Table of Contents

New breakthrough in NMC811 electrode manufacturing process! Capacity up to 60 mg/cm2.


Enhancing Battery Performance through Ethanol-Induced Phase Inversion Strategy

  • Recently, The team of Prof. Fokko M. Mulder of Delft University of Technology in the Netherlands published A paper entitled "A phase inversion strategy for low-tortuosity and Low-Tortuosity" in Cell Reports Physical Science ultrahigh-mass-loading nickel-rich layered oxide electrodes ". This paper reports a strategy of phase conversion induced by ethanol, which is an effective method for the preparation of high quality supported nickel-rich layered oxide (LiNi0.8Mn0.1Co0.1O2 [NMC811]) electrodes. The ethanol-induced phase change electrode is obviously superior to the conventional NMC cells at 1 C discharge. The non-solvent-induced binder structure improves pore connectivity, reduces the bending coefficient, and rapid solvent removal reduces adhesive migration during drying, enabling ultra-high active mass loads of up to 60 mg/cm2 (12 mAh/cm2). In addition, the high compatibility of this phase conversion process with the roll-to-roll coating devices currently used in industry makes it highly industrial feasible, which has important implications for the development of high energy density batteries.

 EPI Technology: A Game-Changing Strategy for High-Performance Electrodes

  • This work develops a new strategy based on EPI technology for manufacturing high-performance nickel-rich layered oxide electrodes with high-quality loads. Using EPI technology, NMCC811 electrodes with a high active mass load (35 mg/cm2) were designed to perform better than conventional NMC811 electrodes during fast charging, with an improvement of 50% at 0.5C and 120% at 1C. Unlike conventional electrodes, EPI electrodes can be made into ultra-thick electrodes (60 mg/cm2, 12 mAh/cm2) without delamination or cracking problems. The EPI electrode showed a higher weight capacity and a similar capacity retention rate over long cycles than conventional electrodes, indicating that the processing does not affect the positive active material and can significantly improve magnification performance. Most importantly, the introduction of EPI technology only requires the addition of a phase conversion treatment step to the conventional battery manufacturing process, in line with existing industrial production lines, which provides an important technical basis for the preparation of future batteries with high energy and power density.

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