Tailored Redox Kinetics, Electronic Structures and Electrode/Electrolyte Interfaces for Fast and High Energy-Density Potassium-Organic Battery

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Detail(s)

Original languageEnglish
Article number1907656
Journal / PublicationAdvanced Functional Materials
Publication statusOnline published - 18 Nov 2019

Abstract

Potassium-organic batteries have a great potential for applications in large-scale electricity grids and electric vehicles because of their low cost and sustainability. However, their inferior cycle stability and more importantly low energy density under fast discharge/charge process of organic cathodes limit their applications. This work introduces a simple polymerization processing which enables comprehensive tuning of redox kinetics, electronic structures, and electrode/electrolyte interfaces of the polymer cathodes. With this approach, a potassium-organic battery with an impressive energy density of 113 Wh kg-1 at a high power of 35.2 kW kg-1 is shown which corresponds to a high current density of 147 C and a fully discharge within 10 s. The battery also has impressive cycling stability that a 100% Columbic efficiency is maintained and shows negligible capacity degradation after 1000 cycle at a high current density of 7.35 C. Using the polymer cathode and a dipotassium terephthalate anode, a full battery with superior energy density and cycling stability is demonstrated among all reported all-organic full potassium ion batteries.

Research Area(s)

  • electrode, electrolyte interface, electronic structure, high-performance organic cathodes, potassium-ion batteries, redox kinetics, DIFFUSION-COEFFICIENT, ION BATTERIES, CATHODE, PERFORMANCE, OXIDE, POLYIMIDE

Citation Format(s)

Tailored Redox Kinetics, Electronic Structures and Electrode/Electrolyte Interfaces for Fast and High Energy-Density Potassium-Organic Battery. / Tong, Zhongqiu; Tian, Shuang; Wang, Hui; Shen, Dong; Yang, Rui; Lee, Chun-Sing.

In: Advanced Functional Materials, 18.11.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review