Regulation of Lithium-Ion Flux by Nanotopology Lithiophilic Boron-Oxygen Dipole in Solid Polymer Electrolytes for Lithium-Metal Batteries

扫码查看

原文链接

NETL
NSTL
万方数据

外文摘要：Inhomogeneous lithium-ion(Li+)deposition is one of the most crucial problems,which severely deteriorates the performance of solid-state lithium metal batteries(LMBs).Herein,we discovered that covalent organic framework(COF-1)with periodically arranged boron-oxygen dipole lithiophilic sites could directionally guide Li+even deposition in asymmetric solid polymer electrolytes.This in situ prepared 3D cross-linked network Poly(ACMO-MBA)hybrid electrolyte simultaneously delivers outstanding ionic conductivity(1.02 X 10-3 S cm-1 at 30 ℃)and excellent mechanical property(3.5 MPa).The defined nanosized channel in COF-1 selectively conducts Li+increasing Li+transference number to 0.67.Besides,The COF-1 layer and Poly(ACMO-MBA)also participate in forming a boron-rich and nitrogen-rich solid electrolyte interface to further improve the interfacial stability.The Li‖Li symmetric cell exhibits remarkable cyclic stability over 1000 h.The Li‖NCM523 full cell also delivers an outstanding lifespan over 400 cycles.Moreover,the Li‖LiFePO4 full cell stably cycles with a capacity retention of 85％after 500 cycles.the Li‖LiFePO4 pouch full exhibits excellent safety performance under pierced and cut conditions.This work thereby further broadens and complements the application of COF materials in polymer electrolyte for dendrite-free and high-energy-density solid-state LMBs.

外文关键词：

covalent organic frameworkion transport regulationlithium metal batterysolid polymer electrolyte

作者：

Manying Cui、Hongyang Zhao、Yanyang Qin、Shishi Zhang、Ruxin Zhao、Miao Zhang、Wei Yu、Guoxin Gao、Xiaofei Hu、Yaqiong Su、Kai Xi、Shujiang Ding

展开 >

作者单位：

School of Chemistry,Engineering Research Center of Energy Storage Materials and Devices,Ministry of Education,State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,China

Department of Materials and Environmental Chemistry,Stockholm University,10691 Stockholm,Sweden

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaYoung Talent Support Plan of Xi'an Jiaotong UniversityNatural Science Basic Research Program of ShaanxiNatural Science Basic Research Program of ShaanxiSwedish Research Council Grantthe"Young Talent Support Plan"of Xi'an Jiaotong University

项目编号：

52273081222783292022TD-272020-JC-092021-05839

出版年：

2024

DOI：

10.1002/eem2.12659

能源与环境材料(英文)

ISSN：

年,卷(期)：2024.7(4)