Xin-Yu Zhang , Hai-Yan Hu , Xin-Yu Liu , Jingqiang Wang , Yi-Feng Liu , Yan-Fang Zhu , Ling-Yi Kong , Zhuang-Chun Jian , Shu-Lei Chou , Yao Xiao
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引用次数: 0
Abstract
With the growing demand for energy storage, layered oxide cathodes (NaxTMO2) for sodium-ion batteries (SIBs) have become the spotlight for researchers. However, irreversible multiphase transformation and structural degradation, as well as lattice oxygen loss, hindered their commercialization. Electronic structure modulation based on the orbital hybridization concept is an important way to solve key scientific problems. Herein, due to its unique electronic structure, Sn is chosen as the proof of the conceptual element, and its effect on layered oxide cathode is summarized in three aspects: reversible phase transformation, abnormal structural regulation, and stable anionic redox. Firstly, the large size of Sn4+ suppresses the sliding of the transition metal oxide (TMO2) layer and Na+/vacancy ordering as well as enhances the delocalization of electrons. Secondly, Sn with a similar ionic radius to other TM ions in the structure promotes the stacking of the O3 phase. What’s more, the distinctive electronic structure of Sn4+ will enhance the operating voltage. Thirdly, a strong Sn-O bond stabilizes the lattice oxygen, promotes stable anion redox, and improves the energy density of the battery. Therefore, electronic structure modulation can provide technical direction for the development and industrialization of high-performance SIBs.
期刊介绍:
Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem.
Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.