Synthesis of a nano B2O3:SnO2-coated Li-rich NMC cathode material and its cycling stability enhancement
Solid State Ionics, vol.441, 2026 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 441
- Publication Date: 2026
- Doi Number: 10.1016/j.ssi.2026.117182
- Journal Name: Solid State Ionics
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, INSPEC
- Keywords: B2O3:SnO2coating, Cathode materials, Cycling stability, Electrochemical performance, Li-rich NMC
- Süleyman Demirel University Affiliated: Yes
Abstract
Enhancing cycling stability in Li-rich NMC metal oxides is crucial for advancing the performance of Li-ion batteries, particularly in electric vehicle applications. This study investigates the synthesis and electrochemical properties of uncoated and B2O3:SnO2-coated Li1.2Mn0.54Ni0.13Co0.13O2 samples prepared by the sol-gel technique. Structural and morphological analyses confirm a hexagonal α-NaFeO2 structure with homogeneous coating layers averaging ∼10 nm in thickness. Electrochemical evaluations reveal that the B2O3:SnO2 coating significantly enhances cycling stability, achieving a capacity retention of 90.92% over 120 cycles at C/3 compared to 77.01% for the uncoated sample. While the first discharge specific capacity (236.58 mAh/g) of the coated sample was slightly lower than that of the uncoated sample (255.04 mAh/g), the coated sample demonstrated improved long-term stability, attributed to reduced side reactions and enhanced structural integrity. Rate performance tests also highlighted the coated sample's enhanced capacity retention, with a retention rate of 48.32% from C/5 to 3C, compared to 39.38% for the uncoated sample. These findings underscore the efficacy of the B2O3:SnO2 coating in mitigating degradation mechanisms, offering a viable pathway for developing high-performance cathodes with prolonged operational lifespans.