In situ TEM and half cell investigation of sodium storage in hexagonal FeSe nanoparticles

Kai Wu; Fei Chen; Zhongtao Ma; Bingkun Guo; Yingchun Lyu; Peng Wang; Hangsheng Yang; Qianqian Li; Hongtao Wang; Anmin Nie

doi:10.1039/C9CC02107H

In situ TEM and half cell investigation of sodium storage in hexagonal FeSe nanoparticles†

Kai Wu,‡^a Fei Chen,‡^a Zhongtao Ma,‡^a Bingkun Guo,^a Yingchun Lyu,

^a Peng Wang,^ab Hangsheng Yang,^c Qianqian Li,

*^a Hongtao Wang*^b and Anmin Nie

*^ad

Author affiliations

* Corresponding authors

^a Materials Genome Institute, Shanghai University, Shanghai 200444, China
E-mail: qianqianli@shu.edu.cn

^b Center for X-mechanics, Zhejiang University, Hangzhou 310027, China
E-mail: htw@zju.edu.cn

^c State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

^d Center for High Pressure Science, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
E-mail: anmin@ysu.edu.cn

Abstract

A hexagonal FeSe nanoparticle anode with a novel reaction mechanism and mechanical stability may fully facilitate the desirable rate capability and cycling performance in sodium-ion batteries. In situ TEM reveals that hexagonal FeSe nanoparticle transition to the Fe and Na₂Se phase during sodiation, while the products transform to the tetragonal FeSe phase after desodiation.

Chemical Communications

In situ TEM and half cell investigation of sodium storage in hexagonal FeSe nanoparticles†

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In situ TEM and half cell investigation of sodium storage in hexagonal FeSe nanoparticles

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