A highly reversible sodium metal anode by mitigating electrodeposition overpotential

2021 ◽  
Author(s):  
Pan Xu ◽  
Xin Li ◽  
Mei-Yan Yan ◽  
Hong-Bin Ni ◽  
Hai-Hong Huang ◽  
...  
Keyword(s):  
Tip Growth ◽  
Metal Anode ◽  
Sodium Metal ◽  
Nucleation Overpotential

Herein, we successfully introduce a sodiophilic Na–Cu–P composites via in situ alloying reaction, which can greatly mitigate the tip/growth/nucleation overpotential during Na deposition, thereby to realize a stable Na plating/stripping behaviors.

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 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 AFM of interfacial evolution at magnesium metal anode

2021 ◽  
Vol 896 ◽  
pp. 115301
Author(s):  
Xin-Cheng Hu ◽  
Shuang-Yan Lang ◽  
Yang Shi ◽  
Rui Wen ◽  
Li-Jun Wan
Keyword(s):  
Magnesium Metal ◽  
Metal Anode ◽  
Interfacial Evolution

Single Cobalt Atoms Decorated N‐doped Carbon Polyhedron Enabled Dendrite‐Free Sodium Metal Anode

Small Methods ◽  
2021 ◽  
pp. 2100833
Author(s):  
Yijuan Li ◽  
Pan Xu ◽  
Jirong Mou ◽  
Shoufeng Xue ◽  
Shaoming Huang ◽  
...  
Keyword(s):  
Metal Anode ◽  
Sodium Metal

Ion–Solvent Complexes Promote Gas Evolution from Electrolytes on a Sodium Metal Anode

2017 ◽  
Vol 130 (3) ◽  
pp. 742-745 ◽  
Author(s):  
Xiang Chen ◽  
Xin Shen ◽  
Bo Li ◽  
Hong‐Jie Peng ◽  
Xin‐Bing Cheng ◽  
...  
Keyword(s):  
Gas Evolution ◽  
Metal Anode ◽  
Sodium Metal

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

scholarly journals Realizing high-power and high-capacity zinc/sodium metal anodes through interfacial chemistry regulation

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhen Hou ◽  
Yao Gao ◽  
Hong Tan ◽  
Biao Zhang
Keyword(s):  
High Power ◽  
High Capacity ◽  
Interfacial Chemistry ◽  
Zinc Deposition ◽  
Metal Anode ◽  
Face To Face ◽  
Sodium Metal ◽  
Current Densities ◽  
Superior Cycling Stability ◽  
Metal Anodes

AbstractStable plating/stripping of metal electrodes under high power and high capacity remains a great challenge. Tailoring the deposition behavior on the substrate could partly resolve dendrites’ formation, but it usually works only under low current densities and limited capacities. Here we turn to regulate the separator’s interfacial chemistry through tin coating with decent conductivity and excellent zincophilicity. The former homogenizes the electric field distribution for smooth zinc metal on the substrate, while the latter enables the concurrent zinc deposition on the separator with a face-to-face growth. Consequently, dendrite-free zinc morphologies and superior cycling stability are achieved at simultaneous high current densities and large cycling capacities (1000 h at 5 mA/cm2 for 5 mAh/cm2 and 500 h at 10 mA/cm2 for 10 mAh/cm2). Furthermore, the concept could be readily extended to sodium metal anodes, demonstrating the interfacial chemistry regulation of separator is a promising route to circumvent the metal anode challenges.

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