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Tailoring percolative conduction networks and reaction interfaces via infusion of polymeric ionic conductor for high-performance solid-state batteries

Title
Tailoring percolative conduction networks and reaction interfaces via infusion of polymeric ionic conductor for high-performance solid-state batteries
Authors
Shin, Hyun-SeopRyu, Myung-HyunPark, Min-SikKim, HansungJung, Kyu-NamLee, Jong-Won
DGIST Authors
Lee, Jong-Won
Issue Date
2021-03
Citation
Chemical Engineering Journal, 408, 127274
Type
Article
Article Type
Article
Author Keywords
Solid-state batteryIonic conductorComposite electrodeInterfaceBipolar design
Keywords
LITHIUM BATTERIESHYBRID ELECTROLYTESPROGRESSFABRICATIONIMPEDANCESAFETYLAYERS
ISSN
1385-8947
Abstract
Solid-state batteries (SSBs) offer a promising technical solution to meet the key requirements of future energy storage systems, i.e., safety and high energy density. However, the realization of SSBs is hindered by low electrode performance that results from poorly controlled solid-solid contacts. Herein, we propose an effective strategy for tailoring conductive networks and reaction interfaces via the viscosity-controlled infusion of a molten-state polymer electrolyte precursor (polymer ionic conductor, PIC) into a porous composite electrode (CE). A poly(ethylene glycol)-based PIC penetrates a three-dimensional pore network of the CE and transforms to a highly viscous, stable phase under battery operating conditions. The infused PIC enables the formation of percolating Li+ conduction pathways as well as intimate solid-solid reaction interfaces, which leads to the full utilization of the CE at high mass loadings. SSBs assembled with PIC-infused LiFePO4-CEs exhibit superior capacity (154 mAh g−1), rate-capability, and cycling stability than SSBs with unmodified CEs. Moreover, a 10 V-class, bipolar-pouch SSB fabricated using the PIC-infusion technology shows reversible charge–discharge operations without a considerable performance loss. This study demonstrates that the proposed microstructural engineering provides an effective approach to resolving the interfacial solid-solid contact issues of SSBs and can be used to fabricate safe, high-energy, long-cycling SSBs. © 2020 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/12787
DOI
10.1016/j.cej.2020.127274
Publisher
Elsevier BV
Related Researcher
  • Author Lee, Jong-Won Laboratory for Electrochemical Energy Materials and Interfaces
  • Research Interests 이차전지, 연료전지, 재료전기화학, 나노에너지소재
Files:
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Collection:
Department of Energy Science and EngineeringLaboratory for Electrochemical Energy Materials and Interfaces1. Journal Articles


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