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Anion‐Rectifying Polymeric Single Lithium‐Ion Conductors

Polymeric single lithium (Li)‐ion conductors (SICs), along with inorganic conducting materials such as sulfides and oxides, have received significant attention as promising solid‐state electrolytes. Yet their practical applications have been plagued predominantly by sluggish ion transport. Here, a n...

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Published in:Advanced functional materials 2022-02, Vol.32 (6), p.n/a
Main Authors: Cho, Seok‐Kyu, Oh, Kyeong‐Seok, Shin, Jong Chan, Lee, Ji Eun, Lee, Kyung Min, Cho, Junbeom, Lee, Won Bo, Kwak, Sang Kyu, Lee, Minjae, Lee, Sang‐Young
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cited_by cdi_FETCH-LOGICAL-c3173-f04df303ad4e960ad6c3f4994a6309711d374e28ddf8ea260ad71bf510b4ea563
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creator Cho, Seok‐Kyu
Oh, Kyeong‐Seok
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Lee, Sang‐Young
description Polymeric single lithium (Li)‐ion conductors (SICs), along with inorganic conducting materials such as sulfides and oxides, have received significant attention as promising solid‐state electrolytes. Yet their practical applications have been plagued predominantly by sluggish ion transport. Here, a new class of quasi‐solid‐state SICs based on anion‐rectifying semi‐interpenetrating polymer networks (semi‐IPNs) with reticulated ion nanochannels are demonstrated. This semi‐IPN SIC (denoted as sSIC) features a bicontinuous and nanophase‐separated linear cationic polyurethane (cPU), which supports single‐ion conducting nanochannels, and ultraviolet‐crosslinked triacrylate polymer, which serves as a mechanical framework. The cPU phase is preferentially swollen with a liquid electrolyte and subsequently allows anion‐rectifying capability and nanofluidic transport via surface charge, which enable fast Li+ migration through ion nanochannels. Such facile Li+ conduction is further enhanced by tuning ion‐pair (i.e., freely movable anions and cations tethered to the cPU chains) interaction. Notably, the resulting sSIC provides high Li+ conductivity that exceeds those of commercial carbonate liquid electrolytes. This unusual single‐ion conduction behavior of the sSIC suppresses anion‐triggered interfacial side reactions with Li‐metal anodes and facilitates electrochemical reaction kinetics at electrodes, eventually improving rate performance and cycling retention of Li‐metal cells (comprising LiNi0.8Co0.1Mn0.1O2 cathodes and Li‐metal anodes) compared to those based on carbonate liquid electrolytes. A new class of quasi‐solid‐state single‐ion conductor (SIC) based on an anion‐rectifying semi‐interpenetrating polymer network (semi‐IPN) with reticulated ion nanochannels is presented. The semi‐IPN SIC consists of bicontinuous nanophase‐separated linear cationic polyurethane and ultraviolet‐crosslinked ethoxylated trimethylolpropane triacrylate polymers. The semi‐IPN SIC, driven by its accelerated Li+ transport that outperforms those of commercial carbonate liquid electrolytes, improves electrochemical performance of Li‐metal cells.
doi_str_mv 10.1002/adfm.202107753
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Yet their practical applications have been plagued predominantly by sluggish ion transport. Here, a new class of quasi‐solid‐state SICs based on anion‐rectifying semi‐interpenetrating polymer networks (semi‐IPNs) with reticulated ion nanochannels are demonstrated. This semi‐IPN SIC (denoted as sSIC) features a bicontinuous and nanophase‐separated linear cationic polyurethane (cPU), which supports single‐ion conducting nanochannels, and ultraviolet‐crosslinked triacrylate polymer, which serves as a mechanical framework. The cPU phase is preferentially swollen with a liquid electrolyte and subsequently allows anion‐rectifying capability and nanofluidic transport via surface charge, which enable fast Li+ migration through ion nanochannels. Such facile Li+ conduction is further enhanced by tuning ion‐pair (i.e., freely movable anions and cations tethered to the cPU chains) interaction. Notably, the resulting sSIC provides high Li+ conductivity that exceeds those of commercial carbonate liquid electrolytes. This unusual single‐ion conduction behavior of the sSIC suppresses anion‐triggered interfacial side reactions with Li‐metal anodes and facilitates electrochemical reaction kinetics at electrodes, eventually improving rate performance and cycling retention of Li‐metal cells (comprising LiNi0.8Co0.1Mn0.1O2 cathodes and Li‐metal anodes) compared to those based on carbonate liquid electrolytes. A new class of quasi‐solid‐state single‐ion conductor (SIC) based on an anion‐rectifying semi‐interpenetrating polymer network (semi‐IPN) with reticulated ion nanochannels is presented. The semi‐IPN SIC consists of bicontinuous nanophase‐separated linear cationic polyurethane and ultraviolet‐crosslinked ethoxylated trimethylolpropane triacrylate polymers. 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subjects accelerated li‐ion transport
Anions
anion‐rectifying capability
Anodes
Cations
Chemical reactions
Conductors
Electrolytes
Electrolytic cells
Fluidics
Interpenetrating networks
Ion transport
Lithium
Materials science
Molten salt electrolytes
Nanochannels
Nanofluids
polymeric single‐ion conductors
Polymers
Polyurethane resins
Reaction kinetics
reticulated ion nanochannels
semi‐interpenetrating polymer network
Solid electrolytes
Surface charge
title Anion‐Rectifying Polymeric Single Lithium‐Ion Conductors
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