Highly conductive ZrO2–x spheres as bifunctional framework stabilizers and gas evolution relievers in nickel-rich layered cathodes for lithium-ion batteries

Rational Design of Multifunctional Surface Modification for Ni-Rich Layered Cathodes of Lithium-Ion Batteries

“…Moreover, the LNCM cathode showed marked decaying in cycling retention (LNCM: 42.6%) after 100 cycles, which is attributable to severe parasitic reactions mainly estimated by electrolyte decomposition upon cycling. 64,65 On the other hand, the TB-LNCM cathodes appeared to significantly improve their retention rate: they afforded approximately 20% higher retention than that cycled by LNCM cathodes (0.5 TB-LNCM: 59.6%, 0.75 TB-LNCM: 64.5%, and 1.0 TB-LNCM: 62.5%). This is because the TB-based CEI layers inhibited electron transfer at the LNCM interfaces, suppressing the reduction of Ni 4+ to Ni 2+ species.…”

Elucidating the Relationship between Quality Control of the Coating Layer and Suppression of Gas Evolution in Li-Ion Batteries

“…Min et al demonstrated that the NCM coating approach using Co 3 O 4 material allows Li-ion conductive coating layer synthesis with residual lithium (LiOH, Li 2 CO 3 ) to form an LCO phase, which enhances the electrochemical properties, reduces the amount of residual lithium, and enhances Li diffusion as well as electrochemical activity 2 L i O H ( s ) → normalL normali 2 normalO ( s ) + H 2 normalO ( g ) normalL normali 2 normalC normalO 3 ( s ) → normalL normali 2 normalO ( s ) + normalC normalO 2 ( g ) normalC normalo 3 O 4 + normalL normali 2 normalO → 2 L i C o O 2 + C O The environment for the synthesis of LiCoO 2 is 500–600 °C lower than the temperature of the particle surfaces caused by MF, so the LCO phase can be formed. − On the other hand, since the residual lithium and ZrO 2 react at 750–950 °C, the possibility of synthesis of Li 2 ZrO 3 is relatively low. − …”

“…Min et al demonstrated that the NCM coating approach using Co 3 O 4 material allows Li-ion conductive coating layer synthesis with residual lithium (LiOH, Li 2 CO 3 ) to form an LCO phase, which enhances the electrochemical properties, reduces the amount of residual lithium, and enhances Li diffusion as well as electrochemical activity The environment for the synthesis of LiCoO 2 is 500–600 °C lower than the temperature of the particle surfaces caused by MF, so the LCO phase can be formed. − On the other hand, since the residual lithium and ZrO 2 react at 750–950 °C, the possibility of synthesis of Li 2 ZrO 3 is relatively low. − Figure S8a,b shows that a quantitative investigation of the coating layer thickness of HMPM and LMPM was performed by XPS depth profiles, based on previous work Figure S8a,b shows XPS curves of Zr 3d and Co 2p 3/2 , respectively, during 55 etching cycles.…”

Effects of Butadiene Sulfone as an Electrolyte Additive on the Formation of Solid Electrolyte Interphase in Lithium-Ion Batteries Based on Li4Ti5O12 Anode Materials

“…In recent years, many researchers have tried to improve SEI film properties by using metal oxide materials, such as Al 2 O 3 [18][19][20], ZrO 2 [21][22][23], and AlF 3 , deposited on the electrode surface, or by using an electrolyte additive, such as vinylene carbonate (VC) [24,25], butyl sultone [26,27], and propane sultone (PS) [28,29], dissolved in the electrolyte system. In most cases, vinyl-and oxy-group such as VC can enhance electrochemical performances such as the cycle stability and capacity utilization of LIBs [30].…”