A hybrid LiMn₂O₄-graphene-carbon nanotubes (LMO-GN-CNT) material is synthesized successfully by a facile hydrothermal method. The 15-nm-nanosized LiMn₂O₄ (LMO) particles anchor uniformly in the cross-linked conductive graphene (GN) and carbon nanotubes (CNT) matrix in the LMO-GN-CNT composite. Rechargeable hybrid aqueous batteries (ReHABs) are assembled by using LMO-based materials as cathodes and zinc metal as anodes. Galvanostatic charging/discharging cycles of the LMO-GN-CNT composite are performed in rechargeable hybrid aqueous batteries (ReHABs) in comparison of LMO-GN composite and pristine LMO material. Electrochemical measurements indicate that the LMO-GN-CNT composite exhibits superior rate capability and cycle ability. The initial discharge capacity of 129 and 100 mAh g⁻¹ can be delivered at 0.2 and 5.0 C. The discharge capacity is still above 93 mAh g⁻¹, and capacity retention of over 82.1% is obtained after 600 cycles at 2.0 C. The satisfactory electrochemical properties can be ascribed to the little aggregation and good dispersion of the nanosized LMO particles and the introduction of GN and CNT, which can enhance the conductivity, shorten the diffusion length of electrolyte, and provide a large specific surface area for lithium storage.

通过一种简便的水热方法成功地合成了混合的LiMn ₂ O _4-石墨烯-碳纳米管（LMO-GN-CNT）材料。15 nm纳米LiMn ₂ O ₄（LMO）颗粒均匀锚固在LMO-GN-CNT复合材料的交联导电石墨烯（GN）和碳纳米管（CNT）基质中。可充电混合水性电池（ReHAB）通过使用基于LMO的材料作为阴极，并使用锌金属作为阳极来组装。比较LMO-GN复合材料和原始LMO材料，在可充电混合水电池（ReHAB）中执行LMO-GN-CNT复合材料的恒电流充电/放电循环。电化学测量表明，LMO-GN-CNT复合材料表现出优异的速率能力和循环能力。初始放电容量129和100 mAh g ^-1可以在0.2和5.0 C的温度下提供。放电容量仍高于93 mAh g ^-1，在2.0 C下循环600次后，容量保持率超过82.1％。令人满意的电化学性能可归因于纳米级LMO颗粒的聚集少，分散性好以及GN和CNT的引入，可增强导电性，缩短了电解质的扩散长度，并为锂存储提供了较大的比表面积。