DataVXAdvanced Energy MaterialsPaper
journal article·2023-07Open access

Earth‐Abundant Na‐Mg‐Fe‐Mn‐O Cathode with Reversible Hybrid Anionic and Cationic Redox

Yaoshen Niu, Zilin Hu, Bo Zhang, Dongdong Xiao, Huican Mao, Lin Zhou, Feixiang Ding, Yuan Liu, Yang Yang, Juping Xu, Wen Yin, Nian Zhang, Zhiwei Li, Xiqian Yu, Hao Hu, Yaxiang Lu, Xiaohui Rong, Ju Li, Yong‐Sheng Hu

Advanced Energy Materials· Volume 13· Issue 27
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Source abstract

Abstract

Abstract Na‐ion batteries (NIBs) are promising for grid‐scale energy storage applications. However, the lack of Co, Ni‐free cathode materials has made them less cost‐effective. In this work, Mg2+ is successfully utilized to activate the oxygen redox reaction in earth‐abundant Fe/Mn‐based layered cathodes to achieve reversible hybrid anionic and cationic redox capacities. A high first charge capacity of ≈210 mAh g−1 with balanced charge–discharge efficiency is achieved without O‐loss, showing a promising energy cost of $2.02 kWh−1. Full cell against hard carbon anode without pre‐sodiation shows energy density exceeding ≈280 Wh kg−1 with a decent capacity retention of 85.6% after 100 cycles. A comprehensive analysis of the charge compensation mechanisms and structural evolution is conducted. Voltage and capacity loss resulting from partially reversible Fe3+ migration to the Na layer is confirmed, shedding light on further improvements for low‐cost NIB cathodes in application scenarios.
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Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Advanced battery technologies research · Supercapacitor Materials and Fabrication

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

Affiliations

Frontier Institute of Science and Technology Xi'an Jiaotong University Xi'an 710049 P. R. China

Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences School of Physical Sciences University of Chinese Academy of Sciences Beijing 100190 P. R. China

Key Lab for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou University Lanzhou 730000 P. R. China

Spallation Neutron Source Science Center Dongguan 523803 P. R. China

State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 P. R. China

Department of Nuclear Science and Engineering and Department of Materials Science and Engineering MIT Cambridge MA 02139 USA

Funding

Youth Innovation Promotion Association of the Chinese Academy of Sciences · Beijing Municipal Natural Science Foundation

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