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Yang Z, Liu W, Bai S, Ai P, Wang H, Zheng T, Li Q, Tang S. Anchoring and catalytic insights into bilayer C 4N 3 material for lithium-selenium batteries: a first-principles study. Phys Chem Chem Phys 2024; 26:2291-2303. [PMID: 38165716 DOI: 10.1039/d3cp05075k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
In the present work, a theoretical design for the viability of bilayer C4N3 (bi-C4N3) as a promising host material for Li-Se battery was conducted utilizing first-principles calculations. The AA- and AB-stacking configurations of bilayer C4N3 can effectively inhibit the shuttling of high-order polyselenides through the synergistic effect of physical confinement and strong Li-N bonds. Compared to conventional electrolytes, the AA- and AB-stacking bilayer C4N3 demonstrate enhanced adsorption capabilities for the polyselenides. The anchored structures of Se8 or Li2Sen (n = 1, 2, 4, 6, 8) molecules within the bilayer C4N3 exhibit high electrical conductivities, which are beneficial for enhancing the electrochemical performance. The catalytic effects of AA- and AB-stacking bilayer C4N3 were investigated by the reduction of Se8 and the energy barrier associated with the decomposition of Li2Se. The AA- and AB-stacking bilayer C4N3 can significantly decrease the activation barrier and promote the decomposition of Li2Se. The mean square displacement (MSD) curves reveal the pronounceably sluggish Li-ions diffusions in polyselenides within the AA- and AB-stacking bilayer C4N3, which in turn demonstrates the notable prospects in mitigating the shuttle effect.
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Affiliation(s)
- Zehui Yang
- College of Materials Science and Engineering, Liaoning Technical University, Zhonghua Road. 47, Fuxin, Liaoning 123000, China.
| | - Wentao Liu
- College of Materials Science and Engineering, Liaoning Technical University, Zhonghua Road. 47, Fuxin, Liaoning 123000, China.
| | - Shulin Bai
- College of Materials Science and Engineering, Liaoning Technical University, Zhonghua Road. 47, Fuxin, Liaoning 123000, China.
| | - Peng Ai
- College of Materials Science and Engineering, Liaoning Technical University, Zhonghua Road. 47, Fuxin, Liaoning 123000, China.
| | - Hao Wang
- College of Materials Science and Engineering, Liaoning Technical University, Zhonghua Road. 47, Fuxin, Liaoning 123000, China.
| | - Tuo Zheng
- College of Materials Science and Engineering, Liaoning Technical University, Zhonghua Road. 47, Fuxin, Liaoning 123000, China.
| | - Qingshun Li
- College of Materials Science and Engineering, Liaoning Technical University, Zhonghua Road. 47, Fuxin, Liaoning 123000, China.
| | - Shuwei Tang
- College of Materials Science and Engineering, Liaoning Technical University, Zhonghua Road. 47, Fuxin, Liaoning 123000, China.
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