Advanced electrochemical and mechanical performance of a LiNi_0.91Co_0.06Mn_0.03O₂ cathode via use of a NaCl flux agent

Abstract

We fabricated single-crystalline LiNi0.91Co0.006Mn0.03O2 (SC-NCM) by the NaCl flux method, which improves the overall structural stability. SC-NCM shows better cycle capability than conventional poly-crystalline NCM.

The future nickel metal supply for lithium-ion batteries

“…However, the synthesis of Ni-rich single-crystal NCM materials is a challenge. Currently, some novel methods are used to prepare single-crystal materials such as molten NaCl salt flux method, 61 microfluidic technology, 62 and all-dry solid-phase synthesis. 63 The concentration gradient structure and core–shell structure is to provide high capacity with nickel-rich material as the core, and ensure structural and thermal stability with nickel-short material as the shell, such as concentration gradient LiNi 0.8 Co 0.1 Mn 0.1 O 2 , 64 LiNi 0.9 Co 0.05 Mn 0.05 O 2 core and LiNi 0.6 Co 0.2 Mn 0.2 O 2 shell, 65 and LiNi 0.9 Mn 0.05 Co 0.05 O 2 core and LiNi 1/3 Mn 1/3 Co 1/3 O 2 shell by a rational control of local stoichiometry.…”