介孔氮化钒作为反向双离子混合超级电容器的阴离子存储电极。
Mesoporous vanadium nitride as anion storage electrode for reverse dual-ion hybrid supercapacitor.
作者信息
Shi Chenglong, Sun Junlong, Ji Faqi, Chen Wenjun, Pang Youyong, Liu Bo-Tian
机构信息
Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Biological Engineering, Guilin University of Technology, Guilin 541004, China.
Guangdong Institute of Semiconductor Industrial Technology, Guangdong Academy of Science, Guangzhou 510650, China.
出版信息
iScience. 2022 Mar 23;25(4):104141. doi: 10.1016/j.isci.2022.104141. eCollection 2022 Apr 15.
In 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 KMnO nanosheet 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 with desired low-voltage plateau. More importantly, benefiting from unique reverse dual-ion mechanism, the (MPs VN-KMnO NSs/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. It offers new ideas to expand the range of anion-storage materials in dual-ion hybrid supercapacitors.
在传统的双离子体系中，阴极通常用作阴离子存储材料。在此，我们提出了一种具有反向阴离子/阳离子存储机制的新型双离子混合超级电容器，它由作为关键阴离子存储材料的介孔（MPs）VN阳极和生长在碳布上的KMnO纳米片阵列（NSs/CC）作为（钾存储）阴极组成。在充放电过程中，阳极和阴极分别可逆地存储/释放OH离子和K离子。在此，作为阴离子存储电极的MPs VN可在碱性条件下工作，并提供251 mF cm的高电容以及所需的低电压平台。更重要的是，受益于独特的反向双离子机制，（MPs VN-KMnO NSs/CC）混合器件显示出优异的倍率性能和令人满意的面积电容，在100 mV s的扫描速率下经过10000次循环后具有92.2%的良好耐久性。它为扩展双离子混合超级电容器中阴离子存储材料的范围提供了新思路。
Zotero 插件