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 coating of lithiophilic interphase on a biporous Cu scaffold with vertical microchannels for dendrite-free Li metal batteries

2021 ◽  
Author(s):  
Li-Min Wang ◽  
Xiaokuan Ban ◽  
Zongzi Jin ◽  
Ranran Peng ◽  
Chusheng Chen ◽  
...  
Keyword(s):  
Volume Change ◽  
Coulombic Efficiency ◽  
Dendrite Growth ◽  
Porous Scaffolds ◽  
Effective Strategy ◽  
Practical Application ◽  
Metal Anode ◽  
Li Metal Anode ◽  
In Situ Coating

Severe dendrite growth, low Coulombic efficiency and huge volume change have impeded the practical application of Li metal anode, and the construction of porous scaffolds is an effective strategy to...

Depressing the irreversible reactions on a three-dimensional interface towards a high-areal capacity lithium metal anode

2019 ◽  
Vol 7 (11) ◽  
pp. 6267-6274 ◽  
Author(s):  
Wei Deng ◽  
Shanshan Liang ◽  
Xufeng Zhou ◽  
Fei Zhao ◽  
Wenhua Zhu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Lithium Metal ◽  
Current Collectors ◽  
Metal Anode ◽  
Irreversible Reaction ◽  
Conductive Coating ◽  
Lithium Metal Anode ◽  
Li Metal Anode ◽  
Areal Capacity

An ultrathin and conformal ion conductive coating is realized on 3D current collectors for preventing the irreversible reaction between the electrolyte and Li metal, which has been confirmed by in situ optical observation. At the high areal capacity of 10 mA h cm−2 for the Li metal anode, a stable CE of 98.9% for 800 h can be achieved.

In Situ Formed Flexible Three-Dimensional Honeycomb-like Film for LiF/Li3N-riched Hybrid Organic-Inorganic Interphase on Li Metal Anode

2021 ◽  
Author(s):  
Daobin Mu ◽  
Chengwei Ma ◽  
Ge Mu ◽  
Haijian Lv ◽  
Chengcai Liu ◽  
...  
Keyword(s):  
Solid Electrolyte Interphase ◽  
Three Dimensional ◽  
High Energy ◽  
Liquid Electrolyte ◽  
Lithium Metal ◽  
Metal Anode ◽  
Lithium Metal Anode ◽  
Li Metal Anode ◽  
Storage Batteries

The solid-electrolyte interphase (SEI) plays an important role in stabilizing lithium metal anode for high-energy storage batteries. However, the SEI between lithium metal anode and liquid electrolyte is usually unstable...

In Situ Formation of Circular and Branched Oligomers in Localized High Concentration Electrolyte at Lithium−metal Solid Electrolyte Interphase: A Hybrid ab initio and Reactive Molecular Dynamics

2021 ◽  
Author(s):  
Yue Liu ◽  
Qintao Sun ◽  
Peiping Yu ◽  
Bingyun Ma ◽  
Hao Yang ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Lithium Metal ◽  
High Concentration ◽  
Metal Anode ◽  
Reactive Molecular Dynamics ◽  
Li Metal Anode ◽  
In Situ Formation

Developing advanced electrolytes has been considered as a promising approach to stabilize lithium (Li) metal anode via the formation of stable solid electrolyte interphase (SEI) that can protect Li anode...

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.

scholarly journals Improving Cyclability of Lithium Metal Anode via Constructing Atomic Interlamellar Ion Channel for Lithium Sulfur Battery

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Mao Yang ◽  
Nan Jue ◽  
Yuanfu Chen ◽  
Yong Wang
Keyword(s):  
Ion Channel ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Absorption Capacity ◽  
Lithium Metal ◽  
Metal Anode ◽  
Lithium Metal Anode ◽  
Li Ion ◽  
Sulfur Battery ◽  
Rapid Transfer

AbstractUniform migration of lithium (Li) ions between the separator and the lithium anode is critical for achieving good quality Li deposition, which is of much significance for lithium metal battery operation, especially for Li–sulfur (Li–S) batteries. Commercial separators such as polypropylene or polyethylene can be prepared by wet or dry processes, but they can indeed cause plentiful porosities, resulting in the uneven Li ion stripping/plating and finally the formation of Li dendrites. Thence, we constructed an atomic interlamellar ion channel by introducing the layered montmorillonite on the surface of the separator to guide Li ion flux and achieved stable Li deposition. The atomic interlamellar ion channel with a spacing of 1.4 nm showed strong absorption capacity for electrolytes and reserved capacity for Li ions, thus promoting rapid transfer of Li ions and resulting in even Li ion deposition at the anode. When assembled with the proposed separator, the Coulombic efficiency of Li||Cu batteries was 98.2% after 200 cycles and stable plating/stripping even after 800 h was achieved for the Li||Li symmetric batteries. Importantly, the proposed separator allows 140% specific capacity increase after 190 cycles as employing the Li–S batteries.

Boron additive passivated carbonate electrolytes for stable cycling of 5 V lithium–metal batteries

2019 ◽  
Vol 7 (2) ◽  
pp. 594-602 ◽  
Author(s):  
Hongyun Yue ◽  
Yange Yang ◽  
Yan Xiao ◽  
Zhiyuan Dong ◽  
Shuguo Cheng ◽  
...  
Keyword(s):  
High Voltage ◽  
Dendrite Growth ◽  
Lithium Metal ◽  
Metal Anode ◽  
Lithium Metal Batteries ◽  
Li Metal Anode ◽  
Oxidation Loss

The limitation of a high-voltage lithium (Li) metal battery lies in the absence of a robust electrolyte that can endure oxidation loss at a high-voltage cathode and suppress the dendrite growth at a Li metal anode.

Stabilize lithium metal anode through in-situ forming a multi-component composite protective layer

2021 ◽  
pp. 129911
Author(s):  
Saisai Li ◽  
Yun Huang ◽  
Wenhao Ren ◽  
Xing Li ◽  
Mingshan Wang ◽  
...  
Keyword(s):  
Protective Layer ◽  
Lithium Metal ◽  
Metal Anode ◽  
In Situ Forming ◽  
Lithium Metal Anode

A multifunctional artificial protective layer for producing an ultra-stable lithium metal anode in a commercial carbonate electrolyte

2021 ◽  
Vol 9 (12) ◽  
pp. 7667-7674
Author(s):  
Song Li ◽  
Xian-Shu Wang ◽  
Qi-Dong Li ◽  
Qi Liu ◽  
Pei-Ran Shi ◽  
...  
Keyword(s):  
Protective Layer ◽  
Stable Cycle ◽  
Lithium Metal ◽  
Lithium Ions ◽  
Metal Anode ◽  
Lithium Metal Anode

A multifunctional artificial protective layer is in situ fabricated on the surface of Li anode, which facilitates stable cycle of Li anode in carbonate electrolyte by forming a unique SEI and inducing homogeneous deposition of lithium ions.

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