For large-scale cathode-material synthesis, the sol-gel process with an atomically mixed metal precursor could provide a facile route to achieve a homogeneously mixed oxide-based cathode material. However, the industrial feasibility of this strategy could be limited by the high preparation cost of the precursors. Although this can be addressed by utilizing low-cost reagents and simplifying the calcination step, typically a trade-off would exist between the cost and the performance. In this study, we demonstrate the facile large-scale synthesis of lithium nickel manganese oxide (LiNi0.5Mn1.5O4) by using a polyvinylpyrrolidone-assisted citric-acid sol-gel combustion method. After single-step calcination at 900 °C for 12 h, the LiNi0.5Mn1.5O4 particles with a truncated octahedron morphology showed a superb discharge capacity (130.8 mAh·g−1) and cyclability (90.9% after 200 cycles).

中文翻译：

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聚乙烯吡咯烷酮辅助柠檬酸溶胶-凝胶燃烧法大规模合成高电化学性能LiNi0.5Mn1.5O4

对于大规模阴极材料合成，使用原子混合金属前驱体的溶胶-凝胶工艺可以提供一条简便的途径来实现均匀混合的氧化物基阴极材料。然而，该策略的工业可行性可能受到前体高制备成本的限制。虽然这可以通过使用低成本试剂和简化煅烧步骤来解决，但通常会在成本和性能之间进行权衡。在本研究中，我们展示了使用聚乙烯吡咯烷酮辅助柠檬酸溶胶-凝胶燃烧法轻松大规模合成锂镍锰氧化物 (LiNi0.5Mn1.5O4)。在 900 °C 单步煅烧 12 h 后，具有截头八面体形态的 LiNi0.5Mn1.5O4 颗粒显示出极好的放电容量（130.