Superior-Performance Aqueous Zinc Ion Battery Based on Structural Transformation of MnO2 by Rare Earth Doping,The Journal of Physical Chemistry C

当前位置： X-MOL 学术 › J. Phys. Chem. C › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Superior-Performance Aqueous Zinc Ion Battery Based on Structural Transformation of MnO2 by Rare Earth Doping
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2019-09-06 , DOI: 10.1021/acs.jpcc.9b05535
Jianwei Wang ₁ , Xiaolei Sun ₂ , Hongyang Zhao ₁ , Lingling Xu ₁ , Jiale Xia ₁ , Meng Luo ₁ , Yaodong Yang ₁ , Yaping Du ₂

Affiliation

Doping with heteroatoms is being used as an effective way to change electronic structure of electrode materials for advanced storage systems. Herein, β-MnO₂ and rare earth (cerium) doped MnO₂ cathode materials have been successfully prepared for aqueous zinc ion batteries. Cerium doping induced structural transformation of MnO₂ from β- to α-phase, along with the evident improvement of conductivity, stability, and reversibility. Compared to the undoped β-MnO₂, the doping cathode possessed excellent cycling stability at a high rate of 5 C and higher rate capability. Cyclic voltammetry curves, electrochemical impedance spectroscopy, galvanostatic intermittent titration technique, scanning electron microscopy, and transmission electron microscopy measurements demonstrated that cerium doping caused fast Zn²⁺ diffusion and excellent electrochemical stability.

中文翻译：

基于稀土掺杂MnO2结构转变的高性能水性锌离子电池。

杂原子掺杂被用作改变用于高级存储系统的电极材料的电子结构的有效方法。这里，β-MnO的₂和稀土（铈）掺杂的MnO ₂阴极材料已用于水性锌离子电池被成功制备。铈掺杂诱导MnO ₂从β相转变为α相，并显着提高导电性，稳定性和可逆性。相较于未掺杂β-的MnO ₂，掺杂阴极在5 C的高倍率和更高的倍率能力下具有出色的循环稳定性。循环伏安曲线，电化学阻抗谱，恒电流间歇滴定技术，扫描电子显微镜和透射电子显微镜测量表明，铈掺杂引起Zn ^2+的快速扩散和优异的电化学稳定性。

更新日期：2019-09-06

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南