Introducing NO3- into Carbonate-Based Electrolytes via Covalent Organic Framework to Incubate Stable Interface for Li-Metal Batteries

Introducing NO3- into Carbonate-Based Electrolytes via Covalent Organic Framework to Incubate Stable Interface for Li-Metal Batteries

作者

Wen, YC (Wen, Yucheng) 1

Ding, JY (Ding, Jieying) 1

Yang, Y (Yang, Yan) 1

Lan, XX (Lan, Xuexia) 1

Liu, J (Liu, Jun) 1

Hu, RZ (Hu, Renzong) 1

Zhu, M (Zhu, Min) 1

ADVANCED FUNCTIONAL MATERIALS

文献号2109377

DOI10.1002/adfm.202109377

在线发表DEC 2021

文献类型Article; Early Access

摘要

Lithium nitrate (LiNO3) as an effective additive to construct stable solid electrolyte interface (SEI) is generally applied in ether-based electrolytes, but its poor solubility in carbonate-based electrolytes limits further application for Li metal batteries (LMBs). Therefore, an engineering of introducing NO3- into carbonate-based electrolytes by synthesizing targeted covalent organic framework (EB-COF:NO3) to modify Li anode for incubating a reliable SEI is reported. Its unique structure not only facilitates the desolvation process of lithium ions (Li+) to accelerate the transport of Li+, but also releases NO3- to form beneficial Li3N, LiNxOy species to in situ construct a stable SEI. With the application of EB-COF:NO3, the cycling and rate performance of (50 mu m) Li//LiFePO4 full cell is comprehensively improved under the conditions of poor electrolyte and high loading, significantly increasing capacity retention from 14% to 94% after 200 cycles. And the high voltage Li//LiNi0.5Mn1.5O4 full cell still demonstrates excellent cycling stability with the capacity retention of 92% after 600 cycles. Accordingly, this strategy shares a prospect for the application of covalent organic frameworks (COFs) to build a stable SEI for high-energy-density LMBs, and also broadens the application of LiNO3 in carbonate-based electrolytes.

关键词

作者关键词covalent organic frameworkhigh voltage cathodeLi metal anodelithium nitrate

Keywords PlusLITHIUMANODE

作者信息

通讯作者地址

Hu, Renzong

(通讯作者)

South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China

地址

1 South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China

电子邮件地址msrenzonghu@scut.edu.cn

类别/分类

研究方向ChemistryScience & Technology - Other TopicsMaterials SciencePhysics