Encapsulating MnSe Nanoparticles Inside 3D Hierarchical Carbon Frameworks with Lithium Storage Boosted by in Situ Electrochemical Phase Transformation

Authors

Tao Yang, Hangzhou Dianzi University, Hubei University, University of Sydney
Jianwen Liu, Hubei University, University of Wollongong
Manshu Zhang, China University of Geosciences
Dexin Yang, Hangzhou Dianzi University
Jianhui Zheng, Zhejiang University of Technology
Zhijin Ju, Zhejiang University of Technology
Jianlin Cheng, Zhejiang University of Technology
Jinyang Zhuang, China University of Geosciences
Yangai Liu, China University of Geosciences
Jiasong Zhong, Hangzhou Dianzi University
Hao Liu, University of Technology SydneyFollow
Guoxiu Wang, University of Technology SydneyFollow
Rongkun Zheng, University of Sydney
Zaiping Guo, Hubei University, University of WollongongFollow

RIS ID

138710

Publication Details

Yang, T., Liu, J., Zhang, M., Yang, D., Zheng, J., Ju, Z., Cheng, J., Zhuang, J., Liu, Y., Zhong, J., Liu, H., Wang, G., Zheng, R. & Guo, Z. (2019). Encapsulating MnSe Nanoparticles Inside 3D Hierarchical Carbon Frameworks with Lithium Storage Boosted by in Situ Electrochemical Phase Transformation. ACS Applied Materials and Interfaces, 11 (36), 33022-33032.

Abstract

Electrode materials that act through the electrochemical conversion mechanism, such as metal selenides, have been considered as promising anode candidates for lithium-ion batteries (LIBs), although their fast capacity attenuation and inadequate electrical conductivity are impeding their practical application. In this work, these issues are addressed through the efficient fabrication of MnSe nanoparticles inside porous carbon hierarchical architectures for evaluation as anode materials for LIBs. Density functional theory simulations indicate that there is a completely irreversible phase transformation during the initial cycle, and the high structural reversibility of β-MnSe provides a low energy barrier for the diffusion of lithium ions. Electron localization function calculations demonstrate that the phase transformation leads to high charge transfer kinetics and a favorable lithium ion diffusion coefficient. Benefitting from the phase transformation and unique structural engineering, the MnSe/C chestnut-like structures with boosted conductivity deliver enhanced lithium storage performance (885 mA h g-1 at a current density of 0.2 A g-1 after 200 cycles), superior cycling stability (a capacity of 880 mA h g-1 at 1 A g-1 after 1000 cycles), and outstanding rate performance (416 mA h g-1 at 2 A g-1).