scholarly journals Progress and Prospect of Organic Electrocatalysts in Lithium−Sulfur Batteries

2021 ◽  
Vol 9 ◽  
Author(s):  
Yangyang Dong ◽  
Tingting Li ◽  
Dong Cai ◽  
Shuo Yang ◽  
Xuemei Zhou ◽  
...  
Keyword(s):  
Active Sites ◽  
Storage System ◽  
Energy Storage System ◽  
High Energy ◽  
Molecular Structures ◽  
High Energy Density ◽  
Surface Binding ◽  
Metal Metal ◽  
Sulfur Intermediates ◽  
Lithium Sulfur

Lithium−sulfur (Li−S) batteries featured by ultra-high energy density and cost-efficiency are considered the most promising candidate for the next-generation energy storage system. However, their pragmatic applications confront several non-negligible drawbacks that mainly originate from the reaction and transformation of sulfur intermediates. Grasping and catalyzing these sulfur species motivated the research topics in this field. In this regard, carbon dopants with metal/metal-free atoms together with transition–metal complex, as traditional lithium polysulfide (LiPS) propellers, exhibited significant electrochemical performance promotions. Nevertheless, only the surface atoms of these host-accelerators can possibly be used as active sites. In sharp contrast, organic materials with a tunable structure and composition can be dispersed as individual molecules on the surface of substrates that may be more efficient electrocatalysts. The well-defined molecular structures also contribute to elucidate the involved surface-binding mechanisms. Inspired by these perceptions, organic electrocatalysts have achieved a great progress in recent decades. This review focuses on the organic electrocatalysts used in each part of Li−S batteries and discusses the structure–activity relationship between the introduced organic molecules and LiPSs. Ultimately, the future developments and prospects of organic electrocatalysts in Li−S batteries are also discussed.

Dual Electrocatalytic Heterostructures for Efficient Immobilization and Conversion of Polysulfides in Li-S Batteries

2021 ◽  
Author(s):  
Menghua Yang ◽  
Xuewei Wang ◽  
Jinfeng Wu ◽  
Yue Tian ◽  
Xingyu Huang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Storage System ◽  
Energy Storage System ◽  
High Energy ◽  
High Density ◽  
High Energy Density ◽  
Lithium Sulfur ◽  
The Ideal

Lithium sulfur (Li-S) batteries has been investigated as the ideal candidates for future high-density energy storage system with the advantages of abundant reserves, high energy density and competitive cost. The...

Transition Metal Phosphides：New Generation Cathode Host/Separator Modifier for Li-S Batteries

2021 ◽  
Author(s):  
Song Huang ◽  
Huixiang Ang ◽  
Yang Yang ◽  
Minghui Ye ◽  
Yufei Zhang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Transition Metal ◽  
Storage System ◽  
Energy Storage System ◽  
High Energy ◽  
High Energy Density ◽  
Next Generation ◽  
Lithium Sulfur

Owing to promising applications in aircraft, military field and submarine etc., lithium-sulfur (Li-S) batteries with high energy density (2500 Wh·kg-1) are emerging as the next-generation energy storage system at low...

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.

scholarly journals Graphene-Based Nanomaterials as the Cathode for Lithium-Sulfur Batteries

Molecules ◽  
2021 ◽  
Vol 26 (9) ◽  
pp. 2507
Author(s):  
Jingkun Tian ◽  
Fei Xing ◽  
Qiqian Gao
Keyword(s):  
Energy Storage ◽  
Storage System ◽  
Chemical Properties ◽  
Clean Energy ◽  
High Energy ◽  
High Energy Density ◽  
Discharge Process ◽  
Lithium Sulfur Batteries ◽  
Sulfur Cathodes ◽  
Lithium Sulfur

The global energy crisis and environmental problems are becoming increasingly serious. It is now urgent to vigorously develop an efficient energy storage system. Lithium-sulfur batteries (LSBs) are considered to be one of the most promising candidates for next-generation energy storage systems due to their high energy density. Sulfur is abundant on Earth, low-cost, and environmentally friendly, which is consistent with the characteristics of new clean energy. Although LSBs possess numerous advantages, they still suffer from numerous problems such as the dissolution and diffusion of sulfur intermediate products during the discharge process, the expansion of the electrode volume, and so on, which severely limit their further development. Graphene is a two-dimensional crystal material with a single atomic layer thickness and honeycomb bonding structure formed by sp2 hybridization of carbon atoms. Since its discovery in 2004, graphene has attracted worldwide attention due to its excellent physical and chemical properties. Herein, this review summarizes the latest developments in graphene frameworks, heteroatom-modified graphene, and graphene composite frameworks in sulfur cathodes. Moreover, the challenges and future development of graphene-based sulfur cathodes are also discussed.

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