A copper-clad lithiophilic current collector for dendrite-free lithium metal anodes

2020 ◽  
Vol 8 (4) ◽  
pp. 1911-1919 ◽  
Author(s):  
Ke Chen ◽  
Rajesh Pathak ◽  
Ashim Gurung ◽  
Khan M. Reza ◽  
Nabin Ghimire ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Current Collector ◽  
Lithium Metal ◽  
Lithium Metal Anodes ◽  
Metal Anodes ◽  
High Coulombic Efficiency

A flexible copper-clad lithiophilic current collector was designed for high coulombic efficiency dendrite-free Li metal anodes.

Lithiophilic Co/Co4N nanoparticles embedded in hollow N-doped carbon nanocubes stabilizing lithium metal anodes for Li–air batteries

2018 ◽  
Vol 6 (44) ◽  
pp. 22096-22105 ◽  
Author(s):  
Ziyang Guo ◽  
Fengmei Wang ◽  
Zijian Li ◽  
Yu Yang ◽  
Andebet Gedamu Tamirat ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Carbon Electrode ◽  
Lithium Metal ◽  
Lithium Metal Anodes ◽  
Long Life ◽  
Metal Anodes ◽  
High Coulombic Efficiency

A lithiophilic Co/Co4N-N-doped carbon electrode displays a high coulombic efficiency (98.5%) and dendrite-free morphology for long-life Li–air batteries.

A corrosion-resistant current collector for lithium metal anodes

2019 ◽  
Vol 18 ◽  
pp. 199-204 ◽  
Author(s):  
Xinyue Zhang ◽  
Aoxuan Wang ◽  
Ruijing Lv ◽  
Jiayan Luo
Keyword(s):  
Current Collector ◽  
Lithium Metal ◽  
Corrosion Resistant ◽  
Lithium Metal Anodes ◽  
Metal Anodes

scholarly journals Leveraging Cation Identity to Engineer Solid Electrolyte Interphases for Rechargeable Lithium Metal Anodes

2020 ◽  
Author(s):  
Richard May ◽  
Yumin Zhang ◽  
Steven R. Denny ◽  
Venkatasubramanian Viswanathan ◽  
Lauren Marbella
Keyword(s):  
Solid Electrolyte ◽  
Density Functional ◽  
Coulombic Efficiency ◽  
Ethylene Carbonate ◽  
Solid Electrolyte Interphase ◽  
Spectroscopic Characterization ◽  
Lithium Metal ◽  
Lithium Metal Anodes ◽  
The Impact ◽  
Metal Anodes

<p>Lithium metal anodes enable substantially higher energy density than current technologies for Li batteries. However, rechargeable Li metal anodes suffer from low Coulombic efficiency (loss of electrochemically active Li), leading to poor cycle life and safety. Engineering the electrolyte formulation to form a stable, well-functioning solid electrolyte interphase (SEI) is a promising approach to improving these performance figures of merit. While design rules have been established for selecting electrolyte solvents and salt anions to establish a more robust SEI, the impact of altering cation identity is not well understood. In this work, we demonstrate that alkali metal additives (here, K<sup>+</sup>) alter SEI composition and thickness. Through post-mortem elemental analyses, we show that K<sup>+</sup> ions do not directly participate in metal electrodeposition, but rather modify the chemical and electrochemical reactivity of the electrode-electrolyte interface. Through a combination of quantitative nuclear magnetic resonance (NMR) spectroscopic characterization and density functional theory (DFT) simulations, we show that decomposition of electrolyte solvent molecules, ethylene carbonate (EC) and dimethyl carbonate (DMC), at the lithium metal surface is suppressed in the presence of a K<sup>+</sup> additive. We attribute this to K<sup>+</sup> being a softer cation compared to Li<sup>+</sup>, leading to preferred pair formation between K<sup>+</sup> and the soft base carbonates, and thus increased salt-solvent coordination. Electrolyte cation engineering is an underexplored strategy to control the SEI, and we believe that the mechanistic understanding and insight developed in this work will spur further investigation of this promising approach.</p>

scholarly journals Favorable Lithium Nucleation on Lithiophilic Framework Porphyrin for Dendrite-Free Lithium Metal Anodes

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Bo-Quan Li ◽  
Xiao-Ru Chen ◽  
Xiang Chen ◽  
Chang-Xin Zhao ◽  
Rui Zhang ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Dendrite Growth ◽  
Homogeneous Distribution ◽  
Electrochemical Performances ◽  
Lithium Metal ◽  
Lithium Metal Batteries ◽  
Host Materials ◽  
Lithium Metal Anodes ◽  
Excellent Stability ◽  
Metal Anodes

Lithium metal constitutes promising anode materials but suffers from dendrite growth. Lithiophilic host materials are highly considered for achieving uniform lithium deposition. Precise construction of lithiophilic sites with desired structure and homogeneous distribution significantly promotes the lithiophilicity of lithium hosts but remains a great challenge. In this contribution, a framework porphyrin (POF) material with precisely constructed lithiophilic sites in regard to chemical structure and geometric position is employed as the lithium host to address the above issues for dendrite-free lithium metal anodes. The extraordinary lithiophilicity of POF even beyond lithium nuclei validated by DFT simulations and lithium nucleation overpotentials affords a novel mechanism of favorable lithium nucleation to facilitate uniform nucleation and inhibit dendrite growth. Consequently, POF-based anodes demonstrate superior electrochemical performances with high Coulombic efficiency over 98%, reduced average voltage hysteresis, and excellent stability for 300 cycles at 1.0 mA cm−2, 1.0 mAh cm−2 superior to both Cu and graphene anodes. The favorable lithium nucleation mechanism on POF materials inspires further investigation of lithiophilic electrochemistry and development of lithium metal batteries.

scholarly journals PVDF-supported graphene foam as a robust current collector for lithium metal anodes

RSC Advances ◽  
2020 ◽  
Vol 10 (35) ◽  
pp. 20915-20920
Author(s):  
Liurong Shi ◽  
Zhipeng Hu ◽  
Ye Hong
Keyword(s):  
Current Collector ◽  
Lithium Metal ◽  
Graphene Foam ◽  
Metal Anode ◽  
Lithium Metal Anode ◽  
Lithium Metal Anodes ◽  
Cycling Life ◽  
Metal Anodes

A robust lithium metal anode comprising of PSGF current collector showing long cycling life.

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