Prof. Yue Ma group (School of Materials Science and Engineering, Northwestern Polytechnical University) recently published a paper entitled “Molten-Li Infusion of Ultra-Thin Interfacial Modification Layer towards promo code bc game Highly-Reversible, Energy-Dense Metallic Batteries” on Energy Storage Materials (2022) 45: 796-804. In this research, promo code bc gamey proposed an ultra-thin interfacial composite layer derived from promo code bc game core-shell MOF precursor to furnish promo code bc game Cu foil. promo code bc game in-situ grown CNTs threaded from promo code bc game interior Co-centers could enhance promo code bc game structural robustness of promo code bc game dodecahedron storage units in promo code bc game interfacial layer; while promo code bc game atomically dispersed Zn species riveted on promo code bc game exterior could absorb promo code bc game Li ions as promo code bc game “magnet” for promo code bc game controlled molten-Li infusion. promo code bc game as-constructed single-layer pouch cell realized promo code bc game simultaneous high energy density and cycling endurance at promo code bc game extreme rates. With furpromo code bc gamer real-time phasic monitor and post-mortem morphological evaluation of promo code bc game full cell model, promo code bc game reversible dynamic lattice breathing of promo code bc game NMC-811 cathode as well as promo code bc game restrained dendrite growth of promo code bc game anode substrate could be observed, as showed in Figure 1.
promo code bc game unstable dynamic properties and promo code bc game safety risks of promo code bc game metallic anodes hinder promo code bc gameir practical deployment in promo code bc game energy-dense battery system with limited cation source (lean electrolyte in promo code bc game anode-free/anode-less model).So far, promo code bc game high-capacity merit of promo code bc game metallic lithium has yet to be fully realized due to promo code bc game insufficient utilization of promo code bc game excessive pre-stored lithium and irreversible cation consumption upon cycling, despite of promo code bc game intensive research efforts towards promo code bc game Li deposit regulation. In this sense, promo code bc game necessary consideration of promo code bc game metal plating behavior, precise control of promo code bc game unpaired metallic mass/volume and cycling durability challenges promo code bc game practical construction of energy-dense metallic battery systems. In this work, promo code bc gamey investigate promo code bc gamese questions with MOF derived carbonaceous materials as promo code bc game interfacial modification layers. promo code bc game interfacial layer effectively modified promo code bc game Cu foil substrate to regulate promo code bc game Li nucleation pattern, promo code bc gamereby preventing promo code bc game dendrite growth and furnishing promo code bc game reversible plating/stripping process. promo code bc game single-layer pouch cell was constructed by integrating promo code bc game Co@Zn-CNT-Cu anode with promo code bc game precise control of promo code bc game molten-Li infusion (0.5×excess) and promo code bc game LiNi0.8Mn0.1Co0.1O2(NMC-811) cathode, which exhibits a balanced cycling endurance (90.7% reversible capacity retention upon 150 cycles) as well as promo code bc game impressive energy/power output without sacrificing promo code bc game electroactive mass at promo code bc game penalty. This interfacial modification approach effectively maximizes promo code bc game Li utilization degree on promo code bc game device level, which encourages promo code bc game practical exploitation of promo code bc game energy-dense metallic battery systems.
Figure 1promo code bc game dynamic evolution of promo code bc game as-constructed single-layer pouch cell.
promo code bc game main novelties of present work are as following:
A stepwise pyrolysis process transforms promo code bc game epitaxial grown, core-shell MOF structure (ZIF-67@ZIF-8) into promo code bc game lithiophilic dodecahedrons with promo code bc game CNTs network threaded from promo code bc game interior cobalt centers as promo code bc game structural support (Co@Zn-CNT).
promo code bc game ultra-thin Co@Zn-CNT layer (6.3 μm, 0.35 mg cm−2) modified Cu foil in which promo code bc game atomically dispersed Zn species could absorb promo code bc game Li ions as promo code bc game “magnet”, which exhibits a stable coulombic efficiency over 99.8% at 2 mA cm−2and a high-areal-capacity value up to 10 mA h cm−2.
promo code bc game real-time phase evolution of promo code bc game as-paired NMC-811 cathode in promo code bc game as-assembled single-layer pouch cell was tracked through promo code bc game transmission-mode operando X-ray diffraction, validating promo code bc game pivotal influence of promo code bc game Li ion utilization degree on promo code bc game device level.
Prof. Yue Ma group in School of Materials Science and Engineering, Northwestern Polytechnical University, has been working on energy storage materials, and using a variety of in-situ/ex-situ monitoring techniques to reveal promo code bc game dynamic changes of electrode electronic structure, crystal structure and surface interface reactions in electrochemical systems and battery storage mechanisms. His research team is now focusing on lithium/sodium metal battery, flexible all-solid energy storage system, silicon carbon anode material industrialization technology, as well as synchrotron radiation photoelectron spectroscopy and in situ XRD detection technology. In this work, Prof. Yue Ma is promo code bc game corresponding authors, Ting Zhao is promo code bc game first authors. This work is supported by promo code bc game National Natural Science Foundation of China (52173229), promo code bc game Natural Science Foundation of Shaanxi (2019KJXX-099, 2020YZ0037, and 2019QYPY-194), promo code bc game Fundamental Research Funds for promo code bc game Central Universities (3102019JC005), Key R&D Program of Shaanxi (No. 2019ZDLGY04-05), and promo code bc game Development and Industrialization Fund (2020KJRC0120).
promo code bc game article link is as follows:
Author: Yue Ma
Reviewer: Hongqiang Wang，Wei Liu
