In Situ Optical Investigations of Lithium Depositions on Pristine and Aged Lithium Metal Electrodes

2021 ◽  
Vol 168 (2) ◽  
pp. 020510
Author(s):  
Hannes Kühnle ◽  
Edwin Knobbe ◽  
Egbert Figgemeier
Keyword(s):  
Lithium Metal ◽  
Metal Electrodes

scholarly journals Investigating the evolving microstructure of lithium metal electrodes in 3D using X-ray computed tomography

2017 ◽  
Vol 19 (33) ◽  
pp. 22111-22120 ◽  
Author(s):  
O. O. Taiwo ◽  
D. P. Finegan ◽  
J. M. Paz-Garcia ◽  
D. S. Eastwood ◽  
A. J. Bodey ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Lithium Batteries ◽  
Lithium Metal ◽  
Metal Electrodes ◽  
X Ray ◽  
X Ray Computed ◽  
Insight Into

The growth of dendritic and mossy deposits through the separator of lithium batteries can result in battery short circuiting and failure. In situ X-ray CT provides insight into evolution of lithium-metal electrodes during battery operation.

scholarly journals Artificial dual solid-electrolyte interfaces based on in situ organothiol transformation in lithium sulfur battery

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Wei Guo ◽  
Wanying Zhang ◽  
Yubing Si ◽  
Donghai Wang ◽  
Yongzhu Fu ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Interface Reaction ◽  
Interfacial Instability ◽  
Anode Surface ◽  
Commercial Application ◽  
Lithium Metal ◽  
Metal Anode ◽  
Lithium Metal Anode ◽  
Lithium Sulfur

AbstractThe interfacial instability of the lithium-metal anode and shuttling of lithium polysulfides in lithium-sulfur (Li-S) batteries hinder the commercial application. Herein, we report a bifunctional electrolyte additive, i.e., 1,3,5-benzenetrithiol (BTT), which is used to construct solid-electrolyte interfaces (SEIs) on both electrodes from in situ organothiol transformation. BTT reacts with lithium metal to form lithium 1,3,5-benzenetrithiolate depositing on the anode surface, enabling reversible lithium deposition/stripping. BTT also reacts with sulfur to form an oligomer/polymer SEI covering the cathode surface, reducing the dissolution and shuttling of lithium polysulfides. The Li–S cell with BTT delivers a specific discharge capacity of 1,239 mAh g−1 (based on sulfur), and high cycling stability of over 300 cycles at 1C rate. A Li–S pouch cell with BTT is also evaluated to prove the concept. This study constructs an ingenious interface reaction based on bond chemistry, aiming to solve the inherent problems of Li–S batteries.

Cyano-reinforced in-situ polymer electrolyte enabling long-life cycling for high-voltage lithium metal batteries

2021 ◽  
Vol 37 ◽  
pp. 215-223
Author(s):  
Zhaolin Lv ◽  
Qian Zhou ◽  
Shu Zhang ◽  
Shanmu Dong ◽  
Qinglei Wang ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
High Voltage ◽  
Lithium Metal ◽  
Lithium Metal Batteries ◽  
Long Life

Flexible lithium metal capacitors enabled by an in situ prepared gel polymer electrolyte

2021 ◽  
Author(s):  
Qizhi Zhong ◽  
Bao Liu ◽  
Bingjun Yang ◽  
Yali Li ◽  
Junshuai Li ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
Gel Polymer Electrolyte ◽  
Lithium Metal

scholarly journals Dendrite-Free and Stable Lithium Metal Battery Achieved by a Model of Stepwise Lithium Deposition and Stripping

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Tiancun Liu ◽  
Jinlong Wang ◽  
Yi Xu ◽  
Yifan Zhang ◽  
Yong Wang
Keyword(s):  
Reduction Method ◽  
Coulombic Efficiency ◽  
List Type ◽  
Lithium Metal ◽  
Metal Anode ◽  
In Situ Raman ◽  
Unique Model ◽  
Li Metal Anode ◽  
Pyridinic N

Highlights A facile method is adopted to obtain cucumber-like lithiophilic composite skeleton. Massive lithiophilic sites in cucumber-like lithiophilic composite skeleton can promote and guide uniform Li depositions. A unique model of stepwise Li deposition and stripping is determined. Abstract The uncontrolled formation of lithium (Li) dendrites and the unnecessary consumption of electrolyte during the Li plating/stripping process have been major obstacles in developing safe and stable Li metal batteries. Herein, we report a cucumber-like lithiophilic composite skeleton (CLCS) fabricated through a facile oxidation-immersion-reduction method. The stepwise Li deposition and stripping, determined using in situ Raman spectra during the galvanostatic Li charging/discharging process, promote the formation of a dendrite-free Li metal anode. Furthermore, numerous pyridinic N, pyrrolic N, and CuxN sites with excellent lithiophilicity work synergistically to distribute Li ions and suppress the formation of Li dendrites. Owing to these advantages, cells based on CLCS exhibit a high Coulombic efficiency of 97.3% for 700 cycles and an improved lifespan of 2000 h for symmetric cells. The full cells assembled with LiFePO4 (LFP), SeS2 cathodes and CLCS@Li anodes demonstrate high capacities of 110.1 mAh g−1 after 600 cycles at 0.2 A g−1 in CLCS@Li|LFP and 491.8 mAh g−1 after 500 cycles at 1 A g−1 in CLCS@Li|SeS2. The unique design of CLCS may accelerate the application of Li metal anodes in commercial Li metal batteries.

In Situ Curing Technology for Dual Ceramic Composed by Organic–Inorganic Functional Polymer Gel Electrolyte for Dendritic‐Free and Robust Lithium–Metal Batteries

2020 ◽  
Vol 7 (20) ◽  
pp. 2000830
Author(s):  
Sajid Hussain Siyal ◽  
Muhammad Sufyan Javed ◽  
Ashique Hussain Jatoi ◽  
Jin‐Le Lan ◽  
Yunhua Yu ◽  
...  
Keyword(s):  
Gel Electrolyte ◽  
Polymer Gel ◽  
Lithium Metal ◽  
Polymer Gel Electrolyte ◽  
Functional Polymer ◽  
Lithium Metal Batteries

scholarly journals The Importance of Interphases in Energy Storage Devices: Methods and Strategies to Investigate and Control Interfacial Processes

Physchem ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 26-44
Author(s):  
Chiara Ferrara ◽  
Riccardo Ruffo ◽  
Piercarlo Mustarelli
Keyword(s):  
Energy Storage ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
Lithium Metal ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Lithium Metal Batteries ◽  
And Control ◽  
Near Future

Extended interphases are playing an increasingly important role in electrochemical energy storage devices and, in particular, in lithium-ion and lithium metal batteries. With this in mind we initially address the differences between the concepts of interface and interphase. After that, we discuss in detail the mechanisms of solid electrolyte interphase (SEI) formation in Li-ion batteries. Then, we analyze the methods for interphase characterization, with emphasis put on in-situ and operando approaches. Finally, we look at the near future by addressing the issues underlying the lithium metal/electrolyte interface, and the emerging role played by the cathode electrolyte interphase when high voltage materials are employed.

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