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Sun C, Cui X, Xiao F, Cui D, Wang Q, Dang F, Yu H, Lian G. Modulating the d-Band Center of RuO 2 via Ni Incorporation for Efficient and Durable Li-O 2 batteries. Small 2024:e2400010. [PMID: 38470199 DOI: 10.1002/smll.202400010] [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: 02/25/2024] [Indexed: 03/13/2024]
Abstract
Rechargeable Li-O2 batteries (LOBs) are considered as one of the most promising candidates for new-generation energy storage devices. One of major impediments is the poor cycle stability derived from the sluggish reaction kinetics of unreliable cathode catalysts, hindering the commercial application of LOBs. Therefore, the rational design of efficient and durable catalysts is critical for LOBs. Optimizing surface electron structure via the negative shift of the d-band center offers a reasonable descriptor for enhancing the electrocatalytic activity. In this study, the construction of Ni-incorporating RuO2 porous nanospheres is proposed as the cathode catalyst to demonstrate the hypothesis. Density functional theory calculations reveal that the introduction of Ni atoms can effectively modulate the surface electron structure of RuO2 and the adsorption capacities of oxygen-containing intermediates, accelerating charge transfer between them and optimizing the growth pathway of discharge products. Resultantly, the LOBs exhibit a large discharge specific capacity of 19658 mA h g-1 at 200 mA g-1 and extraordinary cycle life of 791 cycles. This study confers the concept of d-band center modulation for efficient and durable cathode catalysts of LOBs.
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Affiliation(s)
- Chaoyang Sun
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Xinhang Cui
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117543, Singapore
| | - Fenglong Xiao
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Deliang Cui
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Qilong Wang
- Key Laboratory for Special Functional Aggregated Materials of Education Ministry, School of Chemistry & Chemical Engineering, Shandong University, Jinan, 250100, P. R. China
| | - Feng Dang
- School of Materials Science & Engineering, Shandong University, Jinan, 250061, P. R. China
| | - Haohai Yu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Gang Lian
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
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