@article{Zhang2023, 
author = {Xiaosong Zhang and Mengyuan Wang and Ziyin Guo and Chunhua Chen and Ya-Jun Cheng and Yonggao Xia},
title = {In Situ Inducing Spinel/Rock Salt Phases to Stabilize Ni-Rich Cathode via Sucrose Heat Treatment},
year = {2023},
journal = {Energy Material Advances},
volume = {4},
pages = {0034},
url = {https://www.sciopen.com/article/10.34133/energymatadv.0034},
doi = {10.34133/energymatadv.0034},
abstract = {Nickel-rich cathode materials have attracted widespread interest due to their high capacity; however, the structure is prone to degradation and collapse during cycling, resulting in poor stability performance and safety, hindering the development of high-nickel cathode materials. Here, we propose a straightforward method to consume oxygen on the surface of primary particles during the high-temperature calcination process of precursors, inducing the coupled rearrangement of surface cations, resulting in the in situ generation of a nano-sized mixed spinel/rock salt defect phase, which is confirmed by high-angle annular dark-field scanning transmission electron microscopy. LiNi0.8Co0.1Mn0.1O2 modified with mixed phase not only can reduce side reactions with the electrolyte, resulting in fewer by-products such as LiF and Li2CO3, preventing the formation of excessively thick cathode–electrolyte interface layers, but also can avoid irreversible phase transitions and prevents lattice mismatches. As a result, the cycling performance has been improved to some extent, benefiting from structural stability. In addition, the special 3-dimensional structure of the spinel phase allows the material surface to expand ion transport channels and enhance multiplicative performance. Therefore, this study provides a new perspective on the modification of high-nickel materials and extends the application of nickel-rich materials.}
}