Bypassing the Rocksalt Intermediate: A Low-Temperature Route to High-Performance LiNiO2 Cathodes with Suppressed Phase Transformation (IMAGE)

Tsinghua University Press

Bypassing the Rocksalt Intermediate: A Low-Temperature Route to High-Performance LiNiO2 Cathodes with Suppressed Phase Transformation

Caption

A low-temperature reaction−high-temperature crystallization strategy fundamentally bypasses the “layered→rocksalt→layered” phase transition of conventional LiNiO2 synthesis by decoupling lithiation from crystallization. The resulting product delivers >220 mAh g−1 with 90% initial Coulombic efficiency and retains 72.5% capacity after 200 cycles (vs. 53.1%), owing to suppressed rocksalt formation, reduced c-axis contraction, and reversible H2−H3 transition.

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Nano Research, Tsinghua University Press

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