Mixed hydroxide precipitate-derived Li(Ni0.333Co0.333Mn0.333)O2 as a cathode material for Li-Ion batteries,International Journal of Energy Research

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Mixed hydroxide precipitate-derived Li(Ni0.333Co0.333Mn0.333)O2 as a cathode material for Li-Ion batteries
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2022-09-12 , DOI: 10.1002/er.8751
Semih Engün _{1,

2} , Kamil Burak Dermenci ₁ , Servet Turan ₁

Affiliation

The mixed hydroxide precipitate (MHP), an intermediate product derived from the laterite ores, is the most abundant Ni source on the earth's crust. Herein, the potential use of MHP without purification for cathode synthesis is explored. The characteristics of NMC111 with 0 to 51% wt. MHP addition are compared in terms of crystal structure, morphology, and electrochemical properties. The typical layered cathode structure is preserved up to the 12.7 wt. % MHP addition. Rietveld refinement results confirm that the lattice parameters and Li-slabs were expanded as the amount of the MHP increased. The electrochemical results show that the first discharge capacity does not decrease until the 5.1 wt. % MHP addition. Furthermore, the long-term stability is improved by increasing MHP addition. While the pristine NMC keeps its 81% of first discharge capacity after 100 cycles, 5.1 wt. % MHP added sample retained 88%. Although the MHP addition tends to lower the rate capability of the cathode, the addition of MHP up to 2.6 wt. % does not compromise fast charge and discharge properties. EIS analyses show that the MHP addition reduces the charge transfer resistance of the cathode, which is a clue to enhanced Li-ion diffusivity.

中文翻译：

混合氢氧化物沉淀衍生的 Li(Ni0.333Co0.333Mn0.333)O2 作为锂离子电池的正极材料

混合氢氧化物沉淀物 (MHP) 是一种源自红土矿石的中间产物，是地壳上最丰富的镍源。在此，探索了未经纯化的 MHP 在阴极合成中的潜在用途。NMC111 的特性为 0 至 51% wt. MHP 添加在晶体结构、形态和电化学性质方面进行了比较。典型的层状正极结构保留到 12.7 wt. % MHP 添加。Rietveld 细化结果证实，晶格参数和 Li-slabs 随着 MHP 量的增加而扩大。电化学结果表明，首次放电容量直到 5.1 wt. % MHP 添加。此外，通过增加 MHP 添加量可以提高长期稳定性。虽然原始 NMC 在 100 次循环后仍保持其 81% 的首次放电容量，但 5.1 wt. % MHP 添加样品保留 88%。尽管 MHP 的添加往往会降低正极的倍率性能，但 MHP 的添加量高达 2.6 wt. % 不损害快速充电和放电性能。EIS 分析表明，MHP 的添加降低了阴极的电荷转移电阻，这是增强锂离子扩散率的线索。

更新日期：2022-09-12

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