Citation: Junhao Dai, Zhu He, Xinhai Li, Guochun Yan, Hui Duan, Guangchao Li, Zhixing Wang, Huajun Guo, Wenjie Peng, Jiexi Wang. Ultrafast spray pyrolysis for synthesizing uniform Mg-doped LiNi_0.9Co_0.05Mn_0.05O₂[J]. Chinese Chemical Letters, ;2025, 36(6): 110063. doi: 10.1016/j.cclet.2024.110063 shu

Ultrafast spray pyrolysis for synthesizing uniform Mg-doped LiNi_0.9Co_0.05Mn_0.05O₂

Junhao Dai ^{a, b} ,
Zhu He ^a ,
Xinhai Li ^{a, c} ,
Guochun Yan ^{a, c} ,
Hui Duan ^{a, c} ,
Guangchao Li ^{a, c} ,
Zhixing Wang ^{a, c} ,
Huajun Guo ^{a, c} ,
Wenjie Peng ^{a, c} ,
Jiexi Wang ^{a, c, *,}

a.
National Energy Metal Resources and New Materials Key Laboratory, Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Hunan Provincial Key Laboratory of Nonferrous Value-Added Metallurgy, School of Metallurgy and Environment, Central South University, Changsha 410083, China
b.
School of Materials Science and Engineering, Central South University, Changsha 410083, China
c.
National Engineering Research Centre of Advanced Energy Storage Materials, Changsha 410205, China

wangjiexikeen@csu.edu.cn

Received Date: 15 April 2024
Revised Date: 13 May 2024
Accepted Date: 27 May 2024
Available Online: 28 May 2024

Figures(4)

Nickel-rich cathode materials have received widespread attention due to their high energy density. However, the poor rate capability and inferior cycle stability seriously hinder their large-scale application. The traditional co-precipitation method for preparing them has a long process and easily arises agglomeration leading to inhomogeneous element distribution. Here, a novel precursor containing Li element was prepared by ultrafast spray pyrolysis (SP) in 3–5 s. Then the precursor was used to synthesize pristine LiNi_0.9Co_0.05Mn_0.05O₂ (NCM90) and 1% Mg modified LiNi_0.9Co_0.05Mn_0.05O₂ (NCM90-Mg1). This method gets rid of mixing Li/Mg source and the precursor prepared by common co-precipitation, thus could achieve homogeneous lithiation and Mg²⁺ doping. The cell parameter c is expanded, and the cation disorder is reduced after Mg²⁺ doping. Furthermore, the harmful H2-H3 phase transition in NCM90-Mg1 is also well suppressed. As a result, the obtained NCM90-Mg1 shows better electrochemical performance than NCM90. Within 2.8–4.3 V (25 ℃), the specific discharge capacity of NCM90-Mg1 at 5 C is as high as 169.1 mAh/g, and an outstanding capacity retention of 70.0% (10.0% higher than NCM90) can be obtained after 400 cycles at 0.5 C. At 45 ℃, a capacity retention of 81.9% after 100 cycles at 1 C is recorded for NCM90-Mg1. Moreover, the NCM90-Mg1 also exhibits superior cycle stability when cycled at high cut-off voltage (4.5 V, 25 ℃), possessing the capacity retention of 79.2% after 200 cycles at 1 C. Therefore, SP can be proposed as a powerful method for the preparation of multi-element materials for next-generation high energy density LIBs.
- Ultrafast synthesis,
- Lithium ion battery,
- Spray pyrolysis,
- LiNi_0.9Co_0.05Mn_0.05O₂,
- Homogeneous doping
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沈阳化工大学材料科学与工程学院沈阳 110142

Ultrafast spray pyrolysis for synthesizing uniform Mg-doped LiNi0.9Co0.05Mn0.05O2

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通讯作者: 陈斌, bchen63@163.com

Ultrafast spray pyrolysis for synthesizing uniform Mg-doped LiNi_0.9Co_0.05Mn_0.05O₂