Oxygen Vacancies Boost δ-Bi2O3 as a High-Performance Electrode for Rechargeable Aqueous Batteries
Source abstract
Abstract
Metal oxides as electrode materials are of great potential for rechargeable aqueous batteries. However, they suffer from inferior cycle stability and rate capability because of poor electronic and ionic conductivities. Herein, taking vertically orientated Bi2O3 nanoflakes on Ti substrates as examples, we find that the δ-Bi2O3 electrode with plenty of positively charged oxygen defects show remarkably higher specific capacity (264 mA h g–1) and far superior rate capability than that of α-Bi2O3 with less oxygen vacancies. Through pinpointing the existence form and the role of oxygen vacancies within the electrochemical processes, we demonstrate that oxygen vacancies in δ-Bi2O3 can not only promote electrical conductivity but also serve as central entrepots collecting OH– groups via electrostatic force effect, which has boosted the oxidation reaction and enhanced the electrochemical properties. Our work merits an excellent Bi2O3 negative electrode material via giving full play to the role of oxygen vacancies in electrochemical energy storage.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced battery technologies research · Supercapacitor Materials and Fabrication · Electrocatalysts for Energy Conversion
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Automotive Simulation and Control, and School of Materials Science & Engineering, and Electron Microscopy Center, and International Center of Future Science, Jilin University, Changchun 130012, China
Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
CIC Energigune, Albert Einstein 48, Miñano 01510, Spain
IKERBASQUE, Basque Foundation for Science, Bilbao 48013, Spain
Funding
Ministry of Education of the People's Republic of China · Ministry of Science and Technology of the People's Republic of China · People's Government of Jilin Province · Jilin University · National Natural Science Foundation of China · Chinese Academy of Sciences
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