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Deng R, Wang Z, Tan S, Lu G, Huang X, Qu B, Huang G, Xu C, Zhou X, Wang J, Pan F. Organic Molecular Intercalation Enabled Anionic Redox Chemistry with Fast Kinetics for High Performance Magnesium Storage. Small 2024; 20:e2308329. [PMID: 37949813 DOI: 10.1002/smll.202308329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 10/15/2023] [Indexed: 11/12/2023]
Abstract
Rechargeable magnesium-ion batteries possess desirable characteristics in large-scale energy storage applications. However, severe polarization, sluggish kinetics and structural instability caused by high charge density Mg2+ hinder the development of high-performance cathode materials. Herein, the anionic redox chemistry in VS4 is successfully activated by inducing cations reduction and introducing anionic vacancies via polyacrylonitrile (PAN) intercalation. Increased interlayer spacing and structural vacancies can promote the electrolyte ions migration and accelerate the reaction kinetics. Thanks to this "three birds with one stone" strategy, PAN intercalated VS4 exhibits an outstanding electrochemical performance: high discharge specific capacity of 187.2 mAh g-1 at 200 mA g-1 after stabilization and a long lifespan of 5000 cycles at 2 A g-1 are achieved, outperforming other reported VS4-based materials to date for magnesium storage under the APC electrolyte. Theoretical calculations confirm that the intercalated PAN can indeed induce cations reduction and generate anionic vacancies by promoting electron transfer, which can accelerate the electrochemical reaction kinetics and activate the anionic redox chemistry, thus improving the magnesium storage performance. This approach of organic molecular intercalation represents a promising guideline for electrode material design on the development of advanced multivalent-ion batteries.
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Affiliation(s)
- Rongrui Deng
- National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, P. R. China
| | - Zhongting Wang
- National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, P. R. China
| | - Shuangshuang Tan
- National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, P. R. China
| | - Guanjie Lu
- College of Aerospace Engineering, Chongqing University, Chongqing, 400044, P. R. China
| | - Xueting Huang
- National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, P. R. China
| | - Baihua Qu
- National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, P. R. China
- Chongqing Institute of New Energy Storage Materials and Equipment, Chongqing, 400044, P. R. China
| | - Guangsheng Huang
- National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, P. R. China
- Chongqing Institute of New Energy Storage Materials and Equipment, Chongqing, 400044, P. R. China
| | - Chaohe Xu
- National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, P. R. China
- College of Aerospace Engineering, Chongqing University, Chongqing, 400044, P. R. China
- Chongqing Institute of New Energy Storage Materials and Equipment, Chongqing, 400044, P. R. China
| | - Xiaoyuan Zhou
- Chongqing Institute of New Energy Storage Materials and Equipment, Chongqing, 400044, P. R. China
- College of Physics, Chongqing University, Chongqing, 400044, P. R. China
| | - Jingfeng Wang
- National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, P. R. China
- Chongqing Institute of New Energy Storage Materials and Equipment, Chongqing, 400044, P. R. China
| | - Fusheng Pan
- National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, P. R. China
- Chongqing Institute of New Energy Storage Materials and Equipment, Chongqing, 400044, P. R. China
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