scholarly journals Practical Quinone-Based Organic Supercapacitor > 6 V

Yuto Katsuyama ◽  
Takayuki Takehi ◽  
Shu Sokabe ◽  
Mai Tanaka ◽  
Mizuki Ishizawa ◽  

Abstract Inexpensive, high-performing, and environmentally friendly energy storage devices are required for smart grids that efficiently utilize renewable energy. Energy storage devices consisting of organic active materials are promising because organic materials, especially quinones, are ubiquitous and usually do not require harsh conditions for synthesis, releasing less CO2 during mass production. Although fundamental research-scale aqueous quinone-based organic supercapacitors have shown excellent energy storage performance, no practical research has been conducted. We aimed to develop a practical-scale aqueous-quinone-based organic supercapacitor. By connecting 12 cells of size 10 cm × 10 cm × 0.5 cm each in series, we fabricated a high-voltage (> 6 V) aqueous organic supercapacitor that can charge a smartphone at a 1 C rate. This is the first step in commercializing aqueous organic supercapacitors that could solve environmental problems, such as high CO2 emissions, air pollution by toxic metals, and limited electricity generation by renewable resources.

2017 ◽  
Vol 4 (1) ◽  
pp. 1-9
Fábio Ricardo de Oliveira Bento ◽  
Wanderley Cardoso Celeste

In this work, it is presented a methodology for the reconfiguration of smart grids that is applied to a smart grid formed by two microgrids that can be electrically interconnected in contingency situations. Each microgrid is also connected to an Electric Power System (EPS) when operating in the normal state. Moreover, the smart grid includes energy storage devices (batteries) located at strategic points. Serious faults that isolated the microgrids of the EPS and, moreover, considerably reduced the generation capacity of such microgrids are simulated. The proposed methodology is applied to reconfiguration in scenarios involving cooperation between microgrids and/or the use of energy storage devices. Performance indices are also proposed to enable a quantitative analysis for each scenario. It is shown that intelligent cooperation between microgrids and the smart-use storage energy is the best option for reducing the impacts in a contingency scenarios.

Javad Khazaei ◽  
Dinh Hoa Nguyen

One of the major challenges of existing highly distributed smart grid system is the centralized supervisory control and data acquisition (SCADA) system, which suffers from single point of failure. This chapter introduces a novel distributed control algorithm for distributed energy storage devices in smart grids that can communicate with the neighboring storage units and share information in order to achieve a global objective. These global objectives include voltage regulation, frequency restoration, and active/reactive power sharing (demand response). Consensus theory is used to develop controllers for multiple energy storage devices in a cyber-physical environment, where the cyber layer includes the communication system between the storage devices and the physical layer includes the actual control and closed-loop system. Detailed proof of designs is introduced to ensure the stability and convergence of the proposed designs. Finally, the designed algorithms are validated using time-domain simulations in IEEE 14-bus system using MATLAB software.

Yaxiong Zhang ◽  
Xiaosha Cui ◽  
Jiecai Fu ◽  
Yupeng Liu ◽  
Yin Wu ◽  

Transition metal oxides have shown renewed interest as promising electrode materials for high-performance electrochemical energy storage devices. However, its cycle stability deteriorates significantly with the increasing mass loading due to...

2013 ◽  
Vol 4 (2) ◽  
pp. 985-995 ◽  
Guido Carpinelli ◽  
Gianni Celli ◽  
Susanna Mocci ◽  
Fabio Mottola ◽  
Fabrizio Pilo ◽  

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