Citation: Ying LUO, Zhao-Bo DING, Wen LIU, Li-Qin YAN, Fan-Qi MIN, Jing-Ying XIE, Jie LU. Preparation and Properties of Micron Single Crystal High-Voltage LiNi_0.5Mn_1.5O₄ Material[J]. Chinese Journal of Inorganic Chemistry, ;2022, 38(4): 611-619. doi: 10.11862/CJIC.2022.081 shu

Preparation and Properties of Micron Single Crystal High-Voltage LiNi_0.5Mn_1.5O₄ Material

Ying LUO ¹ ,
Zhao-Bo DING ¹ ,
Wen LIU ¹ ,
Li-Qin YAN ¹ ,
Fan-Qi MIN ² ,
Jing-Ying XIE ^1,, ,
Jie LU ³

1.
State Key Laboratory of Space Power-Sources Technology, Shanghai Institute of Space Power-Sources, Shanghai 200245, China
2.
Shanghai Power & Energy Storage Battery System Engineering Technology Co., Ltd., Shanghai 200241, China
3.
Guizhou Best New Energy Materials Co., Ltd., Guizhou 554000, China

Corresponding author: Jing-Ying XIE, jyxie@hit.edu.cn
Received Date: 10 October 2021
Revised Date: 7 March 2022

Figures(8)

High-voltage LiNi_0.5Mn_1.5O₄ materials with controllable morphology were prepared by an improved coprecipitation - high - temperature solid - phase method. A low - temperature and high - pressure reaction environment was designed based on the characteristics that lithium salt - containing crystal water was easy to dehydrate. The prereaction process introduced before high-temperature calcination, can effectively improve the mixing uniformity and reactivity of lithium salt and oxide precursor, inhibiting the formation of impurity phase and reducing the mixing degree of metal ions. By adjusting the pre-reaction temperature, the morphology and particle size of LiNi_0.5Mn_1.5O₄ materials were controllable. The results showed that the samples synthesized by the pre - reaction temperature of 180 ℃ had a regular octahedral single crystal morphology and relatively uniform size distribution, which effectively inhibit the electrode/electrolyte interface reaction so that the synthesized materials showed excellent cycle stability and rate performance. Its capacity retention rate reached 95.3% after 400 cycles at 1C and room temperature, and the specific capacity of 120.9 mAh·g^-1 could still be released at 20C.
- lithium-ion battery,
- high-voltage LiNi_0.5Mn_1.5O₄,
- improved coprecipitation-high-temperature solid-phase method,
- cycling stability
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Preparation and Properties of Micron Single Crystal High-Voltage LiNi0.5Mn1.5O4 Material

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通讯作者: 陈斌, bchen63@163.com

Preparation and Properties of Micron Single Crystal High-Voltage LiNi_0.5Mn_1.5O₄ Material