A lean-zinc anode battery based on metal-organic framework-derived carbon

作     者：Chao Li Liheng Liang Xuhui Liu Ning Cao Qingguo Shao Peichao Zou Xiaobei Zang Chao Li;Liheng Liang;Xuhui Liu;Ning Cao;Qingguo Shao;Peichao Zou;Xiaobei Zang

作者机构：State Key Laboratory of Heavy Oil ProcessingSchool of Materials Science and EngineeringChina University of Petroleum(East China)QingdaoChina Department of Physics and AstronomyUniversity of CaliforniaCaliforniaIrvineUSA 

出 版 物：《Carbon Energy》 (碳能源（英文）)

年 卷 期：2023年第5卷第4期

页      面：105-118页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：State Key Laboratory of Heavy Oil Processing,Grant/Award Number:SKLHOP202101006 National Natural Science Foundation of China,Grant/Award Numbers:21905304,52073305 Natural Science Foundation of Shandong Province,Grant/Award Number:ZR2020QE048 

主　　题：Coulombic efficiency hierarchy structure lean-Zn anode MOF-5-derived carbon 

摘      要：Improving zinc metal(Zn^(0))reversibility and minimizing the N/P ratio are critical to boosting the energy density of Zn^(0) ***,in reality,an excess Zn source is usually adopted to offset the irreversible zinc loss and guarantee sufficient zinc cycling,which sacrifices the energy density and leads to poor practicability of Zn^(0) *** address the above conundrum,here,we report a lean-Zn and hierarchical anode based on metal-organic framework(MOF)-derived carbon,where trace Zn^(0) is pre-reserved within the anode structure to make up for any irreversible zinc source *** allows us to construct low N/P ratio Zn^(0) full cells when coupling the lean-Zn anode with Zn-containing ***,high Zn^(0) reversibility(average Coulombic efficiency of 99.4% for 3000 cycles)and long full-cell lifetime(92% capacity retention after 900 cycles)were realized even under the harsh lean-Zn condition(N/P ratio:1.34).The excellent Zn reversibility is attributed to the hierarchy structure that homogenizes zinc ion flux and electric field distribution,as confirmed by theoretical simulations,which therefore stabilizes Zn^(0) *** lean-Zn anode design strategy will provide new insights into construction of high-energy Zn^(0) batteries for practical applications.