Low Temperature Tetragonal Tungsten Bronze Oxides for Li-ion Storage

XU Chengxin ¹ZHANG Wenda ²LOU Chenjie ³LI Chengyu ³XU Ligang ³SHI Yongchao ³LIU Jie ³LUO Huajie ⁴FU Jipeng ⁵KUANG Xiaojun ⁶TANG Mingxue⁷

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作者信息

1. Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials,College of Chemistry and Bioengineering,Guilin University of Technology,Guilin 541006,P.R.China;Center for High Pressure Science and Technology Advanced Research,Beijing 100193,P.R.China
2. Center for High Pressure Science and Technology Advanced Research,Beijing 100193,P.R.China;Guangxi Key Laboratory of Optic and Electronic Materials and Devices,Key Laboratory of New Processing Technology for Nonferrous Metals and Materials,Ministry of Education,College of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,P.R.China
3. Center for High Pressure Science and Technology Advanced Research,Beijing 100193,P.R.China
4. School of Materials Science and Engineering & Key Laboratory of Advanced Materials and Devices for Post-Moore Chips,Ministry of Education,University of Science and Technology Beijing,Beijing 100083,P.R.China
5. Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province,Institute of Optoelectronic Materials and Devices,China Jiliang University,Hangzhou 310018,P.R.China
6. Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials,College of Chemistry and Bioengineering,Guilin University of Technology,Guilin 541006,P.R.China;Guangxi Key Laboratory of Optic and Electronic Materials and Devices,Key Laboratory of New Processing Technology for Nonferrous Metals and Materials,Ministry of Education,College of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,P.R.China
7. Center for High Pressure Science and Technology Advanced Research,Beijing 100193,P.R.China;School of Materials Science and Engineering & Key Laboratory of Advanced Materials and Devices for Post-Moore Chips,Ministry of Education,University of Science and Technology Beijing,Beijing 100083,P.R.China
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Abstract

Nb-based tungsten bronze oxides have emerged as attractive materials in various fields,owing to the structural openings and simple synthesis method.In this work,the tetragonal tungsten bronze(TTB)NaWNbO6 was prepared by solid state reaction at a relatively low temperature of 775 ℃.The local structure was systematically studied by solid state nuclear magnetic resonance(SSNMR)with the aid of transition electronic microscopy(TEM).The analysis indicates that NaWNbO6 has pentagonal,square,and triangular tunnels.Notably,square tunnels were partly occupied(50％)by Na,which creates the ability for the Li-ion storage with a volumetric capacity of 210 A·h·L-1 at 0.2 C.The 2D 23Na-23Na EXSY results further suggest the ability of ions to fast exchange between the tetragonal and pentagonal tunnels,resulting in a high-rate performance 20 C.

Key words

Tetragonal tungsten bronze/Solid-state 23Na NMR/93Nb NMR spectrum/Fast ion exchange

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基金项目

National Natural Science Foundation of China(22090043)

National Natural Science Foundation of China(21622101)

Guangxi Natural Science Foundation,China(2019GXNSFGA245006)

出版年

2024

高等学校化学研究(英文版)

吉林大学

高等学校化学研究(英文版)

CSTPCD

影响因子：0.871

ISSN：1005-9040

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