In Situ Construction a Stable Protective Layer in Polymer Electrolyte for Ultralong Lifespan Solid-State Lithium Metal Batteries

时间:2022-04-13作者:浏览量:77


In Situ Construction a Stable Protective Layer in Polymer Electrolyte for Ultralong Lifespan Solid-State Lithium Metal Batteries

作者:

Zhang, DC (Zhang, Dechao) [1] ; Liu, ZB (Liu, Zhengbo) [1] ; Wu, YW (Wu, Yiwen) [1] ; Ji, SM (Ji, Shaomin) [2] ; Yuan, ZX (Yuan, Zhanxiang) [2] ; Liu, J (Liu, Jun) [1] ; Zhu, M (Zhu, Min) [1]

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文献号2104277

DOI10.1002/advs.202104277

在线发表FEB 2022

已索引2022-03-05

文献类型Article; Early Access

摘要

Solid-state lithium metal batteries (SLMBs) are attracting enormous attention due to their enhanced safety and high theoretical energy density. However, the alkali lithium with high reducibility can react with the solid-state electrolytes resulting in the inferior cycle lifespan. Herein, inspired by the idea of interface design, the 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl) imide as an initiator to generate an artificial protective layer in polymer electrolyte is selected. Time-of-flight secondary ion mass spectrometry and X-ray photoelectron spectroscopy reveal the stable solid electrolyte interface (SEI) is in situ formed between the electrolyte/Li interface. Scanning electron microscopy (SEM) images demonstrate that the constructed SEI can promote homogeneous Li deposition. As a result, the Li/Li symmetrical cells enable stable cycle ultralong-term for over 4500 h. Moreover, the as-prepared LiFePO4/Li SLMBs exhibit an impressive ultra-long cycle lifespan over 1300 cycles at 1 C, as well as 1600 cycles at 0.5 C with a capacity retention ratio over 80%. This work offers an effective strategy for the construction of the stable electrolyte/Li interface, paving the way for the rapid development of long lifespan SLMBs.


关键词

作者关键词dendrite-freeinterface constructionlong lifespansolid electrolyte interfacesolid-state lithium metal batteries

Keywords PlusFAST INTERFACIAL TRANSPORTELECTROCHEMICAL STABILITY

作者信息

通讯作者地址

Liu, Jun

(通讯作者)

South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Peoples R China

地址

1 South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Peoples R China

2 Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Peoples R China

电子邮件地址msjliu@scut.edu.cn

类别/分类

研究方向ChemistryScience & Technology - Other TopicsMaterials Science