•  
  •  
 
Nano Research

Article Title

Stable wide-temperature and low volume expansion Al batteries: Integrating few-layer graphene with multifunctional cobalt boride nanocluster as positive electrode

Authors

Li-Li Chen, Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, China School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
Na Li, Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, China School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
Huifeng Shi, Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China
Yuefei Zhang, Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China
Wei-Li Song, Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, China
Shuqiang Jiao, Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
Haosen Chen, Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, China
Daining Fang, Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing 100081, China State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, China

Keywords

Al batteries, positive electrode, cobalt boride nanoclusters, ionic liquid, broad temperature

Abstract

To achieve stable positive electrode for promoting the overall electrochemical performance of Al batteries (ABs), here novel cobalt boride (CoB) nanoclusters are synthesized to construct composite electrodes with few-layer graphene (FLG). Due to the presence of amorphous channels in the employed CoB nanoclusters, the ABs with FLG/CoB composite positive electrodes exhibit high rate capability and both mechanical and electrochemical stability in the ABs. With assistance of in situ scanning electron microscopy (SEM), the observation results suggest that the positive electrode of CoB nanoclusters holds almost ignorable volume variation upon electrochemical processes, which substantially alleviates the massive electrode expansion induced by the anion intercalation in the composite positive electrode. Interestingly, the composite positive electrodes provide stable reversible energy storage capability within a broadened temperature range (−30–60 °C), promising a novel strategy to design advanced ABs positive electrodes with enhanced overall energy storage performance.

Graphical Abstract

Publisher

Tsinghua University Press

Share

COinS