Improved cycle performance of LiMn2O4 cathode material for aqueous rechargeable lithium battery by LaF3 coating

Zhu, Qing1,2; Zheng, Shuai1; Lu, Xuwu1; Wan, Yi2; Chen, Quanqi1; Yang, Jianwen1; Zhang, Ling-zhi1; Lu, Zhouguang2

2016-01-05

10.1016/j.jallcom.2015.09.085

JOURNAL OF ALLOYS AND COMPOUNDS   影响因子和分区

0925-8388

1873-4669

LaF3-coated LiMn2O4 composites were prepared by a simple co-precipitation method using pristine LiMn2O4, La(NO3)(3)center dot 6H(2)O, NH4F and polyvinyl pyrrolidone (PVP) as raw materials and the physical and electrochemical properties of the composites were investigated. The results indicate that LaF3 coating is beneficial to improving the electrochemical performance of LiMn2O4 used as a cathode material for aqueous rechargeable lithium battery (ARLB) in 1 mol/L LiNO3 solution. The optimal LaF3-coated LiMn2O4 composite (L-3-LMO) containing 3 wt% LaF3 exhibits much improved electrochemical performance as compared with the pristine LiMn2O4. When galvanostatically charged and discharged at 2 C (296 mA g(-1)), L-3-LMO displays initial discharge capacity of 118.4 mAh g(-1) and capacity retention of 99.7% after 50 cycles, while the pristine LiMn2O4 presents initial discharge capacity of 109.2 mAh g(-1) and capacity retention of 89.4%. Even at high current density of 10 C, L-3-LMO delivers discharge capacity of 109.5 mAh g(-1) and the capacity remains 107.9 mAh g(-1) after 100 cycles, while the highest discharge capacity of pristine LiMn2O4 is only 101.6 mAh g(-1) and the capacity is as low as 86.3 mAh g(-1) after 100 cycles. The effects of LaF3 coating on Li+ diffusion coefficient, dissolution of manganese ion of electro-active materials are also investigated. (C) 2015 Elsevier B.V. All rights reserved.

Aqueous rechargeable lithium battery (ARLB) Spinel LiMn2O4 LaF3 coating Cathode

SCI ; EI

英语

其他

Science and Technology Innovation Foundation for the Undergraduates of SUSTC[2014S07]

Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering

Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000363270500055

ELSEVIER SCIENCE SA

20154001332334

Cathodes ; Coated materials ; Diffusion coatings ; Electric discharges ; Lanthanum compounds ; Lithium-ion batteries ; Manganese compounds ; Precipitation (chemical)

Electricity: Basic Concepts and Phenomena:701.1 ; Chemical Operations:802.3 ; Coatings and Finishes:813 ; Coating Materials:813.2

MATERIALS SCIENCE

Web of Science

1.Guilin Univ Technol, Coll Chem & Bioengn, Guilin 541004, Peoples R China
2.South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Zhu, Qing,Zheng, Shuai,Lu, Xuwu,et al. Improved cycle performance of LiMn2O4 cathode material for aqueous rechargeable lithium battery by LaF3 coating[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2016,654:384-391.

Zhu, Qing.,Zheng, Shuai.,Lu, Xuwu.,Wan, Yi.,Chen, Quanqi.,...&Lu, Zhouguang.(2016).Improved cycle performance of LiMn2O4 cathode material for aqueous rechargeable lithium battery by LaF3 coating.JOURNAL OF ALLOYS AND COMPOUNDS,654,384-391.

Zhu, Qing,et al."Improved cycle performance of LiMn2O4 cathode material for aqueous rechargeable lithium battery by LaF3 coating".JOURNAL OF ALLOYS AND COMPOUNDS 654(2016):384-391.