无人机用锂离子电池正极材料Li1.20Mn0.54Ni0.13Co0.13O2的Mo6+掺杂改性研究

doi:10.19964/j.issn.1006-4990.2020-0365

Abstract

Abstract:

A certain content of Mo⁶⁺ was doped into the Li_1.20Mn_0.54Ni_0.13Co_0.13O₂ cathode materials via using the carbonate co-precipitation method and high temperature calcination process.The influences of doping Mo⁶⁺ on crystal structure, morphology and electrochemical properties of the cathode materials were investigated by XRD, SEM, EDS and galvanostatic charge-discharge tests.The results showed that the Li_1.20Mn_0.52Ni_0.13Co_0.13Mo_0.02O₂ exhibited lower cation mixing and excellent electro-chemical properties.Due to the high migration rate of Li⁺, the first irreversible capacity loss of the Mo⁶⁺ doped cathode was reduced, which led to better high rate performance and excellent cycle stability.After 100 cycles at 0.5C, the capacity retention rate of Li_1.20Mn_0.52Ni_0.13Co_0.13Mo_0.02O₂ was 92.2%, which was much higher than that of Li_1.20Mn_0.54Ni_0.13Co_0.13O₂（87.5%）. In addition, when the discharge rate increased to 5C the discharge capacity of Li_1.20Mn_0.54Ni_0.13Co_0.13O₂ was 21.0 mA·h/g lower than that of Li_1.20Mn_0.52Ni_0.13Co_0.13Mo_0.02O₂.Therefore, using Mo⁶⁺ doping Li_1.20Mn_0.54Ni_0.13Co_0.13O₂ cathode materials could effectively improve the cycle retention and high rate discharge performance of lithium-ion battery.

Key words: unmanned aerial vehicles, Li-ion batteries, Li_1.20Mn_0.54Ni_0.13Co_0.13O₂, Mo⁶⁺ doping, electrochemical property

CLC Number:

TQ137.12

ZHANG Yafeng,LI Hongwei,ZHAO Zhijian. Study on Mo⁶⁺ doping into Li_1.20Mn_0.54Ni_0.13Co_0.13O₂ as cathode materials for Li-ion batteries applied in unmanned aerial vehicles[J]. Inorganic Chemicals Industry, 2021, 53(11): 81-85.

Figures/Tables 8

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References 14

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样品	a/nm	c/nm	c/a	I_（003）/I_（104）
Li_1.20Mn_0.54Ni_0.13Co_0.13O₂	0.284 8	1.420 7	4.988	1.62
Li_1.20Mn_0.52Ni_0.13Co_0.13Mo_0.02O₂	0.286 2	1.428 9	4.993	1.74

x	元素理论化学计量比				元素实验化学计量比
x	Mn	Ni	Co	Mo	Mn	Ni	Co	Mo
0.00	0.540	0.130	0.130	0.000	0.542	0.127	0.131	0.000
0.02	0.520	0.130	0.130	0.020	0.519	0.131	0.129	0.021

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on Mo⁶⁺ doping into Li_1.20Mn_0.54Ni_0.13Co_0.13O₂ as cathode materials for Li-ion batteries applied in unmanned aerial vehicles

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Study on Mo6+ doping into Li1.20Mn0.54Ni0.13Co0.13O2 as cathode materials for Li-ion batteries applied in unmanned aerial vehicles