Utilization of electroless plating to prepare Cu-coated cotton cloth electrode for flexible Li-ion batteries
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Utilization of electroless plating to prepare Cu-coated cotton cloth electrode for flexible Li-ion batteries Mai Shi, Shun Wu, Zhen-Dong Han, Shuang Li, Yu-Ting Pan, Shuang Yuan* Qiang Wang
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Received: 16 June 2020 / Revised: 17 August 2020 / Accepted: 30 August 2020 Ó GRINM Bohan (Beijing) Publishing Co., Ltd 2020
Abstract Flexible, lightweight and high conductivity substrates are required for the development of next-generation flexible Li-ion batteries (LIBs). In addition, the interfacial strength between the active material and flexible substrate should be optimized for high-performance LIBs. Herein, cotton cloth (CC) is employed as a flexible substrate, and electroless plating is utilized to deposit a layer of Cu nanoparticles, which enhances the conductivity of CC and acts as a precursor for the active material, i.e., CuO. The results reveal that the in situ etching and subsequent heat treatment converted Cu film into CuO nanowires on CC substrate. Moreover, carbon nanotubes (CNTs) are introduced to enhance the connectivity of CuO
Mai Shi and Shun Wu have contributed equally to this work.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s12598-020-01582-3) contains supplementary material, which is available to authorized users. M. Shi, Z.-D. Han, S. Li, S. Yuan* School of Metallurgy, Northeastern University, Shenyang 110819, China e-mail: [email protected] M. Shi, Z.-D. Han The State Key Lab of Rolling and Automation, and Key Laboratory of Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, China S. Wu, Q. Wang Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 110819, China Y.-T. Pan Foreign Studies College of Northeastern University, Shenyang 110819, China
nanowires. Consequently, the CuO/CNT/CC electrode rendered a high areal capacity of [ 700 lAhcm-2 after 100 charge/discharge cycles as well as excellent rate capability. The current work presents a novel route to develop desirable substrates for next-generation flexible Li-ion batteries. Keywords Electroless plating; Cotton cloth; In situ etching; CuO nanowires array; Flexible electrode
1 Introduction Li-ion batteries (LIBs) render unique advantages, such as excellent cyclic life and high energy density, and are considered as promising candidates in a wide range of applications, such as portable electronic devices and electric vehicles [1–4]. Owing to the rapid development of flexible wearable devices, the flexible LIBs with high capacity, extended cycle life as well as folding and bending characteristics are required [5–8]. However, the copper (Cu) foil, which is widely employed as a current collector in conventional LIBs, cannot be used as a flexible current collector because of irreversible deformation of Cu foil during repeated bending and folding processes. Moreover, the conventional anode material, i.e., graphite, exhibits low theoretical charge storage cap
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