A Hofmeister effect induced hydrogel electrolyte–electrode interfacial adhesion enhancement strategy for energy-efficient and mechanically robust redoxcapacitors

Du, Yuehui; Mo, Funian; Qin, Chengbing; Ho, Derek; Hu, Haibo

doi:10.1039/d3ta02790b

J. Mater. Chem. A

2023

DOI: 10.1039/d3ta02790b

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A Hofmeister effect induced hydrogel electrolyte–electrode interfacial adhesion enhancement strategy for energy-efficient and mechanically robust redoxcapacitors

Yuehui Du¹,

Funian Mo²,

Chengbing Qin³

et al.

Abstract: How to realize tough interface adhension between hydrogel electrolyte and electrode is one of keys to endow flexible energy storage devices with both high energy efficiency and mechanical durability, but...

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Cited by 5 publications

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Boosting Zn‐Ion Storage Behavior of Pre‐Intercalated MXene with Black Phosphorus toward Self‐Powered Systems

Fang,

Han,

Yang

et al. 2024

Advanced Science

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MXene‐based Zn‐ion capacitors (ZICs) with adsorption‐type and battery‐type electrodes demonstrate high energy storage and anti‐self‐discharge capabilities, potentially being paired with triboelectric nanogenerators (TENGs) to construct self‐powered systems. Nevertheless, inadequate interlayer spacing, deficient active sites, and compact self‐restacking of MXene flakes pose hurdles for MXene‐based ZICs, limiting their applications. Herein, black phosphorus (BP)‐Zn‐MXene hybrid is formulated for MXene‐based ZIC via a two‐step molecular engineering strategy of Zn‐ion pre‐intercalation and BP nanosheet assembly. Zn ions as intercalators induce cross‐linking of MXene flakes with expandable interlayer spacing to serve as scaffolds for BP nanosheets, thereby providing sufficient accessible active sites and efficient migration routes for enhanced Zn‐ion storage. The density functional theory calculations affirm that zinc adsorption and diffusion kinetics are significantly improved in the hybrid. A wearable ZIC with the hybrid delivers a competitive areal energy of 426.3 µWh cm−2 and ultra‐low self‐discharge rate of 7.0 mV h−1, achieving remarkable electrochemical matching with TENGs in terms of low energy loss, matched capacity, and fast Zn‐ion storage. The resultant self‐powered system efficiently collects and stores energy from human motion to power microelectronics. This work advances the Zn‐ion storage of MXene‐based ZICs and their synergy with TENG in self‐powered systems.

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Boosting Zn‐Ion Storage Behavior of Pre‐Intercalated MXene with Black Phosphorus toward Self‐Powered Systems

Fang,

Han,

Yang

et al. 2024

Advanced Science

View full text Add to dashboard Cite

show abstract

Polyzwitterionic hydrogel electrolytes via ultrafast autocatalytic gelation process for flexible Zn-Ion hybrid supercapacitors

Liu,

Wang,

Jiang

et al. 2024

Chemical Engineering Journal

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Mechanically robust and highly conductive bacterial cellulose hydrogels through synergy of directional freeze–thawing and salting-out for wearable sensors

Hu,

Huang,

Liu

et al. 2024

Chemical Engineering Journal

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A Hofmeister effect induced hydrogel electrolyte–electrode interfacial adhesion enhancement strategy for energy-efficient and mechanically robust redoxcapacitors

Abstract: How to realize tough interface adhension between hydrogel electrolyte and electrode is one of keys to endow flexible energy storage devices with both high energy efficiency and mechanical durability, but...

Cited by 5 publications

References 58 publications

Boosting Zn‐Ion Storage Behavior of Pre‐Intercalated MXene with Black Phosphorus toward Self‐Powered Systems

Boosting Zn‐Ion Storage Behavior of Pre‐Intercalated MXene with Black Phosphorus toward Self‐Powered Systems

Polyzwitterionic hydrogel electrolytes via ultrafast autocatalytic gelation process for flexible Zn-Ion hybrid supercapacitors

Mechanically robust and highly conductive bacterial cellulose hydrogels through synergy of directional freeze–thawing and salting-out for wearable sensors

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