In Situ Construction of a LiF-Enriched Interfacial Modification Layer for Stable All-Solid-State Batteries

被引：0

作者：

Jiao, Tianpeng ^{[1
]}

Xia, Meng ^{[1
]}

Chen, Zirong ^{[1
]}

Zou, Yue ^{[1
]}

Liu, Gaopan ^{[1
]}

Fu, Ang ^{[1
]}

Chen, Libao ^{[3
]}

Gong, Zhengliang ^{[4
]}

Yang, Yong ^{[1
,2
]}

Zheng, Jianming ^{[1
]}

机构：

[1] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China

[2] Xiamen Univ, Collaborat Innovat Ctr Chem Energy Mat iChEM, Xiamen 361005, Peoples R China

[3] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[4] Xiamen Univ, Coll Energy, Xiamen 361005, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2022年 / 14卷 / 26期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

all-solid-state batteries; carbon fluoride-silver; LiF nanocrystals; interfacial stability; LiSiPSCl electrolyte; lithium-boron alloy anode; REACTION-MECHANISM; ELECTROLYTE; CONDUCTORS; STABILITY;

D O I：

10.1021/acsami.2c0670029878

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

All-solid-state batteries (ASSBs), particularly based on sulfide solid-state electrolytes (SSEs), are expected to meet the requirements of high-energy-density energy storage. However, the unstable interface between the ceramic pellets and lithium (Li) metal can induce unconstrained Li-dendrite growth with safety concerns. Herein, we design a carbon fluoride-silver (CFx-Ag) composite to modify the SSEs. As lithium fluoride (LiF) nanocrystals can be in situ formed through electrochemical reactions, this LiF-enriched modification layer with high surface energy can more effectively suppress Li dendrite penetration and interfacial reactions between the SSEs and anode. Remarkably, the all-solid-state symmetric cells using a lithium-boron alloy (LiB) anode can stably work to above 2,500 h under 0.5 mA cm(-2) and 2 mAh cm-2 at 60 ? without shorting. A modified LiB|| LiNi0.6Mn0.2Co0.2O2 (NMC622) full cell also demonstrates an improved capacity retention and high Coulombic efficiency (99.9%) over 500 cycles. This work provides an advanced solid-state interface architecture to address Li-dendrite issues of ASSBs.

引用

页码：29878 / 29885

页数：8

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