In this work, we introduce trimethylbromosilane (CHSiBr), which can protect lithium metal anodes an formed SEI layer while catalyzing the decomposition of LiO. As a result, lithium-oxygen batteries with CHSiBr offer a long cycle life of 110 cycles with a significantly reduced charging/discharging overpotential.
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http://dx.doi.org/10.1039/d2cc05118d | DOI Listing |
Adv Mater
January 2025
School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, 44919, Republic of Korea.
The utilization of redox mediators (RMs) in lithium-oxygen batteries (LOBs) has underscored their utility in high overpotential during the charging process. Among the currently known RMs, it is exceptionally challenging to identify those with a redox potential capable of attenuating singlet oxygen (O) generation while resisting degradation by reactive oxygen species (ROS), such as O and superoxide (O ). In this context, computational and experimental approaches for rational molecular design have led to the development of 7,7'-bi-7-azabicyclo[2.
View Article and Find Full Text PDFNanomaterials (Basel)
December 2024
The Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China.
Developing highly active and durable non-noble metal catalysts is crucial for energy conversion and storage, especially for proton exchange membrane fuel cells (PEMFCs) and lithium-oxygen (Li-O) batteries. Non-noble metal catalysts are considered the greatest potential candidates to replace noble metal catalysts in PEMFCs and Li-O batteries. Herein, we propose a novel type of non-noble metal catalyst (Fe-Hf/N/C) doped with Hf into a mesoporous carbon material derived from Hf-ZIF-8 and co-doping with Fe and N, which greatly enhanced the activity and durability of the catalyst.
View Article and Find Full Text PDFJ Colloid Interface Sci
December 2024
Key Laboratory of Eco-chemical Engineering, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China. Electronic address:
Despite the ultrahigh theoretical energy density and cost-effectiveness, aprotic lithium-oxygen (Li-O) batteries suffer from slow oxygen redox kinetics at cathodes and large voltage hysteresis. Here, we well-design ultrafine Co nanoparticles supported by N-doped mesoporous hollow carbon nanospindles (Co@HCNs) to serve as efficient electrocatalysts for Li-O battery. Benefiting from strong metal-support interactions, the obtained Co@HCNs manifest high affinity for the LiO intermediate, promoting formation of ultrathin nanosheet-like LiO with low-impedance contact interface on the Co@HCNs cathode surface, which facilitates the reversible decomposition upon charging.
View Article and Find Full Text PDFChem Sci
January 2025
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University Nanjing 211816 China
J Colloid Interface Sci
February 2025
State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials, College of Materials, Xiamen University, Xiamen 361005, China. Electronic address:
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