A general method to synthesize a MoC/C composite material with potential application as an anodic material in lithium-io
- PDF / 1,418,518 Bytes
- 7 Pages / 595.276 x 790.866 pts Page_size
- 13 Downloads / 212 Views
ORIGINAL PAPER
A general method to synthesize a MoC/C composite material with potential application as an anodic material in lithium-ion batteries Tianren Chen 1 & Xuemin Yan 1 & Zhaofei Ma 1 & Yan Zhang 1 & Xianfeng Zheng 1 & Yu Jiang 1 Received: 18 December 2019 / Revised: 22 April 2020 / Accepted: 25 May 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract A MoC/C composite material was conveniently synthesized via self-polymerization and pyrolysis. MoC nanoparticles are evenly distributed upon the carbon matrix and feature a cross-linked structure that can efficiently restrain the aggregation of MoC nanoparticles and relieve the volume alteration during the charging/discharging process. Moreover, the carbon material highly improved conductivity and reduced charge transfer resistance of the MoC/C-based electrode; this ensured its long-term stability with superior reversible capacity. At a current density of 1 A g−1, the MoC/C electrode delivered a reversible specific capacity of 550 mAh g−1 even after 500 cycles, demonstrating excellent electrochemical performance. This MoC-based electrode with an ultralong life cycle could be utilized as an anode material for next-generation lithium-ion batteries. Keywords Molybdenum carbide . Hydrogel . MoC/C composite . Anode . Lithium-ion batteries
Introduction Lithium-ion batteries (LIBs) are utilized extensively in portable electronic devices. However, the fast-increasing demand for more powerful energy devices (especially in the emerging electric vehicle industry) demonstrates the shortcomings of LIBs in rate capability and long life cycles [1–3]. To dramatically enhance the electrochemical performance of LIBs, a great deal of research effort has been carried out worldwide to explore alternative electrode materials which possess high energy and power density [4–6]. Electrodes based on alloying or a conversion reaction exhibit reasonably high theoretical specific capacity, but large volume alteration of the electrode during repeated cycling hampers their practical application in LIBs [7–9]. Owing to its chemical and mechanical stability as well as a relatively high metallic conductivity, much research has focused on transition metal carbides (TMCs) as LIB electrode materials in recent years [10, 11]. Among the many TMCs investigated, molybdenum * Xuemin Yan [email protected] * Yu Jiang [email protected] 1
College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, Hubei, People’s Republic of China
carbide has received particular attention, due to its superior theoretical specific capacity and electrical conductivity [12–14]. Despite those excellent features for LIBs, bulk molybdenum carbides still suffer from severe capacity fading and poor rate capability [2, 15]. To address these problems, various strategies have been employed [16]. Nanostructured molybdenum carbides have proven to be an effective approach; this approach significantly improved the surface-to-volume ratio of molybdenum carbides and substantiall
Data Loading...
