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Dynamic Ionic Transport Actuated by Nanospinbar-Dispersed Colloidal Electrolytes Toward Dendrite-Free Electrodeposition

Title
Dynamic Ionic Transport Actuated by Nanospinbar-Dispersed Colloidal Electrolytes Toward Dendrite-Free Electrodeposition
Author(s)
Lim, MinhongKim, SuhwanKang, JunsikJin, DaheeAn, HyeonggukLee, HyuntaePark, JoonamLee, MingyuSeo, JiyeonLee, HochunLee, Yong MinLee, Hongkyung
Issued Date
2022-10
Citation
Advanced Functional Materials, v.32, no.40
Type
Article
Author Keywords
colloidal electrolytesionic transportlithium metal batteriesmesoscale turbulencenanospinbars
Keywords
LITHIUM METAL ANODESHIGH-ENERGYGROWTHBATTERIESMECHANISMSCHALLENGESCOMPOSITEMOTIONFLUX
ISSN
1616-301X
Abstract
Inhibiting uneven dendritic Li electroplating is crucial for the safe and stable cycling of Li metal batteries (LMBs). Homogeneous and fast Li+ transport towards the Li surface is required for uniform and dendrite-free deposition. However, the traditional ionic transport of static liquid electrolytes involving electromigration and molecular diffusion can trigger a greater disparity in the Li concentration over the Li surface, leading to irregular dendrite growth. Here, a convective Li+ transfer for suppressing dendrite growth through magnetic nanospinbar (NSB)-dispersed colloidal electrolytes is presented. An ultrahigh-aspect-ratio NSB consisting of a paramagnetic Fe3O4 nanoparticle array and silica outer coating is synthesized. Manipulating the external electromagnetic force can remotely control the rotation of individual NSBs without dispersion failure, thereby generating mesoscale turbulence inside the cells. Regardless of the electrolyte composition, rotating the NSB can reduce the Li+ diffusion layer thickness from the bulk and evenly redistribute the Li+ flux over the Li surface, thereby suppressing Li dendrite growth. The NSB-dispersed electrolyte with advanced salt/solvent compositions demonstrates stable cycling of LMBs over 600 cycles with 70% capacity retention, thereby outperforming the NSB-free cell.
URI
http://hdl.handle.net/20.500.11750/16977
DOI
10.1002/adfm.202204052
Publisher
John Wiley & Sons Ltd.
Related Researcher
  • 이호춘 Lee, Hochun
  • Research Interests Lithium-ion batteries; Novel Materials for rechargeable batteries; Novel energy conversion;storage systems; Electrochemistry; 리튬이차전지; 이차전지용 신규 전극 및 전해액; 신규 에너지변환 및 저장 시스템; 전기화학
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Appears in Collections:
Department of Energy Science and Engineering Electrochemical Materials & Devices Laboratory 1. Journal Articles
Department of Energy Science and Engineering Electrochemistry Laboratory for Sustainable Energy(ELSE) 1. Journal Articles
Department of Energy Science and Engineering Battery Materials & Systems LAB 1. Journal Articles

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