2025-09-09：祝贺课题组24届本科生鲍豆豆同学研究论文（本科论文主要内容）在Chinese Chemical Letters发表！
发布时间：2025-09-09
点击次数：
Doudou Bao, Jinwei Zhou*, Ayaz, Li Wang, Xiangming He, Ziang Jiang, Feixiang Wu*, Enhancing Cycling Stability of High-Nickel Cobalt-Free LiNiO2 through La/Al Synergistic Modification: A One-Step Synthesis Approach, Chinese Chemical Letters, 2025.
Due to the high cost and environmental concerns related to the use of cobalt in conventional layered cathode materials based on transition metals, such as NCM, high-nickel and cobalt-free layered oxides have emerged as promising candidates for lithium-ion batteries, offering potentially higher capacities and lower costs. However, the transition to these materials is not without its hurdles, as they typically exhibit poor cycling stability. In light of this, LiNiO2 (LNO), which serves as a prototype for high-nickel and cobalt-free materials, has been the subject of this investigation. Hereby, we have developed a one-step synthesis method for an Al-doped and La4NiLiO8-coated synergistically modified LNO (LA-LNO), involving in situ wet coating followed by high-temperature lithiation, demonstrating that this modification reduces the Ni2+ content in LA-LNO. These alterations effectively alleviate stress variations within the particles during cycling and prevent electrolyte attack on the bulk material in the event of particle fracturing. The La4NiLiO8 epitaxial coating acts as a protective interfacial barrier while also diminishing interface impedance due to its superior electronic and ionic conductivity. This highlights the substantial improvement in the electrochemical performance of LNO achieved through La/Al synergistic modification, providing a valuable benchmark for the synthesis of high-nickel and cobalt-free cathode materials.