ORCID Profile
0000-0003-2307-0450
Current Organisation
Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute
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Publisher: Wiley
Date: 22-10-2021
Abstract: Next‐generation batteries based on conversion reactions, including aqueous metal–air batteries, nonaqueous alkali metal‐O 2 and ‐CO 2 batteries, alkali metal‐chalcogen batteries, and alkali metal‐ion batteries have attracted great interest. However, their use is restricted by inefficient reversible conversion of active agents. Developing bifunctional catalysts to accelerate the conversion reaction kinetics in both discharge and charge processes is urgently needed. Graphene‐, or graphene‐like carbon‐supported atomically dispersed metal catalysts (G‐ADMCs) have been demonstrated to show excellent activity in various electrocatalytic reactions, making them promising candidates. Different from G‐ADMCs for catalysis, which only require high activity in one direction, G‐ADMCs for rechargeable batteries should provide high activity in both discharging and charging. This review provides guidance for the design and fabrication of bifunctional G‐ADMCs for next‐generation rechargeable batteries based on conversion reactions. The key challenges that prevent their reversible conversion, the origin of the activity of bifunctional G‐ADMCs, and the current design principles of bifunctional G‐ADMCs for highly reversible conversion, have been analyzed and highlighted for each conversion‐type battery. Finally, a summary and outlook on the development of bifunctional G‐ADMC materials for next‐generation batteries with a high energy density and excellent energy efficiency are given.
Publisher: Wiley
Date: 20-01-2022
Abstract: Magnesium batteries present high volumetric energy density and dendrite‐free deposition of Mg, drawing wide attention in energy‐storage devices. However, their further development remains stagnated due to relevant interfacial issues between the Mg anode and the electrolyte and sluggish solid‐state diffusion kinetics of Mg 2+ ions. Herein, an in situ conversion chemistry to construct a nanostructured Bi anode from bismuth selenide driven by Li + is proposed. Through the combination of operando synchrotron X‐ray diffraction, ex situ synchrotron X‐ray absorption spectroscopy, and comprehensive electrochemical tests, it is demonstrated that the nanosize of the in‐situ‐formed Bi crystals contributes to the fast Mg 2+ diffusion kinetics and highly efficient Mg–Bi alloingy/de‐alloying. The resultant Bi anodes exhibit superior long‐term cycling stability with over 600 cycles under a high current density of 1.0 A g ‐1 . This work provides a new approach to construct alloy anode and paves the way for exploring novel electrode materials for magnesium batteries.
Publisher: Elsevier BV
Date: 05-2022
Publisher: American Chemical Society (ACS)
Date: 30-09-2021
Publisher: American Chemical Society (ACS)
Date: 25-05-2021
Publisher: Wiley
Date: 06-06-2023
Publisher: American Chemical Society (ACS)
Date: 17-12-2022
Abstract: The lack of low-cost catalysts with high activity leads to the unsatisfactory electrochemical performance of Li-CO
Location: China
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