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Updated: Jan 29, 2026

Metal-Assisted Electrochemical Nanoimprinting of Porous and Solid Silicon Wafers
Published on: February 8, 2022
Enhanced Electrochemical Performance of Li1.27Cr0.2Mn0.53O₂ Layered Cathode Materials via a Nanomilling-Assisted
Chengkang Chang1,2, Jian Dong3, Li Guan4
1School of Materials Science and Engineering, Shanghai Institute of Technology,100 Haiquan Road, Shanghai 201418, China. ckchang@sit.edu.cn.
Abstract:
Li1.27Cr0.2Mn0.53O₂ layered cathodic materials were prepared by a nanomilling-assisted solid-state process. Whole-pattern refinement of X-ray diffraction (XRD) data revealed that the samples are solid solutions with layered α-NaFeO₂ structure. SEM observation of the prepared powder displayed a mesoporous nature composed of tiny primary particles in nanoscale. X-ray photoelectron spectroscopy (XPS) studies on the cycled electrodes confirmed that triple-electron-process of the Cr3+/Cr6+ redox pair, not the two-electron-process of Mn redox pair, dominants the electrochemical process within the cathode material. Capacity test for the sample revealed an initial discharge capacity of 195.2 mAh·g-1 at 0.1 C, with capacity retention of 95.1% after 100 cycles. EIS investigation suggested that the high Li ion diffusion coefficient (3.89 × 10-10·cm²·s-1), caused by the mesoporous nature of the cathode powder, could be regarded as the important factor for the excellent performance of the Li1.27Cr0.2Mn0.53O₂ layered material. The results demonstrated that the cathode material prepared by our approach is a good candidate for lithium-ion batteries.
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