General and Scalable Solid-State Synthesis of 2D MPS3 (M = Fe, Co, Ni) Nanosheets and Tuning Their Li/Na Storage Properties

Qinghua Liang, Yun Zheng, Chengfeng Du, Yubo Luo, Jianli Zhang, Bing Li, Yun Zong, Qingyu Yan

科研成果: 期刊稿件文章同行评审

110 引用 (Scopus)

摘要

The scalable preparation of 2D nanomaterials is challenging and highly desirable for fundamental interest and practical applications. Herein, an efficient solid-state method is developed for producing emerging 2D ternary layered metal phosphorus trichalcogenide (MPS3, M = Fe, Co, Ni) nanosheets on a large scale. The high-quality MPS3 single-crystal nanosheets are exposed with (00l) facets and have an average lateral size of ≈200 nm and an average thickness of ≈18 nm. Moreover, their interlayer spacing can be expanded by intercalating propylamine at room temperature. For Li/Na storage applications, such MPS3 nanosheets can achieve: i) high specific capacity owing to the intrinsic composition, realizing a theoretical specific capacity higher than the corresponding metal oxides, and ii) superior rate capability due to the large extrinsic pseudocapacitive contribution from surface redox reactions. Remarkably, the propylamine-intercalated samples show improved Li/Na storage performance due to the better electrical conductivity and enlarged interlayer distance to allow easier ion accessibility and faster ion diffusion. Impressively, the Na-ion batteries based on the intercalated NiPS3 nanosheets deliver 1090 and 536 mA h g−1 at 0.05 and 5.0 A g−1, respectively. This work paves the way for developing MPS3 nanosheets for energy storage and conversion, catalysis, and so on.

源语言英语
文章编号1700304
期刊Small Methods
1
12
DOI
出版状态已出版 - 11 12月 2017
已对外发布

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