DataVXAdvanced MaterialsPaper
journal article·2021-08

Construction of Supercapacitor‐Based Ionic Diodes with Adjustable Bias Directions by Using Poly(ionic liquid) Electrolytes

Jianze Feng, Yan Wang, Yongtai Xu, Hongyun Ma, Gaowei Wang, Pengjun Ma, Yu Tang, Xingbin Yan

Advanced Materials· Volume 33· Issue 31
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Source abstract

Abstract

Abstract The newly emerging supercapacitor‐diode (CAPode), integrating the characteristics of a diode into an electrical‐double‐layer capacitor, can be employed to extend conventional supercapacitors to new technological applications and may play a crucial role in grid stabilization, signal propagation, and logic operations. However, the reported CAPodes have only been able to realize charge storage in the positive‐bias direction. Here, bias‐direction‐adjustable CAPodes realized by using a polycation‐based ionic liquid (IL) or a polyanion‐based IL as electrolyte in an asymmetric carbon‐based supercapacitor architecture are proposed. The resulting CAPodes exhibit charge‐storage function at only the positive‐ or negative‐bias direction with a high rectification ratio (≈80% for rectification ratio II, RRII) and an outstanding cycling life (4500 cycles), representing a crucial breakthrough for designing high‐performance capacitive ionic diodes.
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Research context

Energy storage

OpenAlex topics: Supercapacitor Materials and Fabrication · Conducting polymers and applications · Advanced Sensor and Energy Harvesting Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratory of Clean Energy Chemistry and Materials State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 P. R. China

State Key Laboratory of Optoelectronic Materials and Technologies School of Materials Science and Engineering Sun Yat‐Sen University Guangzhou 510275 P. R. China

Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 P. R. China

Department of Chemistry Tsinghua University Beijing 100084 P. R. China

State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. China

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