Open Access
Directing Mg Storage Chemistry in Organic Polymers Towards High Energy Mg Batteries
TLDR
In this paper, the Mg2+-storing organic cathodes were shown to deliver the same energy while using ∼10% of the amount of electrolyte needed for MgCl-based counterparts.Abstract:
Summary Magnesium batteries could offer high energy density and safety due to the non-dendritic Mg metal anode. However, Mg2+ ingress into and diffusion within cathode materials are kinetically sluggish. It is therefore intriguing that recently organic cathodes were shown to deliver high energy and power even at room temperature. Herein we reveal that previous organic cathodes likely all operated on a MgCl-storage chemistry sustained by a large amount of electrolyte that significantly reduces cell energy. We then demonstrate Mg batteries featuring a Mg2+-storage chemistry using quinone polymer cathodes, chloride-free electrolytes, and a Mg metal anode. Under lean electrolyte conditions, the Mg2+-storing organic cathodes deliver the same energy while using ∼10% of the amount of electrolyte needed for the MgCl-based counterparts. The observed specific energy (up to 243 Whr kg−1), power (up to 3.4 kW kg−1), and cycling stability (up to 87% at 2,500 cycles) of Mg-storage cells consolidate organic polymers as promising cathodes for high-energy Mg batteries.read more
Citations
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A Stable Covalent Organic Framework Cathode Enables Ultra-Long Cycle Life for Alkali and Multivalent Metal Rechargeable Batteries
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Electrolyte and Interphase Design for Magnesium Anode: Major Challenges and Perspectives.
Yue Sun,Fei Ai,Yi-Chun Lu +2 more
TL;DR: In this article , a review of rechargeable rechargeable magnesium battery (RMB) is presented, where Mg passivation induced by electrolytes/contaminants, growth patterns of high dimensional Mg0 , and mechanisms of Mg anode degradation are discussed.
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Size‐Controllable Nickel Sulfide Nanoparticles Embedded in Carbon Nanofibers as High‐Rate Conversion Cathodes for Hybrid Mg‐Based Battery
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Reversibility of a High-Voltage, Cl–-Regulated, Aqueous Mg Metal Battery Enabled by a Water-in-Salt Electrolyte
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High Utilization of Composite Magnesium Metal Anodes Enabled by a Magnesiophilic Coating.
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TL;DR: In this paper , a composite Mg metal anodes with high capacity utilization of 75% are achieved by coating magnesiophilic gold nanoparticles on copper foils for the first time.
References
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