journal article·2024-06-14Open access

Mechanically Improving Ion Diffusion in Layered Conducting Polymers for Compact Energy Storage

Kefeng Xiao, Jiaxing Liang, Huabo Liu, Taimin Yang, Junwei Han, Ruopian Fang, Hongyi Xu, Quan-Hong Yang, Da-Wei Wang

ACS Energy Letters· Volume 9· Issue 6

Abstract

Layered conducting polymers have drawn widespread interest in electrochemical energy systems with capacitive ion storage. However, the semi-infinite ion diffusion through the lengthy path within their lamellar structures restricts the power performance, especially in high mass loading electrodes (>10 mg cm –2 ). Herein, we improve the ion diffusion in layered conducting polymers by constructing ion-penetrable defects through mechanical modulation of hydrogen bonding, i.e., ball milling. The ball-milled layered conducting polymers endow the fabrication of high mass loading (up to 30 mg cm –2 ) electrodes for electrochemical capacitors (ECs) with a remarkable areal capacitance of 1.71 F cm –2 and volumetric capacitance of 148.2 F cm –3 at 150 mA cm –2 . Asymmetric ECs are further prototyped, delivering a high areal energy of 0.916 mWh cm –2 and a volumetric energy of 28.68 Wh L –1 at 12.5 mW cm –2 . These findings represent a critical step forward to the practical application of layered conducting polymers for high-power devices with miniaturized configuration.
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Research context

OpenAlex topics: Conducting polymers and applications · Supercapacitor Materials and Fabrication · Dielectric materials and actuators

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia

Shanghai Investigation Design and Research Institute Co., Ltd. (SIDRI), Shanghai 200335, China

Faculty of Materials Science and Energy Engineering, Shenzhen University of Advanced Technology, Shenzhen 518071, China

Institute of Technology for Carbon Neutrality, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518071, China

Guangzhou Great Power Energy & Technology Co., Ltd., Guangzhou 511483, China

Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China

Department of Materials and Environmental Chemistry, Stockholm University, Stockholm 10691, Sweden

Nanoyang Group, State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China

Joint School of National University of Singapore, Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China

Funding

Australian Research Council · University of New South Wales

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