Affiliation:
1. Hebei Key Laboratory of Optic‐Electronic Information and Materials National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices College of Physics Science and Technology Hebei University Baoding 071002 China
2. Pillar of Engineering Product Development Singapore University of Technology and Design 8 Somapah Road Singapore 487372 Singapore
Abstract
AbstractAluminum batteries (ABs) are identified as one of the most promising candidates for the next generation of large‐scale energy storage elements because of their efficient three‐electron reaction. Compared to ionic electrolytes, aqueous aluminum‐ion batteries (AAIBs) are considered safer, less costly, and more environmentally friendly. However, considerable cycling performance is a key issue limiting the development of AAIBs. Stable, efficient, and electrolyte‐friendly cathodes are most desirable for AAIBs. Herein, a rod‐shaped defect‐rich α‐MnO2 is designed as a cathode, which is capable to deliver high performance with stable cycling for 180 cycles at 500 mA g−1 and maintains a discharge specific capacity of ≈100 mAh g−1. In addition, the infiltrability simulation is effectively utilized to corroborate the rapid electrochemical reaction brought about by the defective mechanism. With the formation of oxygen vacancies, the dual embedding of protons and metal ions is activated. This work provides a brand‐new design for the development and characterization of cathodes for AAIBs.
Funder
National Natural Science Foundation of China