Ternary Cathode Blend Electrodes for Environmentally Friendly Lithium-Ion Batteries.,ChemSusChem

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Ternary Cathode Blend Electrodes for Environmentally Friendly Lithium-Ion Batteries.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-04-20 , DOI: 10.1002/cssc.202000251
Nicola Michael Jobst _{1,

2} , Alice Hoffmann ₁ , Andreas Klein ₃ , Stefan Zink ₁ , Margret Wohlfahrt-Mehrens ₄

Affiliation

The combination of two active materials into one positive electrode of a lithium‐ion battery is an uncomplicated and cost‐effective way to combine the advantages of different active materials while reducing the disadvantages of each material. In this work, the concept of binary blends is extended to ternary compositions. The combination of three different active materials provides high versatility in designing the properties of an electrode. Therefore, the unique properties of a layered oxide, phospho‐olivine, and spinel type material are mixed to design a high‐energy cathode with improved environmental friendliness. Four different compositions of blend electrodes are investigated, each with individual benefits. Synergistic effects improved the rate capability, power density, thermal and chemical stability simultaneously. The blend electrode consisting of 75 % NMC, 12.5 % LMFP and LMO provides similar energy and power density as a pure NMC electrode while economizing 25 % cobalt and nickel.

中文翻译：

用于环保锂离子电池的三元正极混合电极。

将两种活性材料组合到锂离子电池的一个正极中是一种简单且经济高效的方法，可以结合不同活性材料的优点，同时减少每种材料的缺点。在这项工作中，二元共混物的概念被扩展到三元组合物。三种不同活性材料的组合为电极性能的设计提供了高度的多功能性。因此，将层状氧化物、磷橄榄石和尖晶石型材料的独特性能混合起来，设计出具有改善环境友好性的高能阴极。研究了四种不同成分的混合电极，每种成分都有各自的优点。协同效应同时提高了倍率性能、功率密度、热稳定性和化学稳定性。由 75% NMC、12.5% LMFP 和 LMO 组成的混合电极可提供与纯 NMC 电极相似的能量和功率密度，同时节省 25% 的钴和镍。

更新日期：2020-04-20

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