首页|Anion storing,oxygen vacancy incorporated perovskite oxide composites for high-performance aqueous dual ion hybrid supercapacitors

Anion storing,oxygen vacancy incorporated perovskite oxide composites for high-performance aqueous dual ion hybrid supercapacitors

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Dual ion storage hybrid supercapacitors(HSCs)are considered as a promising device to overcome the limited energy density of existing supercapacitors while preserving high power and long cyclability.However,the development of high-capacity anion-storing materials,which can be paired with fast charg-ing capacitive electrodes,lags behind cation-storing counterparts.Herein,we demonstrate the surface faradaic OH-storage mechanism of anion storing perovskite oxide composites and their application in high-performance dual ion HSCs.The oxygen vacancy and nanoparticle size of the reduced LaMnO3(r-LaMnO3)were controlled,while r-LaMnO3 was chemically coupled with ozonated carbon nanotubes(oCNTs)for the improved anion storing capacity and cycle performance.As taken by in-situ and ex-situ spectroscopic and computational analyses,OH-ions are inserted into the oxygen vacancies coordi-nating with octahedral Mn with the increase in the oxidation state of Mn during the charging process or vice versa.Configuring OH-storing r-LaMnO3/oCNT composite with Na*storing MXene,the as-fabricated aqueous dual ion HSCs achieved the cycle performance of 73.3％over 10,000 cycles,delivering the max-imum energy and power densities of 47.5 W h kg-1 and 8 kW kg-1,respectively,far exceeding those of previously reported aqueous anion and dual ion storage cells.This research establishes a foundation for the unique anion storage mechanism of the defect engineered perovskite oxides and the advancement of dual ion hybrid energy storage devices with high energy and power densities.

Anion storageDual ion storageDefect engineered perovskitesHybrid supercapacitorsNanocomposites

Taehun Kang、Puritut Nakhanivej、KyungJae Wang、Yu Chen、Yongchul G Chung、Ho Seok Park

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School of Chemical Engineering,Sungkyunkwan University(SKKU),2066,Seobu-ro,Jangan-gu,Suwon,Gyeonggi-do 16419,Republic of Korea

Warwick Manufacturing Group(WMG),University of Warwick,Coventry CV4 7AL,United Kingdom

School of Chemical Engineering,Pusan National University,Geumjeong-gu,Busan,Gyeongsangnam-do 46241,Republic of Korea

SKKU Institute of Energy Science and Technology(SIEST),Sungkyunkwan University,2066,Seoburo,Jangan-gu,Suwon 440-746,Republic of Korea

SKKU Advanced Institute of Nano Technology(SAINT),Sungkyunkwan University,2066,Seoburo,Jangan-gu,Suwon 440-746,Republic of Korea

Department of Health Sciences and Technology,Samsung Advanced Institute for Health Sciences and Technology(SAIHST),Sungkyu

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National Research Foundation of Korea grant funded by the Korea government(MSIT)KISTI

NRF-2020R1A3B2079803KSC-2023-CRE-0166

2024

10.1016/j.jechem.2024.02.032

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.94(7)