Investigation of facial B2O3 surface modification effect on the cycling stability and high-rate capacity of LiNi1/3Co1/3Mn1/3O2 cathode

A LiNi1/3Co1/3Mn1/3O2 (NCM111) cathode with B2O3 surface modification was prepared in a facial synthesis method using H3BO3 as a modifier precursor. Both TEM and XPS measurements demonstrate that a thin layer of amorphous B2O3 is successfully coated on the surface of 1B2O3@NCM111 particles. XRD, SEM...

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Bibliographic Details
Published in:Journal of alloys and compounds 2020-09, Vol.834, p.155150, Article 155150
Main Authors: Li, Junhao, Liu, Zhongqi, Wang, Yifan, Wang, Ruigang
Format: Article
Language:English
Subjects:
B2O3
Battery
Boron oxides
Cathodes
Chemical diffusion
Cycles
Diffusion coefficient
Discharge
Layered cathode
LiNi1/3Co1/3Mn1/3O2
Surface coating layer
Surface stability
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Summary:A LiNi1/3Co1/3Mn1/3O2 (NCM111) cathode with B2O3 surface modification was prepared in a facial synthesis method using H3BO3 as a modifier precursor. Both TEM and XPS measurements demonstrate that a thin layer of amorphous B2O3 is successfully coated on the surface of 1B2O3@NCM111 particles. XRD, SEM and TEM testing results show that the morphology and lattice structure present little change after coating. The B2O3 surface modified 1B2O3@NCM111 shows 43% improved high-rate (at 5C rate) discharge performance and enhanced cycling stability (with about 92% and 86% capacity retention at 1C and 2C rates after 50 and 100 cycles measurements) compared to the pristine NCM111. EIS and GITT results also present that the 1B2O3@NCM111 electrode with B2O3 surface modification retains higher Li+ chemical diffusion coefficient than the pristine NCM111 even after 50 charge/discharge cycles at 1C rate. [Display omitted] •B2O3 surface-modified LiNi1/3Co1/3Mn1/3O2 cathode was successfully prepared via a facial wet-chemical method.•B2O3 surface-modified LiNi1/3Co1/3Mn1/3O2 cathode shows improved high-rate discharge performance and cycling stability.•B2O3 surface modification acts as a protection layer to hinder the unfavorable side reactions.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2020.155150