@article{Li2021, 
author = {Qiulong Li and Qichong Zhang and Zhengyu Zhou and Wenbin Gong and Chenglong Liu and Yongbao Feng and Guo Hong and Yagang Yao},
title = {Boosting Zn-ion storage capability of self-standing Zn-doped Co3O4 nanowire array as advanced cathodes for high-performance wearable aqueous rechargeable Co//Zn batteries},
year = {2021},
journal = {Nano Research},
volume = {14},
number = {1},
pages = {91-99},
keywords = {high-rate, Zn-doped Co3O4, aqueous rechargeable Co//Zn battery, fiber-shaped, high-capacity},
url = {https://www.sciopen.com/article/10.1007/s12274-020-3046-8},
doi = {10.1007/s12274-020-3046-8},
abstract = {Neutral aqueous rechargeable Co3O4//Zn batteries with high-output voltage and outstanding cycling stability have yielded new insights into wearable energy-storage devices. To meet the increasing demand for a means of powering wearable and portable devices, the development of a high-performance fiber-shaped Co//Zn battery would be highly desirable. However, the intrinsically poor conductivity of Co3O4 significantly restricts the application of these high-capacity and high-rate aqueous rechargeable battery. Encouragingly, density functional theory (DFT) calculations demonstrate that the substitution of Zn for Co3+ leads to an insulator-metal transition in the Zn-doped Co3O4 (Zn-Co3O4). In this study, we used metallic Zn-Co3O4 nanowire arrays (NWAs) as a novel binder-free cathode to successfully fabricate an all-solid-state fiber-shaped aqueous rechargeable (AFAR) Co//Zn battery. The resulting fiber-shaped Co//Zn battery takes advantage of the enhanced conductivity, increased capacity, and improved rate capability of Zn-Co3O4 NWAs to yield a remarkable capacity of 1.25 mAh·cm-2 at a current density of 0.5 mA·cm-2, extraordinary rate capability (60.8% capacity retention at a high current density of 20 mA·cm-2) and an admirable energy density of 772.6 mWh·cm-3. Thus, the successful construction of Zn-Co3O4 NWAs provides valuable insights into the design of high-capacity and high-rate cathode materials for aqueous rechargeable high-voltage batteries.}
}