Self-Healing Nucleation Seeds Induced Long-Term Dendrite-Free Lithium Metal Anode

A gel–solid state polymer electrolyte has been used as the separator and an electrolyte for lithium oxygen batteries, which can not only avoid electrolyte evaporation but also protect the lithium metal anode during reactions over long-term cycling.

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Suppressing electrolyte-lithium metal reactivity via Li+-desolvation in uniform nano-porous separator

Nature Communications ◽

10.1038/s41467-021-27841-0 ◽

2022 ◽

Vol 13 (1) ◽

Author(s):

Li Sheng ◽

Qianqian Wang ◽

Xiang Liu ◽

Hao Cui ◽

Xiaolin Wang ◽

...

Keyword(s):

Electrochemical Reduction ◽

High Voltage ◽

Metal Electrode ◽

Dendrite Growth ◽

Lithium Metal ◽

Metal Anode ◽

Effective Suppression ◽

Lithium Metal Anode

AbstractLithium reactivity with electrolytes leads to their continuous consumption and dendrite growth, which constitute major obstacles to harnessing the tremendous energy of lithium-metal anode in a reversible manner. Considerable attention has been focused on inhibiting dendrite via interface and electrolyte engineering, while admitting electrolyte-lithium metal reactivity as a thermodynamic inevitability. Here, we report the effective suppression of such reactivity through a nano-porous separator. Calculation assisted by diversified characterizations reveals that the separator partially desolvates Li+ in confinement created by its uniform nanopores, and deactivates solvents for electrochemical reduction before Li0-deposition occurs. The consequence of such deactivation is realizing dendrite-free lithium-metal electrode, which even retaining its metallic lustre after long-term cycling in both Li-symmetric cell and high-voltage Li-metal battery with LiNi0.6Mn0.2Co0.2O2 as cathode. The discovery that a nano-structured separator alters both bulk and interfacial behaviors of electrolytes points us toward a new direction to harness lithium-metal as the most promising anode.

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Long-Term Stable Lithium Metal Anode in Highly Concentrated Sulfolane-Based Electrolytes with Ultrafine Porous Polyimide Separator

ACS Applied Materials & Interfaces ◽

10.1021/acsami.9b05257 ◽

2019 ◽

Vol 11 (29) ◽

pp. 25833-25843 ◽

Cited By ~ 11

Author(s):

Yuta Maeyoshi ◽

Dong Ding ◽

Masaaki Kubota ◽

Hiroshi Ueda ◽

Koji Abe ◽

...

Keyword(s):

Lithium Metal ◽

Metal Anode ◽

Lithium Metal Anode

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A Protective Layer for Lithium Metal Anode: Why and How

Small Methods ◽

10.1002/smtd.202001035 ◽

2021 ◽

pp. 2001035

Author(s):

Zhiyuan Han ◽

Chen Zhang ◽

Qiaowei Lin ◽

Yunbo Zhang ◽

Yaqian Deng ◽

...

Keyword(s):

Protective Layer ◽

Lithium Metal ◽

Metal Anode ◽

Lithium Metal Anode

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Self-Assembly Lightweight Honeycomb-Like Prussian Blue Analogue on Cu Foam for Lithium Metal Anode

ACS Applied Materials & Interfaces ◽

10.1021/acsami.1c04965 ◽

2021 ◽

Author(s):

Yifei Cai ◽

Bin Qin ◽

Jinghuang Lin ◽

Chun Li ◽

Xiaoqing Si ◽

...

Keyword(s):

Prussian Blue ◽

Self Assembly ◽

Lithium Metal ◽

Prussian Blue Analogue ◽

Metal Anode ◽

Lithium Metal Anode ◽

Cu Foam

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

Nature Communications ◽

10.1038/s41467-021-23155-3 ◽

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.

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