CoSe2-Decorated NbSe2 Nanosheets Fabricated via Cation Exchange for Li Storage
By Zhang, Jianli; Du, Chengfeng; Zhao, Jin; Ren, Hao; Liang, Qinghua; Zheng, Yun; Madhavi, Srinivasan; Wang, Xin; Zhu, Junwu; Yan, Qingyu
Published in ACS Applied Materials & Interfaces
2018
Abstract
Though 2D transition metal dichalcogenides have attracted a lot of attention in energy-storage applications, the applications of NbSe2 for Li storage are still limited by the unsatisfactory theoretical capacity and uncontrollable synthetic approaches. Herein, a controllable oil-phase synthetic route for preparation of NbSe2 nanoflowers consisted of nanosheets with a thickness of ?10 nm is presented. Significantly, a part of NbSe2 can be further replaced by orthorhombic CoSe2 nanoparticles via a post cation exchange process, and the predominantly 2D nanosheet-like morphology can be well-maintained, resulting in the formation of CoSe2-decorated NbSe2 (denoted as CDN) nanosheets. More interestingly, the CDN nanosheets exhibit excellent lithium-ion battery performance. For example, it achieves a highly reversible capacity of 280 mAh g
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