Preparation of graphene oxide/poly(o-phenylenediamine) hybrid composite via facile in situ assembly and post-polymerizat
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ORIGINAL PAPER
Preparation of graphene oxide/poly(o-phenylenediamine) hybrid composite via facile in situ assembly and post-polymerization technology for the anode material of lithium ion battery Chang Su 1
&
Jiaojiao Ma 1 & Bing Han 1 & Lihuan Xu 1
Received: 2 June 2020 / Revised: 15 September 2020 / Accepted: 18 September 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Electrode material is a key factor for high-energy storage battery. In this paper, graphene oxide/poly(o-phenylenediamine) (GO/ PoPD) hybrid composite is prepared by combining the self-assembly process to form graphene oxide/o-phenylenediamine hydrogel and subsequently the in situ oxidation polymerization, which exhibits the open porous morphology with high BET surface area of 347 m2/g. As the anode of lithium ion battery, GO/PoPD possesses the double lithium storage mechanisms from graphene oxide and poly(o-phenylenediamine). Meanwhile, it exhibits an initial discharge-specific capacity of 1632.4 mAh/g and the improved cycling stability. Even after 43 cycles, it still keeps a capacity of 839.5 mAh/g, which is obviously higher than that of GO and PoPD. Furthermore, GO/PoPD hybrid composite presents the enhanced rate performances with the dischargespecific capacities of 1411.7, 718.2, 621.2, and 576.3 mAh/g at current rates of 50, 100, 200, and 500 mA/g, respectively. The improved electrochemical performances are attributed to the formed stable porous morphology, which facilitates the electrolyte ion to penetrate into the electrode matrix during the redox reaction and then results in the improved cell performances. Keywords Poly(phenylenediamine) derivative . Graphene . Hybrid electrode . Lithium ion battery
Introduction Lithium-ion batteries (LIBs) have been widely applied in many fields ranging from mobile phones to automobiles. Electrode material as one of the cell components is the very key factor for a high-energy storage battery, so the new electrode material is urgently required for obtaining batteries with high performances. Carbon-based materials have become a very promising candidate for the anode of battery since the commercial applications of LIBs. It possesses the low Li intercalation potential (~ 0.1 V vs Li/Li+) [1] and the small volume change during lithium ion intercalation/ deintercalation process, which results in the batteries with carbon materials as the anode having the high cell voltage, the high coulombic efficiency, and the low capacity fade. * Chang Su [email protected] * Lihuan Xu [email protected] 1
College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, People’s Republic of China
Furthermore, a stable solid-electrolyte interphase (SEI) can form on the surface of carbon anode during the initial charge/discharge cycles, which can prevent further electrolyte decomposition and then allows for its stable work in the following charge/discharge process [2]. Just now, various carbon materials have been explored as the anode, such as graphite, amorphous
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