Measuring the Coulombic Efficiency of Lithium Metal Cycling in Anode-Free Lithium Metal Batteries

2018 ◽  
Vol 165 (14) ◽  
pp. A3321-A3325 ◽  
Author(s):  
Matthew Genovese ◽  
A. J. Louli ◽  
Rochelle Weber ◽  
Sam Hames ◽  
J. R. Dahn
Keyword(s):  
Coulombic Efficiency ◽  
Lithium Metal ◽  
Metal Cycling ◽  
Lithium Metal Batteries

scholarly journals Decoupling the origins of irreversible coulombic efficiency in anode-free lithium metal batteries

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Chen-Jui Huang ◽  
Balamurugan Thirumalraj ◽  
Hsien-Chu Tao ◽  
Kassie Nigus Shitaw ◽  
Hogiartha Sutiono ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Rate Capability ◽  
Reversible Capacity ◽  
Data Interpretation ◽  
Lithium Metal ◽  
Safety Hazards ◽  
Practical Applications ◽  
Lithium Metal Batteries ◽  
Metallic Lithium ◽  
Other Information

AbstractAnode-free lithium metal batteries are the most promising candidate to outperform lithium metal batteries due to higher energy density and reduced safety hazards with the absence of metallic lithium anode during initial cell fabrication. In general, researchers report capacity retention, reversible capacity, or rate capability of the cells to study the electrochemical performance of anode-free lithium metal batteries. However, evaluating the behavior of batteries from limited aspects may easily overlook other information hidden deep inside the meretricious results or even lead to misguided data interpretation. In this work, we present an integrated protocol combining different types of cell configuration to determine various sources of irreversible coulombic efficiency in anode-free lithium metal cells. The decrypted information from the protocol provides an insightful understanding of the behaviors of LMBs and AFLMBs, which promotes their development for practical applications.

Unfolding the Hidden Message of Anode-Free Lithium Metal Battery

2020 ◽  
Author(s):  
Chen-Jui Huang ◽  
Balamurugan Thirumalraj ◽  
Hsien-Chu Tao ◽  
Kassie Nigus Shitaw ◽  
Tesfaye Teka Hagos ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Rate Capability ◽  
Reversible Capacity ◽  
Data Interpretation ◽  
Lithium Metal ◽  
Practical Applications ◽  
Lithium Metal Batteries ◽  
Cathode Degradation ◽  
Other Information ◽  
First Time

Abstract Lithium metal batteries (LMBs) have been revisited and gained great attention due to significantly mitigated formation of Li dendrite in the past decade. Recently, anode-free lithium metal batteries (AFLMBs) are proposed and have been studied intensively to potentially outperform LMBs due to higher energy density and reduced safety hazards since the absence of Li metal during the fabrication process of the cell. In general, researchers compare capacity retention, reversible capacity, or rate capability of the cells to study the electrochemical performance of batteries. However, evaluating the behavior of batteries from limited aspects would easily overlook other information hidden deep inside the meretricious results or even lead to misguided data interpretation. In this work, an integrated protocol combining different types of cell configuration is proposed and validated for the first time to unravel the concealed messages in LMBs and AFLMBs. Irreversible coulombic efficiency (irr-CE) from various contributions including reductive electrolyte decomposition, dead Li formation, 1st intrinsic irreversible capacity of a cathode, and the subsequent irreversible reactions at cathode containing oxidative electrolyte decomposition and cathode degradation upon cycling are successfully determined separately by the integrated protocol for the first time. The decrypted information obtained from the proposed protocol provides an insightful understanding of behaviors of LMBs and AFLMBs, which promotes their development for practical applications.

Understanding and applying coulombic efficiency in lithium metal batteries

Nature Energy ◽  
2020 ◽  
Vol 5 (8) ◽  
pp. 561-568 ◽  
Author(s):  
Jie Xiao ◽  
Qiuyan Li ◽  
Yujing Bi ◽  
Mei Cai ◽  
Bruce Dunn ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Lithium Metal ◽  
Lithium Metal Batteries

scholarly journals Surface-Functionalized Separator for Stable and Reliable Lithium Metal Batteries: A Review

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2275
Author(s):  
Patrick Joohyun Kim
Keyword(s):  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Rechargeable Batteries ◽  
Lithium Metal ◽  
Standard Potential ◽  
Coating Materials ◽  
General Guideline ◽  
Lithium Metal Batteries ◽  
High Theoretical Capacity ◽  
Significant Attention

Metallic Li has caught the attention of researchers studying future anodes for next-generation batteries, owing to its attractive properties: high theoretical capacity, highly negative standard potential, and very low density. However, inevitable issues, such as inhomogeneous Li deposition/dissolution and poor Coulombic efficiency, hinder the pragmatic use of Li anodes for commercial rechargeable batteries. As one of viable strategies, the surface functionalization of polymer separators has recently drawn significant attention from industries and academics to tackle the inherent issues of metallic Li anodes. In this article, separator-coating materials are classified into five or six categories to give a general guideline for fabricating functional separators compatible with post-lithium-ion batteries. The overall research trends and outlook for surface-functionalized separators are reviewed.

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.

Stability of polymeric separators in lithium metal batteries in a low voltage environment

2018 ◽  
Vol 6 (12) ◽  
pp. 5006-5015 ◽  
Author(s):  
Xing Li ◽  
Jinhui Tao ◽  
Dehong Hu ◽  
Mark H. Engelhard ◽  
Wengao Zhao ◽  
...  
Keyword(s):  
Low Voltage ◽  
Coulombic Efficiency ◽  
Cycling Stability ◽  
Lithium Metal ◽  
Metal Anode ◽  
Lithium Metal Batteries ◽  
Lithium Metal Anode

Separators can largely affect the coulombic efficiency and cycling stability of lithium metal anode, especially when using the LiPF6 electrolyte.

scholarly journals Immunizing lithium metal anodes against dendrite growth using protein molecules to achieve high energy batteries

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Tianyi Wang ◽  
Yanbin Li ◽  
Jinqiang Zhang ◽  
Kang Yan ◽  
Pauline Jaumaux ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
High Energy ◽  
High Energy Density ◽  
Lithium Metal ◽  
Practical Applications ◽  
Lithium Metal Batteries ◽  
Protein Molecules ◽  
Lithium Dendrites ◽  
Lithium Metal Anodes ◽  
Metal Anodes

Abstract The practical applications of lithium metal anodes in high-energy-density lithium metal batteries have been hindered by their formation and growth of lithium dendrites. Herein, we discover that certain protein could efficiently prevent and eliminate the growth of wispy lithium dendrites, leading to long cycle life and high Coulombic efficiency of lithium metal anodes. We contend that the protein molecules function as a “self-defense” agent, mitigating the formation of lithium embryos, thus mimicking natural, pathological immunization mechanisms. When added into the electrolyte, protein molecules are automatically adsorbed on the surface of lithium metal anodes, particularly on the tips of lithium buds, through spatial conformation and secondary structure transformation from α-helix to β-sheets. This effectively changes the electric field distribution around the tips of lithium buds and results in homogeneous plating and stripping of lithium metal anodes. Furthermore, we develop a slow sustained-release strategy to overcome the limited dispersibility of protein in the ether-based electrolyte and achieve a remarkably enhanced cycling performance of more than 2000 cycles for lithium metal batteries.

Cautious interpretation of coulombic efficiency (CE) in lithium metal batteries

2021 ◽  
Vol 56 ◽  
pp. 34-36
Author(s):  
Fu Sun ◽  
Dong Zhou ◽  
Xiaogang Wang ◽  
Ingo Manke ◽  
Libao Chen
Keyword(s):  
Coulombic Efficiency ◽  
Lithium Metal ◽  
Lithium Metal Batteries ◽  
Cautious Interpretation

Oxygen-defect-rich coating with nanoporous texture as both anode host and artificial SEI for dendrite-mitigated lithium-metal batteries

2020 ◽  
Author(s):  
Qingping Wu ◽  
Zhenguo Yao ◽  
Aochen Du ◽  
Han Wu ◽  
Minsong Huang ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Coulombic Efficiency ◽  
Solid Electrolyte Interphase ◽  
Oxygen Defect ◽  
Lithium Metal ◽  
Long Period ◽  
Lithium Metal Batteries ◽  
High Coulombic Efficiency

The fragility of natural solid electrolyte interphase (SEI) and deformability of naked Li anode cannot meet the requirements on high coulombic efficiency (CE) and long-period cycling for Li metal batteries...

scholarly journals A Review of Functional Separators for Lithium Metal Battery Applications

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4625
Author(s):  
Jooyoung Jang ◽  
Jiwoong Oh ◽  
Hyebin Jeong ◽  
Woosuk Kang ◽  
Changshin Jo
Keyword(s):  
Storage Systems ◽  
Coulombic Efficiency ◽  
High Reactivity ◽  
Lithium Metal ◽  
Future Prospects ◽  
Safety Hazards ◽  
Lithium Metal Batteries ◽  
Reaction Potential ◽  
High Theoretical Capacity ◽  
Lithium Metal Battery

Lithium metal batteries are considered “rough diamonds” in electrochemical energy storage systems. Li-metal anodes have the versatile advantages of high theoretical capacity, low density, and low reaction potential, making them feasible candidates for next-generation battery applications. However, unsolved problems, such as dendritic growths, high reactivity of Li-metal, low Coulombic efficiency, and safety hazards, still exist and hamper the improvement of cell performance and reliability. The use of functional separators is one of the technologies that can contribute to solving these problems. Recently, functional separators have been actively studied and developed. In this paper, we summarize trends in the research on separators and predict future prospects.

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