Communication—Enhancing the Electrochemical Performance of Lithium-Excess Layered Oxide Li1.13Ni0.3Mn0.57O2 via a Facile Nanoscale Surface Modification

Haodong Liu,Sunny Hy,Danna Qian,Jiajia Huang,Jian Luo,Chengcheng Fang,Ying Shirley Meng

doi:10.1149/2.0821606jes

Abstract

In this work, a facile surface modification with nanoscale equilibrium Li3PO4-based surface amorphous films (SAFs) has been applied to Lithium-excess layered oxide Li1.13Ni0.3Mn0.57O2, which significantly improves the first cycle coulombic efficiency, rate capability, and cycling stability. The nanoscale surface modification can be easily achieved by ballmilling and isothermal annealing. The optimized surface modified Li1.13Ni0.3Mn0.57O2 is capable of maintaining a high capacity of 201 mAh g−1 after 60 cycles at 55°C testing with a rate of 1 C. This work provides a facile and scalable surface modification method to improve electrochemical performance of cathode materials for lithium ion batteries.

Highlights

Title Communication-Enhancing the Electrochemical Performance of Lithium-Excess Layered Oxide Li1.13Ni0.3Mn0.57O2 via a Facile Nanoscale Surface Modification
The mixture of 2 wt% Li3PO4 and Li1.13Ni0.3Mn0.57O2 annealed at 600◦C shows significantly improved coulombic efficiency in first cycle, rate capability, and cycling stability of Li-excess
These improvements are valid even at an elevated temperature. We expect that this scalable method will work for other high voltage cathode materials for lithium ion batteries

Summary

Introduction

Title Communication-Enhancing the Electrochemical Performance of Lithium-Excess Layered Oxide Li1.13Ni0.3Mn0.57O2 via a Facile Nanoscale Surface Modification. Communication—Enhancing the Electrochemical Performance of Lithium-Excess Layered Oxide Li1.13Ni0.3Mn0.57O2 via a Facile Nanoscale Surface Modification

Results

Conclusion