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. 2022 Jan 3;14:42. doi: 10.1007/s40820-021-00782-5

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 15 — a Schematic illustration of preparing the PTCDI/rGO composite [131]. b Schematic illustration of the formation of the Cu_2−xSe nanorods; c XRD patterns of Cu_2−xSe and CuSe; SEM d and TEM e images of the Cu_2−xSe nanorods; f Charge transfer process at the reaction interface and intercalation formation energy of Cu_2−xSe (right) and CuSe (left); g Diffusion barrier of Zn²⁺ ion in Cu_2−xSe and CuSe [132].

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