LiMn₂O₄ (LMO) is a promising cathode material for the assembly of lithium ion batteries in that it satisfies the requirement for a high specific capacity, but it lacks structural stability during long-term cycling. To overcome this challenge, Al₂O₃ and PPy are coated onto LiMn₂O₄ (PPy/Al₂O₃/LMO) using a sol–gel method followed by oxidative chemical polymerization. The discharge capacity of PPy/Al₂O₃/LMO reaches 121.73 mAh g⁻¹ at a rate of 1C. The retention is as high as 95.81% even after 100 charge/discharge cycles. The enhanced performance of PPy/Al₂O₃/LMO for Li ion storage results from improved electron conductivity, a more rapid ion migration rate, and reduced Mn ion dissolution. This strategy could be further utilized for the synthesis of other cathode materials for use in lithium ion batteries.

LiMn ₂ O ₄（LMO）是用于锂离子电池组装的有前途的正极材料，因为它满足对高比容量的要求，但在长期循环中缺乏结构稳定性。为了克服这一挑战，采用溶胶-凝胶法将Al ₂ O ₃和PPy涂覆在LiMn ₂ O ₄（PPy / Al ₂ O ₃ / LMO）上，然后进行氧化化学聚合。PPy / Al ₂ O ₃ / LMO的放电容量以1C的速率达到121.73 mAh g ^-1。即使经过100次充电/放电循环，保留率仍高达95.81％。PPy / Al的增强性能用于Li离子存储的₂ O ₃ / LMO是由于提高了电子电导率，更快的离子迁移速率以及减少了Mn离子溶解而产生的。该策略可进一步用于合成用于锂离子电池的其他阴极材料。