Rechargeable aqueous Zn-based batteries are highly desirable for future applications in large-scale energy storage since they are inexpensive and safe in comparison with lithium-ion batteries (LIBs). Additionally, the high energy density of Zn batteries, nearly comparable to that of LIBs, stands out in all types of aqueous batteries. Fast charge, extremely important in practical application, is another typical characteristic in aqueous batteries compared to LIBs with organic electrolyte, but little attention has been paid to it thus far. Herein, ultrafast charge of the cathodes in Zn batteries are realized through the rapid conversion of low-valence transition-metal ions to their high-valence solid oxides using a simple high-potential deposition strategy. In particular, the Mn-based cathode exhibits a charge time that is only around 1/40 of that by traditional constant-current charge method, while high capacity is acquired simultaneously due to the multivalent conversion.

由于可充电的基于Zn的水性电池与锂离子电池（LIB）相比价格低廉且安全，因此非常适合将来在大规模能量存储中使用。另外，在所有类型的水性电池中，锌电池的高能量密度几乎可与LIB媲美。与具有有机电解质的LIB相比，快速充电在实际应用中极为重要，它是水性电池的另一个典型特征，但迄今为止，对其的关注很少。在此，通过使用简单的高电势沉积策略将低价过渡金属离子快速转换为高价固体氧化物，可以实现Zn电池中阴极的超快充电。特别是，