The influence of different calcination temperatures and times on the chemical performance of LiNi0.5Mn1.5O4 cathode materials

Autor: Fanfei Zeng, Yu Zhang, Zheyu Li, Zhongcai Shao, Shihang Dai
Rok vydání: 2021
Předmět:
Zdroj: Ionics. 27:3739-3748
ISSN: 1862-0760
0947-7047
DOI: 10.1007/s11581-021-04167-x
Popis: Under the premise of the freeze-drying method, the influence of the calcination temperature on the performance of the LiNi0.5Mn1.5O4 cathode material was explored. After determining the calcination temperature, the effect of calcination time on the LiNi0.5Mn1.5O4 cathode material was further studied. XRD, SEM, FT-IR, and a series of electrochemical tests were used to analyze the prepared materials. Through the experiment, the LiNi0.5Mn1.5O4 material prepared at 800 °C has completely crystallized under the same time (12 h), with no impurity peaks, and with uniform particle size; the initial discharge capacity was 107.5 mAh·g−1 at 0.1 C. After the calcination temperature (800 °C) was determined, the material was sintered at 8, 12, 16, and 20 h. The material had sharp diffraction peaks, in complete crystal form, no LixNi1–xO impurity peak, and had good dispersion in the sample. At 5.0 C, the discharge capacity was 56.4 mAh·g−1.
Databáze: OpenAIRE
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