Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 8, Issue 27, Pages 13572-13584Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta03433a
Keywords
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Funding
- National Natural Science Foundation of China [51871133, 51671115]
- Taishan Scholar Foundation of Shandong Province
- Department of Science and Technology of Shandong Province
- program of Jinan Science and Technology Bureau [2019GXRC001]
- Innovation Projects of Department of Education of Guangdong Province, China [2019KZDXM065]
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Rechargeable magnesium ion batteries (MIBs) have aroused great interests, but their development is restrained by the incompatibility of Mg metal anodes with conventional electrolytes. Replacing Mg metal with alloy anodes is a promising strategy to address this incompatibility issue. Based on phase engineering, we designed and fabricated a biphase Pb0.7Bi0.3/Bi film by a facile magnetron co-sputtering route. Compared with single-phase Pb, Bi and Pb(0.7)Bi(0.3)films, the biphase Pb0.7Bi0.3/Bi electrode delivers significantly enhanced cycling stability and rate performance, which could be attributed to the biphase buffer matrix mitigating large volume variations and favorable phase boundaries accelerating Mg(2+)ion transport. Furthermore, the Mg storage mechanism of Pb(0.7)Bi(0.3)and Pb0.7Bi0.3/Bi films was investigated usingoperandoX-ray diffraction experiments and density functional theory calculations. More importantly, the biphase Pb0.7Bi0.3/Bi electrode exhibits good compatibility with conventional electrolytes like Mg(TFSI)(2).
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