@article{Zhang2024, 
author = {Baohong Zhang and Tao Jiang and Xinyan Zhou and Xiaoyu Fan and Binbin Jia and Lidong Li},
title = {Unlocking supercapacitive energy storage potential: Catalyzing electrochemically inactive manganese oxides to active MnO2 via heterostructure reconstruction},
year = {2024},
journal = {Nano Research},
volume = {17},
number = {7},
pages = {5897-5906},
keywords = {reconfiguration, supercapacitor, p–n heterojunction, active MnO2, crystalline/amorphous structure},
url = {https://www.sciopen.com/article/10.1007/s12274-024-6577-6},
doi = {10.1007/s12274-024-6577-6},
abstract = {Advancing supercapacitor system performance hinges on the innovation of novel electrode materials seamlessly integrated within distinct architectures. Herein, we introduce a direct approach for crafting nanorod arrays featuring crystalline/amorphous CuO/MnO2−x. This reconfigured heterostructure results in an elevated content of electrochemically active MnO2. The nanorod arrays serve as efficient capacitive anodes and are easily prepared via low-potential electrochemical activation. The resulting structure spontaneously forms a p–n heterojunction, developing a built-in electric field that dramatically facilitates the charge transport process. The intrinsic electric field, in conjunction with the crystalline/amorphous architecture, enables a large capacitance of 1.0 F·cm−2 at 1.0 mA·cm−2, an ultrahigh rate capability of approximately 85.4% at 15 mA·cm−2, and stable cycling performance with 92.4% retention after 10,000 cycles. Theoretical calculations reveal that the presence of heterojunctions allows for the optimization of the electronic structure of this composite, leading to improved conductivity and optimized OH− adsorption energy. This work provides new insights into the rational design of heterogeneous nanostructures, which hold great potential in energy storage applications.}
}