Thermodynamically Stable Dual-Modified LiF&FeF3 layer Empowering Ni-Rich Cathodes with Superior Cyclabilities

Chu, Youqi1,2,3; Mu, Yongbiao1,2,3; Zou, Lingfeng1,2,3; Hu, Yan1,2,3; Cheng, Jie4; Wu, Buke1,2,3; Han, Meisheng1,2,3; Xi, Shibo5; Zhang, Qing1,2,3; Zeng, Lin1,2,3

2023-04-01

10.1002/adma.202212308

ADVANCED MATERIALS   Impact Factor & Quartile

0935-9648

1521-4095

Pushing the limit of cutoff potentials allows nickel-rich layered oxides to provide greater energy density and specific capacity whereas reducing thermodynamic and kinetic stability. Herein, a one-step dual-modified method is proposed for in situ synthesizing thermodynamically stable LiF&FeF3 coating on LiNi0.8Co0.1Mn0.1O2 surfaces by capturing lithium impurity on the surface to overcome the challenges suffered. The thermodynamically stabilized LiF&FeF3 coating can effectively suppress the nanoscale structural degradation and the intergranular cracks. Meanwhile, the LiF&FeF3 coating alleviates the outward migration of O alpha- (alpha<2), increases oxygen vacancy formation energies, and accelerates interfacial Li+ diffusion. Benefited from these, the electrochemical performance of LiF&FeF3 modified materials is improved (83.1% capacity retention after 1000 cycles at 1C), even under exertive operational conditions of elevated temperature (91.3% capacity retention after 150 cycles at 1C). This work demonstrates that the dual-modified strategy can simultaneously address the problems of interfacial instability and bulk structural degradation and represents significant progress in developing high-performance lithium-ion batteries (LIBs).

intergranular cracks LiF&FeF3 lithium-ion battery nanoscale structural degradation oxygen vacancy

SCI

English

First ; Corresponding

Stable Support Plan Program for Higher Education Institutions[20220815094504001] ; Shenzhen Key Laboratory of Advanced Energy Storage[ZDSYS20220401141000001] ; National Natural Science Foundation of China[NSFC 12175107]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000961688600001

WILEY-V C H VERLAG GMBH

MATERIALS SCIENCE

Web of Science

1.Southern Univ Sci & Technol, Shenzhen Key Lab Adv Energy Storage, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, SUSTech Energy Inst Carbon Neutral, Shenzhen 518055, Peoples R China
4.Nanjing Univ Posts & Telecommun, Sch Sci, New Energy Technol Engn Lab Jiangsu Prov, Nanjing 210023, Jiangsu, Peoples R China
5.Inst Chem & Engn Sci, 1 Pesek Rd, Singapore 627833, Singapore

Chu, Youqi,Mu, Yongbiao,Zou, Lingfeng,et al. Thermodynamically Stable Dual-Modified LiF&FeF3 layer Empowering Ni-Rich Cathodes with Superior Cyclabilities[J]. ADVANCED MATERIALS,2023.

Chu, Youqi.,Mu, Yongbiao.,Zou, Lingfeng.,Hu, Yan.,Cheng, Jie.,...&Zeng, Lin.(2023).Thermodynamically Stable Dual-Modified LiF&FeF3 layer Empowering Ni-Rich Cathodes with Superior Cyclabilities.ADVANCED MATERIALS.

Chu, Youqi,et al."Thermodynamically Stable Dual-Modified LiF&FeF3 layer Empowering Ni-Rich Cathodes with Superior Cyclabilities".ADVANCED MATERIALS (2023).