High Energy Li‐Ion Electrodes Prepared via a Solventless Melt Process,Batteries & Supercaps

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High Energy Li‐Ion Electrodes Prepared via a Solventless Melt Process
Batteries & Supercaps ( IF 5.1 ) Pub Date : 2020-01-22 , DOI: 10.1002/batt.201900187
Ksenia Astafyeva ₁ , Capucine Dousset ₁ , Yannick Bureau ₁ , Sara‐Lyne Stalmach ₁ , Bruno Dufour ₁

Affiliation

High areal density and high energy Li‐ion electrodes were prepared using a high throughput green, solventless and inexpensive melt process leading to electrodes of controlled porosity. Melt formulations were developed for NCA cathodes and graphite anodes. The formulations were based on commercially available and inexpensive elastomeric or thermoplastic binders, conventional conducting fillers and >90 wt% electrode active materials. A large range of loadings could be achieved, from 4 to 40 mg cm⁻² single side. Electrochemical performances in half cells (coin cells) are reported. High capacity and cyclability for high loadings of NCA cathodes and graphite anodes were demonstrated. Areal capacities over 5 mAh.cm⁻² in coin cells were obtained at a C/5 rate. Cycling at high rates, up to 5 C was demonstrated.

中文翻译：

通过无溶剂熔融工艺制备的高能锂离子电极

使用高通量绿色，无溶剂和廉价的熔融工艺制备了高面密度和高能量的锂离子电极，从而可控制电极的孔隙率。开发了用于NCA阴极和石墨阳极的熔体配方。该制剂基于可商购的和廉价的弹性体或热塑性粘合剂，常规的导电填料和> 90 wt％的电极活性材料。可以实现大范围的负载，从4到40 mg cm ^-2单面。报道了在半电池（纽扣电池）中的电化学性能。NCA阴极和石墨阳极的高负载量具有高容量和可循环性。超过5 mAh.cm ^-2的地域容量以C / 5的速率获得纽扣电池中的TNF-α。证明了在高达5 C的高速率下循环。

更新日期：2020-01-22

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