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Effect of Surface Treatment with Titanate Coupling Agent on Structure and Performance of LiMn2O4
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Haiyang CAI1, Zhenjing LI2, Guangxin FAN1, Dexuan MENG1, Chaoshuai LIU1
Mining and Metallurgical Engineering | 2024, 44(4) : 18 - 23
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Mining and Metallurgical Engineering | 2024, 44(4): 18-23
• SPECIAL ISSUE: BATTERY MATERIALS •
Effect of Surface Treatment with Titanate Coupling Agent on Structure and Performance of LiMn2O4
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Haiyang CAI1, Zhenjing LI2, Guangxin FAN1, Dexuan MENG1, Chaoshuai LIU1
Affiliations
  • 1.School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China
  • 2.LongBai Group Co., Ltd., Jiaozuo 454000, Henan, China
Published: 2024-08-01 doi: 10.3969/j.issn.0253-6099.2024.04.004
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TiO2 was coated on the surface of LiMn2O4 by thermal decomposition of titanate coupling agent, and the effects of coating treatment on the structure and electrochemical performance of LiMn2O4, as well as material structure in the cycling were all explored. The results show that TiO2 can be uniformly coated on the surface of the LiMn2O4 by thermal decomposition of titanate coupling agent at 550 ℃. Surface coating does not change the crystal structure of LiMn2O4, but obviously improves its electrochemical performance, especially high temperature rate performance and cycle performance. At 55 ℃, LiMn2O4 with TiO2 coating delivers a specific capacity of 75.34 mAh/g at 5C, which is higher than that without coating (43.05 mAh/g). After 150 cycles, the capacity retention rate of the material with TiO2 coating and without coating is 77.27% and 62.85%, respectively. The improvement of electrochemical performance is attributed to reduction of Mn dissolution in the cathode material by TiO2 coating, which thus inhibits the change of crystal structure during cycling process, reduces the electrode polarization and charge transfer impedance, as well as improves the charge-discharge reversibility of the material and the Li+ diffusion.

cathode material  /  LiMn2O4  /  TiO2  /  titanate coupling agent  /  surface coating  /  modification  /  electrochemical performance
Haiyang CAI, Zhenjing LI, Guangxin FAN, Dexuan MENG, Chaoshuai LIU. Effect of Surface Treatment with Titanate Coupling Agent on Structure and Performance of LiMn2O4[J]. Mining and Metallurgical Engineering, 2024 , 44 (4) : 18 -23 . DOI: 10.3969/j.issn.0253-6099.2024.04.004
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Article Info
doi: 10.3969/j.issn.0253-6099.2024.04.004
  • Receive Date：2024-06-07
  • Online Date：2026-03-18
  • Published：2024-08-01
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  • Received：2024-06-07
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    1.School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China
    2.LongBai Group Co., Ltd., Jiaozuo 454000, Henan, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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