Polyoxometalates and redox-active molecular clusters for supercapacitors

Title

Polyoxometalates and redox-active molecular clusters for supercapacitors

Creator

Thomas S.A.; Baby A.; Balakrishnan S.P.; Rajendran D.N.; Cherusseri J.

Description

Hybrid electric vehicles and portable electronic devices become inevitable part of our daily life and it is necessary to develop efficient energy storage devices to supply them power. Supercapacitors (SCs) are electrochemical energy storage devices with high power densities. The electrochemical performances of a SC depend mainly on the electrode-active material used in it. An efficient electrode-active material should have qualities such as large surface area, porous structure, uniform pore distribution, good chemical and electrochemical stabilities, and good mechanical strength, to name a few. Mesoporous electrode architecture is highly preferred to obtain maximum electrolyte-ion accessibility that can boost the electrochemical performance of the SC electrode. The various electrode-active materials developed to date are transition metal oxides, electronically conducting polymers, carbon nanomaterials, etc. Polyoxometalates (POMs) are comparatively novel electrode candidates that possess excellent structural stability during the reversible redox reactions. A unique characteristic such as higher oxidation state possessed by POMs makes them an ideal platform to accept and release electrons during the electrochemical charge storage. POMs are considered to be a polyatomic anion, which hold early transition metals like Mo, V, W, etc., and are linked to an oxygen atom in a three-dimensional cluster. The cluster formation of POMs enables higher stability and easy to prepare composites with other materials such as carbon nanomaterial, electronically conducting polymers, etc. The preparation of hybrid electrode architectures by anchoring of POMs helps in producing a large number of electroactive sites for the enhanced electrochemical reactions to occur. This chapter explains the salient features and functionalities of POMs and redox-active molecular clusters that affect the SC performance. 2024 Elsevier Inc. All rights reserved.

Source

Supercapacitors: Materials, Design, and Commercialization, pp. 221-243.

Date

2024-01-01

Publisher

Elsevier

Subject

electrochemical energy storage; molecular clusters; Polyoxometalates; rechargeable batteries; supercapacitors

Coverage

Thomas S.A., Department of Physics, Government College for Women (Affiliated to University of Kerala), Kerala, Thiruvananthapuram, India; Baby A., Department of Chemistry, CHRIST (Deemed to be) University, Karnataka, Bengaluru, India; Balakrishnan S.P., Department of Chemistry, CHRIST (Deemed to be) University, Karnataka, Bengaluru, India; Rajendran D.N., Department of Physics, Government College for Women (Affiliated to University of Kerala), Kerala, Thiruvananthapuram, India; Cherusseri J., Research Centre for Nano-Materials and Energy Technology (RCNMET), School of Engineering and Technology, Sunway University, No. 5 Jalan University, Selangor, Bandar Sunway, Subang Jaya, Malaysia

Rights

Restricted Access

Relation

ISBN: 978-044315478-2; 978-044315477-5

Format

Online

Language

English

Type

Book chapter

Identifier

https://doi.org/10.1016/B978-0-443-15478-2.00002-4

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