Zr-Doped High-Voltage Spinel LiNiMnO Manufactured via the Coprecipitation Method.

Lithium nickel manganese oxide (LiNiMnO, LNMO) provides an elevated operating potential of 4.7 V and a theoretical capacity of 147 mAh g, without the need for expensive cobalt. Zr-doped LNMO was synthesized using the coprecipitation technique with Couette-Taylor flow. FE-SEM images and TEM SAED patterns revealed that Zr-doped LNMO formed truncated octahedral structures with exposed (100) crystal facets. When compared to undoped LNMO, Zr-doped LNMO exhibited superior electrochemical performance. Electrochemical evaluations showed that Zr-LNMO achieved 85.9% rate capability at 10 C, significantly outperforming the 69.1% of bare LNMO. In addition, Zr-LNMO exhibited high stability, maintaining 76.8% of the discharge capacity even after 100 cycles.