6533b7d9fe1ef96bd126ce88
RESEARCH PRODUCT
Optimized morphology and tuning the Mn3+ content of LiNi0.5Mn1.5O4 cathode material for li-ion batteries
Yan LinJuho VälikangasRafal SlizPalanivel MolaiyanTao HuUlla Lassisubject
cathode materialsli-ion batterylitiumioniakutLiNi0.5Mn1.5O4Mn3+ contentsol-gel methodGeneral Materials ScienceLiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub>; sol-gel method; Mn<sup>3+</sup> content; cathode materials; li-ion batterysähkökemiadescription
The advantages of cobalt-free, high specific capacity, high operating voltage, low cost, and environmental friendliness of spinel LiNi0.5Mn1.5O4 (LNMO) material make it one of the most promising cathode materials for next-generation lithium-ion batteries. The disproportionation reaction of Mn3+ leads to Jahn–Teller distortion, which is the key issue in reducing the crystal structure stability and limiting the electrochemical stability of the material. In this work, single-crystal LNMO was synthesized successfully by the sol-gel method. The morphology and the Mn3+ content of the as-prepared LNMO were tuned by altering the synthesis temperature. The results demonstrated that the LNMO_110 material exhibited the most uniform particle distribution as well as the presence of the lowest concentration of Mn3+, which was beneficial to ion diffusion and electronic conductivity. As a result, this LNMO cathode material had an optimized electrochemical rate performance of 105.6 mAh g−1 at 1 C and cycling stability of 116.8 mAh g−1 at 0.1 C after 100 cycles.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2023-04-15 |