Synergistic effects of Zr doping and Li2ZrO3/WO3 co-coating on the physicochemical and electrochemical properties of cobalt-free LiNi0.8Mn0.2O2

Lithium-Ion Conductor Li2ZrO3-Coated Primary Particles To Optimize the Performance of Li-Rich Mn-Based Cathode Materials

“…17 To improve the performance of the LRMC, it is necessary to investigate primary particle surface modification methods to improve the surface structure of the LRMC greatly. Li 2 ZrO 3 (LZO) has good chemical and electrochemical stability, 18,19 which can effectively inhibit the reaction between the electrode material and electrolyte and slow down the dissolution of transition metal ions, thus enhancing the cycling stability, slowing down the production of SEI layers, and reducing the impedance of the material. 20, 21 Li 2 ZrO 3 is also a relatively good conductor of lithium ions with a conductivity of 3.3 × 10 −5 S m −1 at 573 K. 22 The coating of LZO on the boundary of Li 1.2 Mn 0.54 Co 0.13 Ni 0.13 O 2 (LRO) primary particles is achieved by the reaction of ZrO 2 and LRO with the molten NaCl that provides a liquid reaction medium to penetrate the secondary particles and ensure the uniform formation of Li 2 ZrO 3 on the primary particle surface.…”