Built-in oriented electric field facilitating durable Zn MnO2 battery
By Sitian Lian, Congli Sun, Weina Xu, Wangchen Huo, Yanzhu Luo, Kangning Zhao, Guanggeng Yao, Wangwang Xu, Yuxin Zhang, Zhi Li and 5 more. Nano Energy, 2019
161 citations recorded by the source corpus.
Abstract Rechargeable aqueous zinc ion batteries are particularly attractive for large-scale application due to their features including low cost, environmental friendliness, and safety. Herein, we report the use of defect engineering to generate oxygen vacancies in tunneled α-MnO2 through surface gradient Ti doping for long-life Zn MnO2 battery. Interestingly, the introduction of surface gradient Ti doping leads to shrinkage of the interlayer, but simultaneously generates oxygen vacancies as compensated by electron due to the decreased valence state of Mn. Moreover, Ti substitution as well as the created oxygen vacancies open the [MnO6] octahedral walls and result in imbalanced charge distribution and local electric field in the crystal structure, accelerating ion/electron migration rates. Thus, diffusion coefficients of both Zn2+ and H+ ions in Ti MnO2 nanowires are improved. Consequently, the Ti MnO2 nanowires show improved both H+ and Zn2+ ions storage capacity in Zn/MnO2 battery and achieved excellent high-rate capability and ultralong cycling stability with a low capacity decay rate of 0.005% per cycle at high rate of 1 A g−1. It is believed that the intentionally created vacancies in this work opens up approaches to enhance existing materials that may have applications in more efficient and durable multi-valent ion battery and other technologies.
Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/c31b9bfffcb02d60f377ccd67fc0aefd16ada747
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Electrical and Electronic Engineering
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Internal electric field engineering for steering photogenerated charge separation and enhancing photoactivity (2019, background): “Schematic illustration of corresponding charge transfer behavior upon charging/ discharging (Bottom right); 2019, Elsevier.(80) F, Schematic of the proposed band gap for the ZBGC electrode; 2019, Elsevier(31) IEF, internal electric field 12 of 20 GUO ET AL.”