Self‐Assembled Macrocyclic Copper Complex Enables Homogeneous Catalysis for High‐Loading Lithium–Sulfur Batteries

Author:

Yu Zhihao1,Huang Xiehe1,Zheng Mengting2,Zhang Shan‐Qing2,Yang Ying1,Lu Jun3ORCID

Affiliation:

1. State Key Laboratory of Control and Simulation of Power System and Generation Equipments Tsinghua University Beijing 100084 P. R. China

2. Centre for Clean Environment and Energy School of Environment and Science Griffith University Gold Coast Campus Gold Coast Queensland 4222 Australia

3. College of Chemical and Biological Engineering Zhejiang University Hangzhou 310027 P. R. China

Abstract

AbstractThe practical viability of high‐energy‐density lithium–sulfur (Li–S) batteries stipulates the use of a high‐loading cathode and lean electrolyte. However, under such harsh conditions, the liquid–solid sulfur redox reaction is much retarded due to the poor sulfur and polysulfides utilization, leading to low capacity and fast fading. Herein, a self‐assembled macrocyclic Cu(II) complex (CuL) is designed as an effective catalyst to homogenize and maximize the liquid‐involving reaction. The Cu(II) ion coordinated with four N atoms features a planar hybridization, showing a strong bonding affinity toward lithium polysulfides (LiPSs) along the orbital via steric effects. Such a structure not only lowers the energy barrier of the liquid–solid conversion (Li2S4 to Li2S2) but also guides a 3D deposition of Li2S2/Li2S. As such, with a 1 wt% electrolyte additive of CuL, a high initial capacity of 925 mAh g−1 and areal capacity of 9.62 mAh cm−2 with a low decay of 0.3%/cycle can be achieved under a high sulfur loading of 10.4 mg cm−2 and low electrolyte/sulfur ratio of 6 µL mgs−1. This work is expected to inspire the design of homogenous catalysts and accelerate the uptake of high‐energy‐density Li–S batteries.

Funder

State Grid Corporation of China

Publisher

Wiley

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3