The Decay Mechanism Related to Structural and Morphological Evolution in Lithium-Rich Cathode Materials for Lithium-Ion Batteries

Liu, Qiong1; Zheng, Wei2; Lu, Zhouguang2; Zhang, Xuan1; Wan, Kai1; Luo, Jiangshui3,4; Fransaer, Jan1

2020-05-07

10.1002/cssc.202000430

ChemSusChem   影响因子和分区

1864-5631

1864-564X

Li-rich oxides have garnered intense interest recently for their excellent capacity in rechargeable lithium-ion batteries (LIBs). However, poor cycling stability and capacity degradation during the cycling process impede their practical application. Herein, two ball-shaped cobalt-free oxide materials, Li1.1Mg0.05Ni0.3Mn0.55O2 and Li1.1Zn0.05Ni0.3Mn0.55O2, which exhibit excellent cycling performance at a high current between 2 V and 4.8 V, are demonstrated. The two Li-rich materials are prepared from hydrothermally synthesized carbonated precursors. Both oxides exhibit high reversible capacities of 237 and 231 mAh g(-1) at 20 mA g(-1), respectively, originating from the redox of Ni2+/Ni4+ and O2-/(O-2)(n-). Li1.1Mg0.05Ni0.3Mn0.55O2 presents excellent cycling stability after 200 cycles with 90 % capacity retention. Studies of the structural evolution upon electrochemical cycling implies the cathodes undergo a volume expansion, which results in continuous expanding, cracking, and crushing of the spherical particles, which further induces capacity fading in the cathodes.

electrode materials batteries lithium metal oxides reaction mechanisms

SCI ; EI

英语

通讯

KU Leuven Internal Funds[18/149] ; Research Foundation-Flanders (FWO)[12ZV320N][G0B3218N][1529816N] ; National Natural Science Foundation of China[21776120]

Chemistry ; Science & Technology - Other Topics

Chemistry, Multidisciplinary ; Green & Sustainable Science & Technology

WOS:000530656600001

WILEY-V C H VERLAG GMBH

20202108693563

Cobalt compounds ; Nickel compounds ; Lithium compounds ; Zinc compounds ; Manganese compounds ; Lithium-ion batteries ; Magnesium compounds

Web of Science

1.Katholieke Univ Leuven, Dept Mat Engn, B-3001 Leuven, Belgium
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610065, Peoples R China
4.Katholieke Univ Leuven, Dept Phys & Astron, Lab Soft Matter & Biophys, B-3001 Leuven, Belgium

Liu, Qiong,Zheng, Wei,Lu, Zhouguang,et al. The Decay Mechanism Related to Structural and Morphological Evolution in Lithium-Rich Cathode Materials for Lithium-Ion Batteries[J]. ChemSusChem,2020,13(12):3237-3242.

Liu, Qiong.,Zheng, Wei.,Lu, Zhouguang.,Zhang, Xuan.,Wan, Kai.,...&Fransaer, Jan.(2020).The Decay Mechanism Related to Structural and Morphological Evolution in Lithium-Rich Cathode Materials for Lithium-Ion Batteries.ChemSusChem,13(12),3237-3242.

Liu, Qiong,et al."The Decay Mechanism Related to Structural and Morphological Evolution in Lithium-Rich Cathode Materials for Lithium-Ion Batteries".ChemSusChem 13.12(2020):3237-3242.