20μm Li metal modified with phosphate rich polymer-inorganic interphase applied in commercial carbonate electrolyte  

作　　者：Lin Lin Wei Lu Feipeng Zhao Siru Chen Jia Liu Haiming Xie Yulong Liu 

机构地区：[1]School of Chemistry,Northeast Normal University,Changchun 130024,Jilin,China [2]Key Laboratory of Functional Materials Physics and Chemistry Ministry of Education,Jilin Normal University,Changchun 130103,Jilin,China [3]College of Information Technology,Jilin Normal University,Siping 13600o,Jilin,China [4]Department of Mechanical and Materials Engineering,Western University,London N6A 3K7,Canada

出　　处：《Journal of Energy Chemistry》2023年第1期233-238,I0006,共7页能源化学（英文版）

基　　金：supported by the Jilin Province Science and Technology Department Program(Nos.YDZJ202201ZYTS304);the Science and Technology Project of Jilin Provincial Education Department(JJKH20220428KJ);the R&D Program of Power Batteries with Low Temperature and High Energy,Science and Technology Bureau of Changchun(19SS013);the Key Subject Construction of Physical Chemistry of Northeast Normal University;the Fundamental Research Funds for the Central Universities(2412020FZ007,2412020FZ008);the National Natural Science Foundation of China(22102020)。

摘　　要：Li metal batteries are supposed to reach real application in order to fulfill the high-energy density requirement of energy storage system.Unfortunately,the commonly used carbonate electrolyte react with pristine Li,which result in short lifetime of lithium metal battery.To alleviate the side reactions of Li metal with liquid electrolyte,here we propose a phosphate rich polymer-inorganic layer as an interphase.Due to the inert properties of lithium phosphate derived from LiPO_(2)F_(2)and poly-ether,the side-reaction of carbonate solvent are prevented.As a result,lithium metal anode sustains for 800 cycles in symmetrical cell test under 1 m A cm^(-2).Even under strict condition(20μm Li,capacity ratio N/P=2.3,electrolyte/active material=3μL mg^(-1)),coin cell test still runs stable for 150 cycles with high Coulombic efficiency.Furthermore,both LiFePO_(4)and LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)pouch cell under 5μL m A^(-1)h^(-1)condition also exhibit good stability at 0.5 C and 2 C rate.With this approach,high-energy and high-power Li metal batteries are approaching to real application in the near future.

关 键 词：Lithium metal anode Lithium phosphate Ultra-thin Lithium Solid electrolyte interphase 

分 类 号：TM912[电气工程—电力电子与电力传动]