Superior performance for lithium storage from an integrated composite anode consisting of SiO-based active material and
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RESEARCH ARTICLE
Superior performance for lithium storage from an integrated composite anode consisting of SiO-based active material and current collector Junqiang HUA, Hailiang CHU, Ying ZHU, Tingting FANG, Shujun QIU (✉), Yongjin ZOU, Cuili XIANG, Kexiang ZHANG, Bin LI, Huanzhi ZHANG, Fen XU, and Lixian SUN (✉) Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Centre of Structure and Property for New Energy Materials, and School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
© Higher Education Press 2020
ABSTRACT: Silicon-based material is considered to be one of the most promising anodes for the next-generation lithium-ion batteries (LIBs) due to its rich sources, nontoxicity, low cost and high theoretical specific capacity. However, it cannot maintain a stable electrode structure during repeated charge/discharge cycles, and therefore long cycling life is difficult to be achieved. To address this problem, herein a simple and efficient method is developed for the fabrication of an integrated composite anode consisting of SiO-based active material and current collector, which exhibits a core-shell structure with nitrogen-doped carbon coating on SiO/P micro-particles. Without binder and conductive agent, the volume expansion of SiO active material in the integrated composite anode is suppressed to prevent its pulverization. At a current density of 500 mA$g-1, this integrated composite anode exhibits a reversible specific capacity of 458 mA $h$g-1 after 200 cycles. Furthermore, superior rate performance and cycling stability are also achieved. This work illustrates a potential method for the fabrication of integrated composite anodes with superior electrochemical properties for high-performance LIBs. KEYWORDS: lithium-ion battery; silicon monoxide; red phosphorus; rate performance; integrated composite anode
Contents 1 Introduction 2 Experimental 2.1 Synthesis of SiO/P@GC composite anode 2.2 Sample characterization 2.3 Electrochemical measurements 3 Results and discussion 4 Conclusions Received April 10, 2020; accepted June 4, 2020 E-mails: [email protected] (S.Q.), [email protected] (L.S.)
Acknowledgements References
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Introduction
With an ever-growing demand for electric vehicles/hybrid electric vehicles (EV/HEV) and portable electronic devices, researchers have been looking for high-performance energy storage equipment with satisfactory energy/power density, long cycle life and high safety [1–2]. The development of high-performance secondary batteries has become imminent. Among them, lithium-ion batteries (LIBs) have
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Front. Mater. Sci.
dominated the market for many years due to their high energy density and negligible memory effect. However, high-performance LIBs with preeminent energy/power density have been desperately required to meet the everincreasing demand in the future. As the electrode material is one of the key components that affect the overall performance of LIBs, there are high requirements for the e
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