Current-Density Regulating Lithium Metal Directional Deposition for Long Cycle-Life Li Metal Batteries

作     者：Mao, Heng Yu, Wei Cai, Zhuanyun Liu, Guixian Liu, Limin Wen, Rui Su, Yaqiong Kou, Huari Xi, Kai Li, Benqiang Zhao, Hongyang Da, Xinyu Wu, Hu Yan, Wei Ding, Shujiang 

作者机构：Xi An Jiao Tong Univ Xian Jiaotong Univ & Shaanxi Quantong Joint Res I Sch Chem Xian Key Lab Sustainable Energy Mat Chem Xian 710049 Peoples R China Xiamen Univ Collaborat Innovat Ctr Chem Energy Mat iChEM State Key Lab Phys Chem Solid Surfaces Xiamen 361005 Peoples R China Xiamen Univ Coll Chem & Chem Engn Dept Chem Xiamen 361005 Peoples R China Chinese Acad Sci Inst Chem CAS Research Educ Ctr Excellence Mol Sci Beijing Natl Lab Mol SciKey Lab Mol Nanostruct & Beijing 100190 Peoples R China Univ Michigan Dept Mech Engn Dearborn MI 48128 USA Xi An Jiao Tong Univ State Key Lab Multiphase Flow Power Engn Dept Environm Sci & Engn Xian 710049 Peoples R China 

出 版 物：《ANGEWANDTE CHEMIE-INTERNATIONAL EDITION》 (应用化学国际版)

年 卷 期：2021年第60卷第35期

页      面：19306-19313页

核心收录：

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：National Natural Science Foundation of China [51773165, 51973171] Natural Science Foundation of Shaanxi Province [2020JC-09] Key Laboratory Construction Program of XiQan Municipal Bureau of Science and Technology [201805056ZD7CG40] China Postdoctoral Science Foundation [2019M663687] Fundamental Research Funds for the Central Universities [xjh012020042] 

主　　题：anode/separator interface depositional interface transfer lithium metal battery long cycles 

摘      要：Uncontrolled dendrite formation in the high energy density of lithium (Li) metal batteries (LMBs) may pose serious safety risks. While numerous studies have attempted to protect separators, these proposed methods fail to effectively inhibit upward dendrite growth that punctures through the separator. Here, we introduce a novel orientated-growth strategy that transfers the main depositional interface to the anode/current collector interface from the anode/separator interface. We placed a layer of cellulose/graphene carbon composite aerogel (CCA) between the current collector and the anode (LCL-bottom). This layer works as a charge organizer that induces a high current density and encourages Li to deposit at the anode/current collector interface. Both in situ and ex situ images of the electrode demonstrate that the anode part of the cell has been flipped;with the newly deposited particles facing the current collector and the smooth surface facing the separator. The electrode in half and full cells showed outstanding cyclic stability and rate capability, with the LCL-bottom/LFP full cell capable of maintaining 94% of its initial capacity after 1000 cycles.