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Fluoride graphdiyne as free-standing electrode displaying ultra-stable and extraordinary high Li storage performance

Abstract

In natural two-dimensional (2D) materials (such as graphene, transition metal dichalcogenides and transition metal carbides), the energy and power density are inevitably hindered by the Li ion diffusion in perpendicular to the compact atomic layer. At the same time, their cycling stability is haunted by the side reaction due to the large specific surface area and high activity of surface atoms. Here we report the preparation of a new 2D carbon rich framework named fluoride graphdiyne (F-GDY). The experiments, together with theoretical calculations, show that the extraordinarily high reversible capacity (1700 mAh g–1) and extremely stable cycle performance (9000 cycles) are achieved by the reversible transition between C–F semi-ionic bond and ionic bond at the plateaus of 0.9 V. This bottom-up strategy offers a versatile approach to the rational design of ultra-stable flexible 2D materials through solution-based processability for applying in the efficient electrodes of high performance rechargeable batteries.

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Publication details

The article was received on 06 Jun 2018, accepted on 02 Aug 2018 and first published on 03 Aug 2018


Article type: Paper
DOI: 10.1039/C8EE01642A
Citation: Energy Environ. Sci., 2018, Accepted Manuscript
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    Fluoride graphdiyne as free-standing electrode displaying ultra-stable and extraordinary high Li storage performance

    J. He, N. Wang, Z. Yang, X. Shen, K. Wang, C. Huang, Y. Yi, Z. Tu and Y. Li, Energy Environ. Sci., 2018, Accepted Manuscript , DOI: 10.1039/C8EE01642A

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