Rechargeable aqueous zinc-based batteries (RAZBs) are attractive alternatives for lithium-ion batteries due to their non-flammability, low cost, and high volumetric capacity. However, the lack of durable high potential cathode materials restricts the voltage of RAZBs. Many high potential cathodes are layered lithium metal oxides (e.g., LiCoO₂), which oftentimes degrade in aqueous acidic or neutral electrolytes. This work reports a 1.99 V aqueous Zn/LiCoO₂ hybrid battery with remarkable cycling stability and excellent rate capability. The outstanding performance is rendered by aqueous mildly alkaline ammonia-containing electrolyte (MAAE) that promotes the reversibility of LiCoO₂ cathode and inhibits the dendrite growth of Zn anode. This novel aqueous electrolyte unlocks exciting promises towards advanced aqueous zinc-based batteries with high voltage and high energy density.

可充电水性锌基电池 (RAZB) 具有不可燃性、低成本和高体积容量，是锂离子电池的有吸引力的替代品。然而，缺乏耐用的高电位正极材料限制了 RAZBs 的电压。许多高电位阴极是层状锂金属氧化物（例如，LiCoO ₂），其通常在酸性或中性水性电解质中降解。这项工作报告了一种 1.99 V 水相 Zn/LiCoO ₂混合电池，具有显着的循环稳定性和优异的倍率性能。优异的性能是由水性弱碱性含氨电解液 (MAAE) 提供的，可促进 LiCoO ₂的可逆性阴极并抑制锌阳极的枝晶生长。这种新型水性电解质为具有高电压和高能量密度的先进水性锌基电池带来了令人兴奋的前景。