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- W4249976709 abstract "LiNiO<sub>2</sub> has high energy density but easily reacts with moisture in the atmosphere and deteriorates. We performed qualitative and quantitative evaluations of the degraded phase of LiNiO<sub>2</sub> and the influence of the structural change on the electrochemical properties of the phase. Li<sub>1-x</sub>H<sub>x</sub>NiO<sub>2</sub> phase with cation exchange between Li<sup>+</sup> and H<sup>+</sup> was confirmed by thermogravimetric analysis and Karl Fischer titration measurement. As the H concentration in LiNiO<sub>2</sub> increased, the rate capability deteriorated, especially in the low-temperature range and under low state of charge. Experimental and density functional theory (DFT) calculation results suggested that this outcome was due to increased activation energy of Li<sup>+</sup> diffusion owing to cation exchange. Rietveld analysis of X-ray diffraction and DFT calculation confirmed that the c lattice parameter and Li-O layer reduced because of the Li<sup>+</sup>/H<sup>+</sup> cation exchange. These results indicate that LiNiO<sub>2</sub> modified in the atmosphere has a narrowed Li-O layer, which is the Li diffusion path, and the rate characteristics are degraded." @default.
- W4249976709 created "2022-05-12" @default.
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- W4249976709 date "2020-01-08" @default.
- W4249976709 modified "2023-10-18" @default.
- W4249976709 title "Electrochemical Properties and Crystal Structure of Li+/H+ Cation-Exchanged LiNiO2" @default.
- W4249976709 doi "https://doi.org/10.26434/chemrxiv.11515596.v1" @default.
- W4249976709 hasPublicationYear "2020" @default.
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