Readily Usable Bulk Phenoxazine-Based Covalent Organic Framework Cathode Materials with Superior Kinetics and High Redox Potentials

2021 ◽  
Author(s):  
Zhiying Meng ◽  
Ying Zhang ◽  
Mengqing Dong ◽  
Yue Zhang ◽  
Fengmin Cui ◽  
...  
Keyword(s):  
Energy Storage ◽  
Cathode Materials ◽  
High Surface ◽  
Electrical Energy ◽  
Energy Storage Materials ◽  
Redox Potentials ◽  
Electrical Energy Storage ◽  
Surface Areas ◽  
Redox Sites ◽  
Redox Active

Redox-active covalent organic frameworks (COFs) with dense redox sites are promising electrical energy storage materials with robust architectures, high surface areas, insolubility in electrolytes, and open pores for electrolyte transportation,...

scholarly journals Phenazine–Based Covalent Organic Framework Cathode Materials with High Energy and Power Densities

2019 ◽  
Author(s):  
Edon Vitaku ◽  
Cara Gannett ◽  
Keith Carpenter ◽  
Luxi Shen ◽  
Hector Abruna ◽  
...  
Keyword(s):  
Energy Storage ◽  
Conductive Polymer ◽  
Electrical Energy ◽  
High Energy ◽  
Energy Storage Devices ◽  
Electrical Energy Storage ◽  
Storage Devices ◽  
Redox Sites ◽  
Redox Active ◽  
Power Densities

Redox-active covalent organic frameworks (COFs) are promising materials for energy storage devices because of their high density of redox sites, permanent and controlled porosity, high surface areas, and tunable structures. However, the low electrochemical accessibility of their redox-active sites has limited COF-based devices either to thin films (<250 nm) grown on conductive substrates, or to thicker films (1 µm) when a conductive polymer is introduced into the COF pores. Electrical energy storage devices constructed from bulk microcrystalline COF powders, eliminating the need for both thin-film formation and conductive polymer guests, would offer both improved capacity and potentially scalable fabrication processes. Here we report on the synthesis and electrochemical evaluation of a new phenazine-based 2D COF (DAPH-TFP COF), as well as its composite with poly(3,4-ethylenedioxythiophene) (PEDOT). Both the COF and its PEDOT composite were evaluated as powders that were solution-cast onto bulk electrodes serving as current collectors. The unmodified DAPH-TFP COF exhibited excellent electrical access to its redox sites, even without PEDOT functionalization, and outperformed the PEDOT composite of a previously reported anthraquinone-based system. Devices containing DAPH-TFP COF were able to deliver both high energy (250 Wh/kg) and power densities (2950 W/kg), validating the promise of unmodified redox-active COFs that are easily incorporated into electrical energy storage devices.

scholarly journals Phenazine–Based Covalent Organic Framework Cathode Materials with High Energy and Power Densities

2019 ◽  
Author(s):  
Edon Vitaku ◽  
Cara Gannett ◽  
Keith Carpenter ◽  
Luxi Shen ◽  
Hector Abruna ◽  
...  
Keyword(s):  
Energy Storage ◽  
Conductive Polymer ◽  
Electrical Energy ◽  
High Energy ◽  
Energy Storage Devices ◽  
Electrical Energy Storage ◽  
Storage Devices ◽  
Redox Sites ◽  
Redox Active ◽  
Power Densities

Redox-active covalent organic frameworks (COFs) are promising materials for energy storage devices because of their high density of redox sites, permanent and controlled porosity, high surface areas, and tunable structures. However, the low electrochemical accessibility of their redox-active sites has limited COF-based devices either to thin films (<250 nm) grown on conductive substrates, or to thicker films (1 µm) when a conductive polymer is introduced into the COF pores. Electrical energy storage devices constructed from bulk microcrystalline COF powders, eliminating the need for both thin-film formation and conductive polymer guests, would offer both improved capacity and potentially scalable fabrication processes. Here we report on the synthesis and electrochemical evaluation of a new phenazine-based 2D COF (DAPH-TFP COF), as well as its composite with poly(3,4-ethylenedioxythiophene) (PEDOT). Both the COF and its PEDOT composite were evaluated as powders that were solution-cast onto bulk electrodes serving as current collectors. The unmodified DAPH-TFP COF exhibited excellent electrical access to its redox sites, even without PEDOT functionalization, and outperformed the PEDOT composite of a previously reported anthraquinone-based system. Devices containing DAPH-TFP COF were able to deliver both high energy (250 Wh/kg) and power densities (2950 W/kg), validating the promise of unmodified redox-active COFs that are easily incorporated into electrical energy storage devices.

scholarly journals A Ferric-Air Battery base on Solid Oxide Fuel Cell for Electrical Energy Storage

2013 ◽  
Vol 16 (4) ◽  
pp. 257-262 ◽  
Author(s):  
Ting Luo ◽  
Shaorong Wang ◽  
Le Shao ◽  
Jiqing Qian ◽  
Xiaofeng Ye ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electrical Energy ◽  
Solid Oxide ◽  
Active Materials ◽  
Electrical Energy Storage ◽  
Redox Active ◽  
Air Battery ◽  
Solid Oxide Cell ◽  
Excellent Stability

We report a ferric-air, solid oxide battery that consists of a tubular solid oxide cell with Ca(OH)2/CaO dispersed Fe/FeOx powders integrated as the redox-active materials in the fuel chamber. The key feature here is the use of Ca(OH)2 to prevent agglomeration and coarsening of Fe/FeOx powders, and more importantly to enable in situ production of H2/H2O as the electrochemical active redox couple in the fuel electrode. The proof-of-concept solid oxide battery exhibits an energy capacity of 144 Wh kg-1-Fe at a ferric utilization of 18.8% and excellent stability in ten discharge/charge cycles with a voltage efficiency of 83% that have great potential for improvement. These results showed encouraging promise of the ferric-air, solid oxide batteries for electrical energy storage applications.

scholarly journals Redox-Active Zinc Thiolates for Low-Cost Rechargeable Aqueous Zn-ion Batteries

2021 ◽  
Author(s):  
Madison R Tuttle ◽  
Christopher Walter ◽  
Emma Brackman ◽  
Curtis Moore ◽  
Matthew Espe ◽  
...  
Keyword(s):  
Energy Storage ◽  
Large Scale ◽  
Low Cost ◽  
Electrical Energy ◽  
Zinc Ion ◽  
Electrical Energy Storage ◽  
Redox Active ◽  
Further Development

Aqueous zinc-ion batteries (AZIBs) are promising candidates for large-scale electrical energy storage due to the inexpensive, safe, and non-toxic nature of zinc. One key area that requires further development is...

Anion Deficiency Motivated Na2V6O16 Nanobelts for Superior Sustainable Zinc Ion Storage

2021 ◽  
Author(s):  
Xiaojing Liu ◽  
Xinyue Hu ◽  
Shuang Hou ◽  
Wei He ◽  
Zhifu Liang ◽  
...  
Keyword(s):  
Cost Effectiveness ◽  
Energy Storage ◽  
Cathode Materials ◽  
Electrical Energy ◽  
Zinc Ion ◽  
Electrical Energy Storage ◽  
Ion Storage

Owing to the merits of high cost-effectiveness and satisfying eco-efficiency, rechargeable zinc ion batteries (ZIBs) are feasible electrical energy storage for improving grid reliability. However, viable cathode materials usually suffer...

Hierarchical Porous Covalent organic framework/graphene aerogel electrode for High-Performance Supercapacitors

2021 ◽  
Author(s):  
Ning An ◽  
Zhen Guo ◽  
Jiao Xin ◽  
Yuan-Yuan He ◽  
Ke-Feng Xie ◽  
...  
Keyword(s):  
Energy Storage ◽  
Active Sites ◽  
High Performance ◽  
Energy Storage Materials ◽  
Covalent Organic Frameworks ◽  
Graphene Aerogel ◽  
Covalent Organic Framework ◽  
Surface Areas ◽  
Redox Active ◽  
Hierarchical Porous

Redox-active covalent organic frameworks (COFs) are an emerging class of energy storage materials due to their notably abundant active sites, well-defined channels and highly surface areas. However, their poor electrical...

Potassium–sodium niobate based lead-free ceramics: novel electrical energy storage materials

2017 ◽  
Vol 5 (2) ◽  
pp. 554-563 ◽  
Author(s):  
Tengqiang Shao ◽  
Hongliang Du ◽  
Hua Ma ◽  
Shaobo Qu ◽  
Jun Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Design Methodology ◽  
Electrical Energy ◽  
Lead Free ◽  
Energy Storage Materials ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Electrical Energy Storage ◽  
Lead Free Ceramics ◽  
Recoverable Energy

A design methodology for developing lead-free bulk ceramics with large recoverable energy storage density was proposed in this study.

scholarly journals Materials Challenges Facing Electrical Energy Storage

MRS Bulletin ◽  
2008 ◽  
Vol 33 (4) ◽  
pp. 411-419 ◽  
Author(s):  
M. Stanley Whittingham
Keyword(s):  
Energy Storage ◽  
Cathode Materials ◽  
Lower Cost ◽  
Storage Capacity ◽  
Electrical Energy ◽  
New Materials ◽  
Electrical Energy Storage ◽  
Electrochemical Systems ◽  
The Past ◽  
Constituent Elements

AbstractDuring the past two decades, the demand for the storage of electrical energy has mushroomed both for portable applications and for static applications. As storage and power demands have increased predominantly in the form of batteries, the system has evolved. However, the present electrochemical systems are too costly to penetrate major new markets, still higher performance is required, and environmentally acceptable materials are preferred. These limitations can be overcome only by major advances in new materials whose constituent elements must be available in large quantities in nature; nanomaterials appear to have a key role to play. New cathode materials with higher storage capacity are needed, as well as safer and lower cost anodes and stable electrolyte systems. Flywheels and pumped hydropower also have niche roles to play.

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