文章基本信息

标题：Mesoporous vanadium nitride as anion storage electrode for reverse dual-ion hybrid supercapacitor
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作者：Chenglong Shi ; Junlong Sun ; Faqi Ji 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2022
卷号：25
期号：4
页码：1-14
DOI：10.1016/j.isci.2022.104141
语种：English
出版社：Elsevier
摘要：SummaryIn traditional dual-ion systems, the cathode usually is employed as anion-storage materials. Herein, we propose a new dual-ion hybrid supercapacitor with reverse anion/cation-storage mechanism, consisting of a mesoporous (MPs) VN anode as a pivotal anion-storage material and K2-xMn8O16nanosheet arrays grown on carbon cloth (NSs/CC) as (K-storage) cathode. During charge/discharge, the anode and cathode reversibly store/release OH−ions and K+ions, respectively. Herein, the MPs VN as anion-storage electrode can operate in an alkaline condition and deliver a high capacitance of 251 mF cm−2with desired low-voltage plateau. More importantly, benefiting from unique reverse dual-ion mechanism, the (MPs VN-K2-xMn8O16NSs/CC) hybrid device displays excellent rate performance and satisfying area capacitance along with good durability of 92.2% after 10,000 cycles at a scan rate of 100 mV s−1. It offers new ideas to expand the range of anion-storage materials in dual-ion hybrid supercapacitors.Graphical abstractDisplay OmittedHighlights•The MPs VN anode as anion storage material was firstly proposed•The dual-ion supercapacitors were firstly constructed by employing the MPs VN anode•The reverse storage mechanism was firstly applied to hybrid supercapacitorsElectrochemistry; Energy application; Energy materials