Commercially Viable Hybrid Li-Ion/Metal Batteries with High Energy Density Realized by Symbiotic Anode and Prelithiated Cathode

作     者：Kui Lin Xiaofu Xu Xianying Qin Ming Liu Liang Zhao Zijin Yang Qi Liu Yonghuang Ye Guohua Chen Feiyu Kang Baohua Li Kui Lin;Xiaofu Xu;Xianying Qin;Ming Liu;Liang Zhao;Zijin Yang;Qi Liu;Yonghuang Ye;Guohua Chen;Feiyu Kang;Baohua Li

作者机构：Shenzhen Key Laboratory on Power Battery Safety Research and Shenzhen Geim Graphene CenterTsinghua Shenzhen International Graduate SchoolShenzhen 518055People’s Republic of China School of Materials Science and EngineeringTsinghua UniversityBeijing 100084People’s Republic of China Contemporary Amperex Technology Co.Ltd.Ningde 352100People’s Republic of China Shenzhen Graphene Innovation Center Co.Ltd.Shenzhen 518055People’s Republic of China College of Materials Science and EngineeringHunan UniversityChangsha 410082People’s Republic of China Department of Mechanical EngineeringThe Hong Kong Polytechnic UniversityHong Kong 999077People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2022年第14卷第9期

页      面：174-186页

核心收录：

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

基　　金：the support by the Key-Area Research and Development Program of Guangdong Province(No.2020B090919003) the National Nature Science Foundation of China(Nos.51872157 and 52072208) the Shenzhen Technical Plan Project(Nos.JCYJ20170817161753629 and JCYJ20170412170911187) the Special Fund Project for Strategic Emerging Industry Development of Shenzhen(No.20170428145209110) the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(No.2017BT01N111) the Support Plan for Shenzhen Manufacturing Innovation Center(No.20200627215553988) the Key projects for core technology research of Dongguan(No.2019622119003) 

主　　题：Hybrid lithium-ion/metal battery Symbiotic anode Porous graphite layer Cathode prelithiation Lithium oxalate 

摘      要：The energy density of commercial lithium(Li)ion batteries with graphite anode is reaching the *** is believed that directly utilizing Li metal as anode without a host could enhance the battery’s energy density to the maximum ***,the poor reversibility and infinite volume change of Li metal hinder the realistic implementation of Li metal in battery ***,a commercially viable hybrid Li-ion/metal battery is realized by a coordinated strategy of symbiotic anode and prelithiated *** be specific,a scalable template-removal method is developed to fabricate the porous graphite layer(PGL),which acts as a symbiotic host for Li ion intercalation and subsequent Li metal deposition due to the enhanced lithiophilicity and sufficient ion-conducting pathways.A continuous dissolution-deintercalation mechanism during delithiation process further ensures the elimination of dead *** a result,when the excess plating Li reaches 30%,the PGL could deliver an ultrahigh average Coulombic efficiency of 99.5% for 180 cycles with a capacity of 2.48 m Ah cm^(-2) in traditional carbonate ***,an air-stable recrystallized lithium oxalate with high specific capacity(514.3 m Ah g^(-1))and moderate operating potential(4.7-5.0 V)is introduced as a sacrificial cathode to compensate the initial loss and provide Li source for subsequent *** on the prelithiated cathode and initial Li-free symbiotic anode,under a practical-level3 m Ah capacity,the assembled hybrid Li-ion/metal full cell with a P/N ratio(capacity ratio of Li Ni_(0.8)Co_(0.1)Mn_(0.1)O_(2) to graphite)of 1.3exhibits significantly improved capacity retention after 300 cycles,indicating its great potential for high-energy-density Li batteries.