TY - JOUR
T1 - Enhanced structural stability and durability in lithium-rich manganese-based oxide via surface double-coupling engineering
AU - Zhao, Jiayu
AU - Su, Yuefeng
AU - Dong, Jinyang
AU - Wang, Xi
AU - Lu, Yun
AU - Li, Ning
AU - Huang, Qing
AU - Hao, Jianan
AU - Wu, Yujia
AU - Zhang, Bin
AU - Qi, Qiongqiong
AU - Wu, Feng
AU - Chen, Lai
N1 - Publisher Copyright:
© 2024 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences
PY - 2024/11
Y1 - 2024/11
N2 - Lithium-rich manganese-based oxides (LRMOs) exhibit high theoretical energy densities, making them a prominent class of cathode materials for lithium-ion batteries. However, the performance of these layered cathodes often declines because of capacity fading during cycling. This decline is primarily attributed to anisotropic lattice strain and oxygen release from cathode surfaces. Given notable structural transformations, complex redox reactions, and detrimental interface side reactions in LRMOs, the development of a single modification approach that addresses bulk and surface issues is challenging. Therefore, this study introduces a surface double-coupling engineering strategy that mitigates bulk strain and reduces surface side reactions. The internal spinel-like phase coating layer, featuring three-dimensional (3D) lithium-ion diffusion channels, effectively blocks oxygen release from the cathode surface and mitigates lattice strain. In addition, the external Li3PO4 coating layer, noted for its superior corrosion resistance, enhances the interfacial lithium transport and inhibits the dissolution of surface transition metals. Notably, the spinel phase, as excellent interlayer, securely anchors Li3PO4 to the bulk lattice and suppresses oxygen release from lattices. Consequently, these modifications considerably boost structural stability and durability, achieving an impressive capacity retention of 83.4% and a minimal voltage decay of 1.49 mV per cycle after 150 cycles at 1 C. These findings provide crucial mechanistic insights into the role of surface modifications and guide the development of high-capacity cathodes with enhanced cyclability.
AB - Lithium-rich manganese-based oxides (LRMOs) exhibit high theoretical energy densities, making them a prominent class of cathode materials for lithium-ion batteries. However, the performance of these layered cathodes often declines because of capacity fading during cycling. This decline is primarily attributed to anisotropic lattice strain and oxygen release from cathode surfaces. Given notable structural transformations, complex redox reactions, and detrimental interface side reactions in LRMOs, the development of a single modification approach that addresses bulk and surface issues is challenging. Therefore, this study introduces a surface double-coupling engineering strategy that mitigates bulk strain and reduces surface side reactions. The internal spinel-like phase coating layer, featuring three-dimensional (3D) lithium-ion diffusion channels, effectively blocks oxygen release from the cathode surface and mitigates lattice strain. In addition, the external Li3PO4 coating layer, noted for its superior corrosion resistance, enhances the interfacial lithium transport and inhibits the dissolution of surface transition metals. Notably, the spinel phase, as excellent interlayer, securely anchors Li3PO4 to the bulk lattice and suppresses oxygen release from lattices. Consequently, these modifications considerably boost structural stability and durability, achieving an impressive capacity retention of 83.4% and a minimal voltage decay of 1.49 mV per cycle after 150 cycles at 1 C. These findings provide crucial mechanistic insights into the role of surface modifications and guide the development of high-capacity cathodes with enhanced cyclability.
KW - Lattice strain
KW - Layered lithium-rich cathode
KW - Lithium-ion battery
KW - Oxygen release
KW - Surface double-coupling engineering
UR - http://www.scopus.com/inward/record.url?scp=85198221811&partnerID=8YFLogxK
U2 - 10.1016/j.jechem.2024.06.047
DO - 10.1016/j.jechem.2024.06.047
M3 - Article
AN - SCOPUS:85198221811
SN - 2095-4956
VL - 98
SP - 274
EP - 283
JO - Journal of Energy Chemistry
JF - Journal of Energy Chemistry
ER -