Full-chain enhanced ion transport toward stable lithium metal anodes  

作　　者：Yuliang Gao Fahong Qiao Nan Li Jingyuan You Yong Yang Jun Wang Chao Shen Ting Jin Xi Li Keyu Xie 

机构地区：[1]State Key Laboratory of Solidification Processing,Center for Nano Energy Materials,School of Materials Science and Engineering,Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene(NPU),Xi’an 710072,Shaanxi,China [2]School of Chemistry and Chemical Engineering,Inner Mongolia University,Hohhot 010021,Inner Mongolia,China [3]Department of Applied Physics,The Hong Kong Polytechnic University,Hong Kong 999077,China [4]Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Journal of Energy Chemistry》2023年第4期390-397,共8页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China (51974256 and 52034011);the Outstanding Young Scholars of Shaanxi (2019JC-12);the Natural Science Basic Research Plan in Shaanxi Province (2019JLZ-01 and 2019JLM-29);the Fundamental Research Funds of Universities in Inner Mongolia Autonomous Region (21300-5223735)。

摘　　要：The dendrite growth that results from the slow electrode process kinetics prevents the lithium(Li) metal anode from being used in practical applications. Here, full-chain enhanced ion transport for stabilizing Li metal anodes is proposed. Experimental and theoretical studies confirm that full-chain enhanced ion transport(electrocrystallization, mass transport in the electrolyte and diffusion in solid electrolyte interphase) under magnetoelectrochemistry contributes to a homogeneous, dense, and dendrite-free morphology. Specifically, the enhanced electrocrystallization behavior promotes the Li nucleation;the enhanced mass transport in the electrolyte alleviates the ion concentration gradient at the electrode surface, which helps to inhibit dendrite growth;and the enhanced diffusion in the solid electrolyte interphase further homogenizes the Li deposition behavior, obtaining regular and uniform Li particles.Consequently, the Li metal anode has exceptional cycling stability in both symmetric and full cells,and the pouch cell performs long cycles(170 cycles) in practice evaluation. This work advances fundamental knowledge of the magneto-dendrite effect and offers a new perspective on stabilizing metal anodes.

关 键 词：Lithium metal anodes Ion transport Pouch cell Lithium dendrites Magnetic field 

分 类 号：TM912[电气工程—电力电子与电力传动] TG146.26[一般工业技术—材料科学与工程]