scholarly journals Agar Acts as Cathode Microskin to Extend the Cycling Life of Zn//α-MnO2 Batteries

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4895
Author(s):  
Linqing Zuo ◽  
Haodong Sun ◽  
Xinhai Yuan ◽  
Juan Wen ◽  
Xi Chen ◽  
...  
Keyword(s):  
Electrode Material ◽  
Coating Layer ◽  
Low Cost ◽  
Storage System ◽  
Specific Capacity ◽  
Energy Storage System ◽  
High Energy ◽  
Cycle Life ◽  
High Energy Density ◽  
Mno2 Electrode

The Zn/MnO2 battery is a promising energy storage system, owing to its high energy density and low cost, but due to the dissolution of the cathode material, its cycle life is limited, which hinders its further development. Therefore, we introduced agar as a microskin for a MnO2 electrode to improve its cycle life and optimize other electrochemical properties. The results showed that the agar-coating layer improved the wettability of the electrode material, thereby promoting the diffusion rate of Zn2+ and reducing the interface impedance of the MnO2 electrode material. Therefore, the Zn/MnO2 battery exhibited outstanding rate performance. In addition, the agar-coating layer promoted the reversibility of the MnO2/Mn2+ reaction and acted as a colloidal physical barrier to prevent the dissolution of Mn2+, so that the Zn/MnO2 battery had a high specific capacity and exhibited excellent cycle stability.

scholarly journals Novel Lithium-Ion Capacitor Based on a NiO-rGO Composite

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3586
Author(s):  
Qi An ◽  
Xingru Zhao ◽  
Shuangfu Suo ◽  
Yuzhu Bai
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Power Density ◽  
High Power ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
Cycle Life ◽  
High Energy Density ◽  
Lithium Ion Capacitor

Lithium-ion capacitors (LICs) have been widely explored for energy storage. Nevertheless, achieving good energy density, satisfactory power density, and stable cycle life is still challenging. For this study, we fabricated a novel LIC with a NiO-rGO composite as a negative material and commercial activated carbon (AC) as a positive material for energy storage. The NiO-rGO//AC system utilizes NiO nanoparticles uniformly distributed in rGO to achieve a high specific capacity (with a current density of 0.5 A g−1 and a charge capacity of 945.8 mA h g−1) and uses AC to provide a large specific surface area and adjustable pore structure, thereby achieving excellent electrochemical performance. In detail, the NiO-rGO//AC system (with a mass ratio of 1:3) can achieve a high energy density (98.15 W h kg−1), a high power density (10.94 kW kg−1), and a long cycle life (with 72.1% capacity retention after 10,000 cycles). This study outlines a new option for the manufacture of LIC devices that feature both high energy and high power densities.

scholarly journals An Experiment-Based Methodology for Evaluating the Impacts of Full Bandwidth Load on the Hybrid Energy Storage System for Electrified Vehicles

Sci ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 3 ◽  
Author(s):  
◽  
◽  
◽  
◽  
◽  
...  
Keyword(s):  
Energy Storage ◽  
Storage System ◽  
Energy Storage System ◽  
High Energy ◽  
High Energy Density ◽  
Frequency Range ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Hybrid Energy Storage System ◽  
Electrified Vehicles

In Electrified Vehicles, the cost, efficiency, and durability of electrified vehicles are dependent on the energy storage system (ESS) components, configuration and its performance. This paper, pursuing a minimal size tactic, describes a methodology for quantitatively and qualitatively investigating the impacts of a full bandwidth load on the ESS in the HEV. However, the methodology can be extended to other electrified vehicles. The full bandwidth load, up to the operating frequency of the electric motor drive (20 kHz), is empirically measured which includes a frequency range beyond the usually covered frequency range by published standard drive cycles (up to 0.5 Hz). The higher frequency band is shown to be more efficiently covered by a Hybrid Energy Storage System (HESS) which in this paper is defined as combination of a high energy density battery, an Ultra-Capacitor (UC), an electrolytic capacitor, and a film capacitor. In this paper, the harmonic and dc currents and voltages are measured through two precision methods and then the results are used to discuss about overall HEV efficiency and durability. More importantly, the impact of the addition of high-band energy storage devices in reduction of power loss during transient events is disclosed through precision measurement based methodology.

scholarly journals An Experiment-Based Methodology for Evaluating the Impacts of Full Bandwidth Load on the Hybrid Energy Storage System for Electrified Vehicles

Sci ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. 26 ◽  
Author(s):  
Masood Shahverdi ◽  
Michael Mazzola ◽  
Matthew Doude ◽  
Quintin Grice ◽  
Jim Gafford ◽  
...  
Keyword(s):  
Energy Storage ◽  
Storage System ◽  
Energy Storage System ◽  
High Energy ◽  
High Energy Density ◽  
Frequency Range ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Hybrid Energy Storage System ◽  
Electrified Vehicles

In Electrified Vehicles, the cost, efficiency, and durability of electrified vehicles are dependent on the energy storage system (ESS) components, configuration and its performance. This paper, pursuing a minimal size tactic, describes a methodology for quantitatively and qualitatively investigating the impacts of a full bandwidth load on the ESS in the HEV. However, the methodology can be extended to other electrified vehicles. The full bandwidth load, up to the operating frequency of the electric motor drive (20 kHz), is empirically measured which includes a frequency range beyond the usually covered frequency range by published standard drive cycles (up to 0.5 Hz). The higher frequency band is shown to be more efficiently covered by a Hybrid Energy Storage System (HESS) which in this paper is defined as combination of a high energy density battery, an Ultra-Capacitor (UC), an electrolytic capacitor, and a film capacitor. In this paper, the harmonic and dc currents and voltages are measured through two precision methods and then the results are used to discuss about overall HEV efficiency and durability. More importantly, the impact of the addition of high-band energy storage devices in reduction of power loss during transient events is disclosed through precision measurement based methodology.

scholarly journals Power Conversion System for Hybrid Battery-Capacitor Storage

Ingeniería ◽  
2020 ◽  
Vol 25 (2) ◽  
pp. 194-211
Author(s):  
Sergio Ignacio Serna-Garcés ◽  
Carlos Andrés Ramos-Paja ◽  
Daniel Gonzalez-Montoya
Keyword(s):  
Sliding Mode ◽  
Storage System ◽  
Energy Storage System ◽  
High Energy ◽  
High Energy Density ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Battery Degradation ◽  
Capacitor Storage ◽  
Power Capability

Context: Thanks to the low emissions of CO2 generated by electric systems, those solutions have anincreased attention from industry and academia. However, the electrical storage systems required in alarge amount of applications must to have both high energy and power densities. Method: To meet those requirements, this paper proposes an active hybrid energy storage system(HESS), which is formed by a battery, i.e. the device with high energy density, and a capacitor, i.e. the device with high power capability. The proposed power system also protects the battery by limiting the current derivative. Results: Two sliding-mode controllers (SMC) are designed to regulate both the battery current and the load voltage. The design process guarantees the global stability and safe battery operation. Conclusions: The controller avoids the battery degradation caused by the high-frequency current components since the capacitor assumes those components demanded by the load profile.

How to efficiently utilize electrode materials in supercapattery?

2019 ◽  
Vol 12 (01) ◽  
pp. 1830005 ◽  
Author(s):  
Kunfeng Chen ◽  
Dongfeng Xue
Keyword(s):  
High Power ◽  
Electrode Material ◽  
Redox Reaction ◽  
Electrode Materials ◽  
High Efficiency ◽  
Storage System ◽  
High Energy ◽  
Structure Design ◽  
High Energy Density ◽  
Charging Time

Theoretical stored capacity of one electrode material is decided by their thermodynamics factors, which can be achieved only when electrode materials fully react at quite long charging time. In order to store large quantities of charges in short charging time, high-efficiency utilization of electrode materials becomes more and more important. Both fast ionic and electronic transports represent the fundamental factor for high-efficiency utilization of electrode materials. Supercapattery, showing both high power density and high energy density, includes supercapattery-type electrode materials, leading to fast redox reaction. This paper focuses on the structure design of supercapattery-type electrode materials and electrode to satisfy dynamic demand for fast redox reaction of one electrode material. The use of redox active cations and the construction of active colloidal supercapatteries are described. This work will give enlightenment to design electrochemical energy storage system for high-power and high energy applications.

scholarly journals Biomass Based Materials in Electrochemical Supercapacitor Applications

2021 ◽  
Author(s):  
Sema Aslan ◽  
Derya Bal Altuntaş
Keyword(s):  
Low Cost ◽  
Storage System ◽  
Energy Storage System ◽  
High Energy ◽  
General Term ◽  
Electrode Structure ◽  
Micro Particles ◽  
Living Organisms ◽  
Short Time ◽  
Supercapacitor Applications

Biomass is the general term for organic substances derived from living organisms (plants and animals). Since, biomass is a renewable, sustainable, innovative, low cost and carbon-neutral energy source, the applications of nano-micro particles produced from biomass in electrochemical applications have emerged. A large number of carbon-based materials, such as featured activated carbon, carbon nanotube, C-dots, biochar, hybrid carbon-metal/metal oxide … etc. can be produced from divergent types of biomass. With the growing energy need in the world, supercapacitors have also developed considerably besides the energy generation and storage methods. The supercapacitor is an energy storage system that can work reversibly to provide high energy in a short time. In these systems, electrode structure and surface properties are crucial for energy capacity enhancement. In this sense, electrode modifications with the above-mentioned biomass-based nano-micro structures are widely used in supercapacitor applications.

A Low Cost, High Energy Density, and Long Cycle Life Potassium-Sulfur Battery for Grid-Scale Energy Storage

2015 ◽  
Vol 27 (39) ◽  
pp. 5915-5922 ◽  
Author(s):  
Xiaochuan Lu ◽  
Mark E. Bowden ◽  
Vincent L. Sprenkle ◽  
Jun Liu
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Low Cost ◽  
High Energy ◽  
Cycle Life ◽  
High Energy Density ◽  
Long Cycle ◽  
Long Cycle Life ◽  
Sulfur Battery
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