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Citation: LU Yan-Luo, WEI Min, YANG Wen-Sheng, D. G. Evans, DUAN Xue. Influence of Na/Mn Mole Ratio in the Precursor on the Crystal Structure and Chemical Composition of Layered O2 Li_y[Li_1/6Mn_5/6]O₂[J]. Chinese Journal of Applied Chemistry, ;2002, 19(11): 1043-1048. shu

Influence of Na/Mn Mole Ratio in the Precursor on the Crystal Structure and Chemical Composition of Layered O2 Li_y[Li_1/6Mn_5/6]O₂

1.
Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029

Corresponding author: DUAN Xue,
Received Date: 11 April 2002
Available Online: 8 July 2002
Fund Project: 北京市科技新星计划(H013610350112) (H013610350112)北京化工大学青年教师科研基金(QN0136)资助 (QN0136)

The precursors Na_x[Li_1/6Mn_5/6]O₂ having P2 structure were synthesized by solid-state reaction at high temperature followed by calcination. The layered Li_y[Li_1/6Mn_5/6]O₂ was then obtained by refluxing precursor with an excess of LiBr in n-hexanol. Li⁺ was confirmed to be in the host layers by virtue of its slow rate of exchange with molten magnesium nitrate. XRD showed that the Li_y[Li_1/6Mn_5/6]O₂ has a layered O2 structure with hexagonal space group P3ml. Laser particle size analysis of Na_0.06 Li_0.65[Li_0.10Mn_0.88]O₂ gives a uniform particle size distribution with a maximum at 2.88 μm. BET surface area was 4.68 m²/g. The crystals of products possess a defected hexagonal plate-like morphology with stacking faults. XRD and elemental analysis confirmed that the n(Na)/n(Mn) ratio of the reagents shows a direct effect on the crystal structure and chemical composition of both the precusor and final product.
- Li_y[Li_1/6Mn_5/6]O₂,
- layered material,
- crystal structure,
- chemical composition
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Influence of Na/Mn Mole Ratio in the Precursor on the Crystal Structure and Chemical Composition of Layered O2 Liy[Li1/6Mn5/6]O2

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通讯作者: 陈斌, bchen63@163.com

Influence of Na/Mn Mole Ratio in the Precursor on the Crystal Structure and Chemical Composition of Layered O2 Li_y[Li_1/6Mn_5/6]O₂