Affiliation:
1. MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry The Key Lab of Low‐carbon Chem & Energy Conservation of Guangdong Province School of Chemistry Sun Yat‐Sen University Guangzhou 510275 P. R. China
2. College of Chemistry and Chemical Engineering Research Center for Ultra Fine Powder Materials Ministry of Education and Jiangxi's Key Laboratory of Green Chemistry Jiangxi Normal University Nanchang 330022 P. R. China
3. Key Laboratory of Advanced Batteries Materials for Electric Vehicles of China Petroleum and Chemical Industry Federation School of Materials Science and Engineering Xi'an University of Technology Xi'an 710048 China
Abstract
AbstractAmmonium ions (NH4+), as non‐metallic charge carriers, are attracting attention in aqueous batteries due to its low molar mass, element sufficiency, and non‐toxicity. However, the host materials for NH4+ storage are still limited. Herein, an oxygen defects‐rich manganese oxide (MnO2–x) for NH4+ storage are reported. The oxygen defects can endow the MnO2–x sample with improved electric conductivity and low interface activation energy. The electrochemical reaction mechanism is also verified by using ex situ X‐ray photoelectron spectroscopy (XPS) and fourier transform infrared spectroscopy (FT‐IR), demonstrating the insertion and extraction of NH4+ in the MnO2–x by formation/breaking of a hydrogen bond. As a result, MnO2–x delivers a high capacity of 109.9 mAh g−1 at the current density of 0.5 A g−1 and retention of 24 mAh g−1 after 1000 cycles at the current density of 4 A g−1, outperforming the pristine MnO2 sample.
Funder
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
24 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献