  
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Metal Chalcogenides ◽  
Redox Kinetics

Multifunctional SnSe-C composite modified 3D scaffolds to regulate lithium nucleation and fast transport for dendrite-free lithium metal anode

2021 ◽  
Author(s):  
Naiqing Zhang ◽  
Xiaojie Shen ◽  
Guangyu Zhao ◽  
Xianbo Yu ◽  
Huihuang Huang ◽  
...  
Keyword(s):  
High Energy ◽  
Lithium Metal ◽  
3D Scaffolds ◽  
Metal Anode ◽  
Lithium Metal Anode ◽  
Fast Transport ◽  
Lithium Dendrite ◽  
Storage Batteries ◽  
Growth Limits ◽  
High Energy Storage

Undesirable lithium dendrite growth limits the application of lithium metal anode in high-energy storage batteries. Here, multifunctional SnSe-C composite modified 3D scaffolds is constructed to achieve dendrite-free lithium deposition. During...

scholarly journals Avoiding Dendrite Formation by Confining Lithium Deposition Underneath Li-Sn Coatings

2020 ◽  
Author(s):  
Grace Whang ◽  
Qizhang Yan ◽  
Da Li ◽  
Ziyang Wei ◽  
Danielle M. Butts ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Research Direction ◽  
Exchange Current ◽  
Atomic Scale ◽  
Interfacial Layers ◽  
Dendrite Formation ◽  
Lithium Deposition ◽  
Lithium Dendrite

<p>The use of interfacial layers to stabilize the lithium surface is a popular research direction for improving the morphology of deposited lithium and suppressing lithium dendrite formation. This work considers a different approach to controlling dendrite formation where lithium is plated underneath an interfacial coating. In the present research, a Li-Sn intermetallic was chosen as a model system due to its lithium-rich intermetallic phases and high Li diffusivity. These coatings also exhibit a significantly higher Li exchange current than bare Li thus leading to better charge transfer kinetics. The exchange current is instrumental in determining whether lithium deposition occurs above or below the Li-Sn coating. High-resolution transmission electron microscopy and cryogenic focused ion beam scanning electron microscopy were used to identify the features associated with Li deposition. Atomic scale simulations provide insight as to the adsorption energies determining the deposition of lithium below the Li-Sn coating. </p>

Lithium Dendrite Growth Process and Research Progress of its Inhibition Methods

2021 ◽  
Vol 1027 ◽  
pp. 42-47
Author(s):  
Hao Ran Zheng
Keyword(s):  
Growth Process ◽  
Specific Capacity ◽  
Development Trend ◽  
High Energy ◽  
High Energy Density ◽  
Research Progress ◽  
Future Research ◽  
Battery Life ◽  
Lithium Dendrites ◽  
Lithium Dendrite

Metal lithium anodes, with extremely high specific capacity, low density, and lowest potential, are considered to be the most promising anode materials for next-generation high-energy density batteries. However, in the process of repeated plating and stripping of lithium, lithium dendrites are easily grown on the surface of the metal lithium anode, which greatly reduces the capacity of the battery, even causes hidden safety risks and shortens the battery life. This paper reviews the modification methods of lithium anodes based on the growth process of lithium dendrites, and introduces several current modification methods, including electrolyte additives, artificial SEI and new structure of lithium anodes. Finally, the future research direction and development trend of metal lithium anodes are prospected.

scholarly journals Dendrite-Free Lithium Electrodeposition Enabled by 3D Porous Lithiophilic Host toward Stable Lithium Metal Anodes

2021 ◽  
Author(s):  
Linghong Xu ◽  
Zhihao Yu ◽  
Junrong Zheng
Keyword(s):  
Coulombic Efficiency ◽  
Short Circuit ◽  
3D Structure ◽  
Three Dimensional ◽  
Current Collector ◽  
High Energy ◽  
Lithium Metal ◽  
Lithium Storage ◽  
Practical Utilization ◽  
Lithium Dendrite

Abstract Lithium metal is a promising anode utilized in cutting-edge high-energy batteries owing to the low density, low electrochemical potential, and super high theoretical capacity. Unfortunately, continuous uncontrollable lithium dendrite growth and ‘dead’ lithium result in capacity decay, low coulombic efficiency, and short circuit, severely hindering the practical utilization of lithium anode. Herein, we propose a three-dimensional porous lithiophilic current collector for lithium storage. The conductive 3D structure constructed by carbon fiber (CF) can well accommodate the deposited lithium, eliminating volume change between the lithium depositing/stripping process. Moreover, the polydopamine (PDA) coating on the CF surface possesses a large number of polar groups, which can homogenize Li+ ions distribution and apply as the sites for lithium deposition, decreasing nucleation overpotential. As a result, under the 1 mA cm−2 current density, the PDA coated CF (PDA@CF) electrode exhibits high CE (∼98%) for 1000 cycles. Galvanostatic measurements demonstrate that the Li anode using PDA@CF achieves 1000 h cycling life under 1 mA cm−2 with a low overpotential (&lt;15 mV). The LiFePO4 full cell shows enhanced rate performance and stable long-term cycling.

scholarly journals Avoiding Dendrite Formation by Confining Lithium Deposition Underneath Li-Sn Coatings

2020 ◽  
Author(s):  
Grace Whang ◽  
Qizhang Yan ◽  
Da Li ◽  
Ziyang Wei ◽  
Danielle M. Butts ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Research Direction ◽  
Exchange Current ◽  
Atomic Scale ◽  
Interfacial Layers ◽  
Dendrite Formation ◽  
Lithium Deposition ◽  
Lithium Dendrite

<p>The use of interfacial layers to stabilize the lithium surface is a popular research direction for improving the morphology of deposited lithium and suppressing lithium dendrite formation. This work considers a different approach to controlling dendrite formation where lithium is plated underneath an interfacial coating. In the present research, a Li-Sn intermetallic was chosen as a model system due to its lithium-rich intermetallic phases and high Li diffusivity. These coatings also exhibit a significantly higher Li exchange current than bare Li thus leading to better charge transfer kinetics. The exchange current is instrumental in determining whether lithium deposition occurs above or below the Li-Sn coating. High-resolution transmission electron microscopy and cryogenic focused ion beam scanning electron microscopy were used to identify the features associated with Li deposition. Atomic scale simulations provide insight as to the adsorption energies determining the deposition of lithium below the Li-Sn coating. </p>

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