Effect of Redox Active Multivalent Metal salts on Micellization of Amphiphilic Block Copolymer for Energy Storage Devices via SANS, DLS and NMR

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.

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

10.26434/chemrxiv.9185948 ◽

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.

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Recent Advances in Transition Metal Dichalcogenide Cathode Materials for Aqueous Rechargeable Multivalent Metal-Ion Batteries

Nanomaterials ◽

10.3390/nano11061517 ◽

2021 ◽

Vol 11 (6) ◽

pp. 1517

Author(s):

Vo Pham Hoang Huy ◽

Yong Nam Ahn ◽

Jaehyun Hur

Keyword(s):

Energy Storage ◽

Transition Metal ◽

Cathode Materials ◽

Metal Ion ◽

Large Scale ◽

Ion Diffusion ◽

Energy Storage Devices ◽

Storage Devices ◽

Recent Advances ◽

Multivalent Metal

The generation of renewable energy is a promising solution to counter the rapid increase in energy consumption. Nevertheless, the availability of renewable resources (e.g., wind, solar, and tidal) is non-continuous and temporary in nature, posing new demands for the production of next-generation large-scale energy storage devices. Because of their low cost, highly abundant raw materials, high safety, and environmental friendliness, aqueous rechargeable multivalent metal-ion batteries (AMMIBs) have recently garnered immense attention. However, several challenges hamper the development of AMMIBs, including their narrow electrochemical stability, poor ion diffusion kinetics, and electrode instability. Transition metal dichalcogenides (TMDs) have been extensively investigated for applications in energy storage devices because of their distinct chemical and physical properties. The wide interlayer distance of layered TMDs is an appealing property for ion diffusion and intercalation. This review focuses on the most recent advances in TMDs as cathode materials for aqueous rechargeable batteries based on multivalent charge carriers (Zn2+, Mg2+, and Al3+). Through this review, the key aspects of TMD materials for high-performance AMMIBs are highlighted. Furthermore, additional suggestions and strategies for the development of improved TMDs are discussed to inspire new research directions.

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Redox-Active Polymers Designed for the Circular Economy of Energy Storage Devices

ACS Energy Letters ◽

10.1021/acsenergylett.1c01625 ◽

2021 ◽

pp. 3450-3457

Author(s):

Siew Ting Melissa Tan ◽

Tyler J. Quill ◽

Maximilian Moser ◽

Garrett LeCroy ◽

Xingxing Chen ◽

...

Keyword(s):

Energy Storage ◽

Circular Economy ◽

Energy Storage Devices ◽

Storage Devices ◽

Redox Active

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An aqueous hybrid electrolyte for low-temperature zinc-based energy storage devices

Energy & Environmental Science ◽

10.1039/d0ee01538e ◽

2020 ◽

Vol 13 (10) ◽

pp. 3527-3535 ◽

Cited By ~ 1

Author(s):

Nana Chang ◽

Tianyu Li ◽

Rui Li ◽

Shengnan Wang ◽

Yanbin Yin ◽

...

Keyword(s):

Energy Storage ◽

Low Temperature ◽

Energy Storage Devices ◽

Storage Devices

A frigostable aqueous hybrid electrolyte enabled by the solvation interaction of Zn2+–EG is proposed for low-temperature zinc-based energy storage devices.

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Ultrathin Carbon Nanosheets for Highly-efficient Capacitive K-ion and Zn-ion Storage

10.26434/chemrxiv.12413411.v2 ◽

2020 ◽

Author(s):

Yamin Zhang ◽

Zhongpu Wang ◽

Deping Li ◽

Qing Sun ◽

Kangrong Lai ◽

...

Keyword(s):

Energy Storage ◽

Porous Carbon ◽

Metal Ion ◽

Rate Capability ◽

Energy Storage Devices ◽

Capacity Retention ◽

Carbon Nanosheets ◽

Storage Devices ◽

High Efficient ◽

Ion Storage

Porous carbon has attracted extensive attentions as the electrode material for various energy storage devices considering its advantages like high theoretical capacitance/capacity, high conductivity, low cost and earth abundant inherence. However, there still exists some disadvantages limiting its further applications, such as the tedious fabrication process, limited metal-ion transport kinetics and undesired structure deformation at harsh electrochemical conditions. Herein, we report a facile strategy, with calcium gluconate firstly reported as the carbon source, to fabricate ultrathin porous carbon nanosheets. <a>The as-prepared Ca-900 electrode delivers excellent K-ion storage performance including high reversible capacity (430.7 mAh g-1), superior rate capability (154.8 mAh g-1 at an ultrahigh current density of 5.0 A g-1) and ultra-stable long-term cycling stability (a high capacity retention ratio of ~81.2% after 4000 cycles at 1.0 A g-1). </a>Similarly, when being applied in Zn-ion capacitors, the Ca-900 electrode also exhibits an ultra-stable cycling performance with ~90.9% capacity retention after 4000 cycles at 1.0 A g-1, illuminating the applicable potentials. Moreover, the origin of the fast and smooth metal-ion storage is also revealed by carefully designed consecutive CV measurements. Overall, considering the facile preparation strategy, unique structure, application flexibility and in-depth mechanism investigations, this work will deepen the fundamental understandings and boost the commercialization of high-efficient energy storage devices like potassium-ion/sodium-ion batteries, zinc-ion batteries/capacitors and aluminum-ion batteries.

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