首页|Thick Electrodes of a Self-Assembled MXene Hydrogel Composite for High-Rate Energy Storage

Thick Electrodes of a Self-Assembled MXene Hydrogel Composite for High-Rate Energy Storage

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Supercapacitors based on two-dimensional MXene(Ti3C2Tz)have shown extraordinary performance in ultrathin electrodes with low mass loading,but usually there is a significant reduction in high-rate performance as the thickness increases,caused by increasing ion diffusion limitation.Further limitations include restacking of the nanosheets,which makes it challenging to realize the full potential of these electrode materials.Herein,we demonstrate the design of a vertically aligned MXene hydrogel composite,achieved by thermal-assisted self-assembled gelation,for high-rate energy storage.The highly interconnected MXene network in the hydrogel architecture provides very good electron transport properties,and its vertical ion channel structure facilitates rapid ion transport.The resulting hydrogel electrode show excellent performance in both aqueous and organic electrolytes with respect to high capacitance,stability,and high-rate capability for up to 300 pm thick electrodes,which represents a significant step toward practical applications.

energy storagehigh-ratehydrogelMXeneself-assemble

Leiqiang Qin、Jianxia Jiang、Lintao Hou、Fengling Zhang、Johanna Rosen

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Department of Physics,Chemistry and Biology(IFM),Linköping University,Linköping SE-58183,Sweden

Flexible Electronics Innovation Institute(FEII),Jiangxi Key Laboratory of Flexible Electronics,Jiangxi Science and Technology Normal University,Nanchang 330013,China

Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials,Physics Department,Jinan University,Guangzhou 510632,China

National Natural Science Foundation of ChinaJiangxi Provincial Natural Science FoundationSSF Synergy ProgramSwedish Energy AgencyKnut and Alice Wallenberg(KAW)Foundation through a Fellowship Grant and a Project GrantNational Natural Science Foundation of ChinaYouth Projects of Joint Fund of Basic and Applied Basic Research Fund of Guangdong ProvinceKey Projects of Joint Fund of Basic and Applied Basic Research Fund of Guangdong ProvinceHigh-End Foreign Experts ProjectGuangzhou Key laboratory of Vacuum Coating Technologies and New Energy Materials Open Projects Fund

5210321220224BAB214022EM16-0004EM 42033-1KAW2020.0033617740772020A15151107382019B1515120073G20200019046KFVE20200006

2024

10.1002/eem2.12653

能源与环境材料(英文)

能源与环境材料(英文)

ISSN：
年,卷(期)：2024.7(4)